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The radiator thermostatic balancing valve is a self-operated constant temperature flow control valve mounted on the radiator. It is composed of a thermostatic valve body and a temperature regulating device for air temperature sensing. The principle of action is that the opening of the thermostatic valve body is automatically controlled to change the amount of hot water passing through the radiator. When the room temperature is lower than the set temperature value, the radiator balancing valve automatically opens (or gradually increases) the radiator to heat the room until the room temperature reaches the set value. When the temperature of the room rises, the temperature sensor pack expands, causing the valve to gradually close (or close), and the heat sink will reduce the heating speed (or stop heating). Simply put, the main function is energy saving and comfort. However, many ordinary customers only use ordinary temperature control valves without a temperature pack, which cannot be automatically turned on or off. It is recommended that everyone adjust the indoor temperature and ensure that the indoor temperature is always at the set temperature by adjusting the hot water flow into the radiator. This thing is necessary for today's energy-efficient buildings. Designing houses and public buildings is a form of radiator heating. At this stage, it is necessary to use a three-way connection with a temperature control valve.

Zheng feng brand is one of the most professional group valve manufacturers in china. And we sincerely invite and welcome people from all around the world to invest and create more values together.

The difference between the two balancing valves is that the thermostatic balancing valve
manually adjusts the opening degree of the thermostat valve, while the auto balancing valve automatically adjusts the opening degree of the thermostat valve by using temperature sensors.

Thermostatic balancing valve (referred to as constant temperature valve) is an energy-saving product. The principle is to control the temperature of the valve by using the temperature sensor in the temperature control valve head. When the room temperature rises, the temperature sensor expands due to thermal expansion and compresses the stem to make the valve close small. When the room temperature drops, the temperature sensor shrinks due to cooling, and the stem springs back to open the valve. Therefore, when the room has other auxiliary heat sources (sunlight, other heaters) and the room temperature is higher than the set temperature, the valve automatically closes down, the water intake of the radiator decreases, ultimately saving the heat of heating.
The setting temperature of the auto balancing valve can be adjusted artificially. The constant temperature valve will automatically control and adjust the water quantity of the radiator according to the set requirements, so as to achieve the purpose of controlling the indoor temperature. Temperature control in user's room is realized by constant temperature control valve of radiator. The constant temperature control valve of radiator is composed of a constant temperature controller, a flow regulating valve and a pair of connectors. The core component of the constant temperature controller is the sensor unit, namely the temperature package. The temperature chamber can induce the volume change caused by the change of ambient temperature, drive the valve core to produce displacement, and then adjust the water quantity of the radiator to change the heat dissipation of the radiator.

Zheng feng is one of the most professional check valve manufacturers china. And we sincerely invite and welcome people from all around the world to invest and create more values together.

Balance valve is a dynamic and static balancing valve under hydraulic conditions. Such as static balance valve, dynamic balance valve.
Valve body material: cast iron, cast steel,
Work pressure is 0.6-4.0 MPA.
The working temperature is - 5 C - 350 C.
Valve caliber DN15-DN300,
Connection mode: flange, internal thread,
Driving mode: manual and electric.
Manufacturing standard: national standard.

How do balancing valves work?
Balancing valve is a special function valve. It has good flow characteristics. Besides, it has valve opening index, opening locking device and pressure measuring valve for flow measurement. By using special intelligent instrument, the flow value flowing through the balance valve can be directly displayed by inputting the valve type and opening value according to the measured pressure difference signal. As long as the balance valve with appropriate specifications is installed in each branch and user's entrance and debugged once with the special intelligent instrument, the flow rate of each user can reach the set value.
Static balancing valves are also called balancing valves, manual balancing valves, digital locking balancing valves, double-position regulating valves, etc. It is through changing the clearance between the spool and the seat (opening), to change the flow resistance through the valve in order to achieve the purpose of regulating flow. Its object of action is the resistance of the system, which can distribute the new water in proportion to the design calculation, increase and decrease the branches in proportion at the same time, still meet the flow demand of part of the load under the current climate needs, and play the role of heat balance. Dynamic balancing valves are divided into dynamic flow balancing valves, dynamic differential pressure balancing valves, self-operated differential pressure control valves and so on.
Dynamic flow balance valve is also called self-operated flow control valve, self-operated balance valve, constant flow valve, automatic balance valve, etc. It automatically changes the drag coefficient according to the change of system working condition (differential pressure). In a certain range of pressure difference, the flow through can be effectively controlled to maintain a constant value, that is, when the pressure difference before and after the valve increases, the flow through the valve can be maintained by the action of automatic closing small. On the contrary, when the pressure difference decreases, the valve opens automatically and the flow rate remains constant. However, when the pressure difference is smaller or larger than the normal working range of the valve, it can not provide additional pressure head after all. At this time, the flow rate of the valve to the full open or closed position is still lower or higher than the set flow rate can not be controlled.
Dynamic differential pressure balancing valve, also known as self-operated differential pressure control valve China, differential pressure controller, constant voltage variable synchronizer, differential pressure balancing valve, etc. It uses differential pressure to adjust the opening of the valve, and uses the change of pressure drop of the valve core to compensate for the change of pipeline resistance, so as to keep the differential pressure basically unchanged when the working condition changes. The differential pressure control valve working principle is that in a certain flow range, it can effectively control the constant pressure difference of the controlled system, that is, when the pressure difference of the system increases, it can ensure that the pressure difference of the controlled system increases by automatically closing the valve. When the pressure difference decreases, the valve opens automatically, and the pressure difference remains constant. The self-operated pressure difference control valve has an automatic plug closing state within the control range. The pressure difference between the two ends of the valve exceeds the preset value. The plug opens automatically and adjusts the opening automatically under the action of the pressure sensitive film to keep the pressure difference between the two ends of the valve relatively constant.

Zheng feng brand is one of the most professional water gate valve manufacturers in china. And we sincerely invite and welcome people from all around the world to invest and create more values together.

Balancing valve types

1. Static Balance Valve: It is also called Balance Valve, Manual Balance Valve, Digital Lock Balance Valve, Double Position Regulating Valve, etc. It changes the flow resistance through the valve by changing the clearance (opening) between the spool and the seat to achieve the purpose of regulating the flow rate. Its object of action is the resistance of the system, which can distribute the new water in proportion to the design calculation. Each branch increases or decreases in proportion at the same time, and still meets the flow demand of part of the current load.

2. Dynamic flow balance valve: It is also called self-operated flow control valve, self-operated balance valve, constant flow valve, automatic balance valve, etc. It automatically changes resistance coefficient according to the change of system working condition (pressure difference). In a certain range of pressure difference, the flow through can be effectively controlled to maintain a constant value, that is, when the pressure difference before and after the valve increases, the flow through the valve can be maintained by the action of automatic closing small. On the contrary, when the pressure difference decreases, the valve opens automatically and the flow rate remains constant.

3. Self-operated differential pressure control valve: it is also known as dynamic differential pressure balance valve, differential pressure controller, stabilized variable synchronizer, differential pressure balance valve, etc. It uses differential pressure to adjust the opening of the valve, and uses the change of pressure drop of the valve core to compensate for the change of pipeline resistance, so as to keep the differential pressure basically unchanged when the working condition changes. Its principle is that it can effectively control the constant pressure difference of the controlled system within a certain flow range. That is to say, when the pressure difference of the system increases, it can ensure that the pressure difference of the controlled system increases through the automatic closing of the valve. On the contrary, when the pressure difference decreases, the valve opens automatically and the pressure difference remains constant.

Zheng feng is one of the most professional water gate valve manufacturers in china. And we sincerely invite and welcome people from all around the world to invest and create more values together.

What is the difference between static balancing and dynamic balancing?

Dynamic balancing valve is divided into two kinds: flow (flow dynamic control valve) and pressure difference (self-operated pressure difference control valve), which are selected according to actual demand. Dynamic balancing valve is used to solve the branch differential pressure balance problem caused by the frequent operation of temperature control valves at each end. The difference between static and static is that the static balance valve (also known as digital lock balance valve) needs to be locked after one-time debugging by a special intelligent instrument to control the total water volume of the system within a reasonable range, but every change needs to be re-locked by the instrument. The dynamic self-reliance is not so troublesome, depending on the pipe. The pressure change of the adjusted medium in the network can automatically keep a constant flow rate, which is a little cheaper in the static engineering cost.

Principle of dynamic balancing valve: By changing the flow area of the spool of the balancing valve to adapt to the changes before and after the valve, so as to achieve the purpose of flow control.

Dynamic balancing valve can be installed on a water supply pipe or the return pipe. When the working pressure of the system fluid exceeds the allowable working pressure of the radiator, the dynamic balancing valve should be installed on the water supply pipe for safety.

Static balancing valves, also known as balancing valves, manual balancing valves, digital lock balancing valves, double-position regulating valves, are used to solve the problem of branch pressure differential balance in pipeline design.

The working principle of the static balance valve is to change the flow resistance through the valve by changing the clearance (opening) between the valve core and the seat in order to achieve the purpose of regulating the flow. Its object of the action is the resistance of the system, which can distribute the new water according to the proportion calculated by the design. Each branch increases or decreases in proportion at the same time, and still satisfies the requirements. The flow demand of partial load under pre-climate needs plays a role of heat balance.

Static balancing valve can be installed on a water supply pipe or the return pipe. Generally, it should be installed on the return pipe. Especially for high-temperature loop, in order to facilitate debugging, it should be installed on the return pipe. The supply (return) pipe with a balance valve does not need to install the stop valve.

Whether static balancing valve or dynamic balancing valve, they are impedance components, especially dynamic balancing valve, which requires the system to consider the additional head caused by the balancing valve when selecting and distributing pumps.

Zhengfeng is one of the most professional check valve manufacturers china . And we sincerely invite and welcome people from all around the world to invest and create more values together.

The radiator thermostatic balancing valve is a self-operated constant temperature flow control valve mounted on the radiator. It is composed of a thermostatic valve body and a temperature regulating device for air temperature sensing. The principle of action is that the opening of the thermostatic valve body is automatically controlled to change the amount of hot water passing through the radiator. When the room temperature is lower than the set temperature value, the radiator balancing valve automatically opens (or gradually increases) the radiator to heat the room until the room temperature reaches the set value. When the temperature of the room rises, the temperature sensor pack expands, causing the valve to gradually close (or close), and the heat sink will reduce the heating speed (or stop heating). Simply put, the main function is energy saving and comfort. However, many ordinary customers only use ordinary temperature control valves without a temperature pack, which cannot be automatically turned on or off. It is recommended that everyone adjust the indoor temperature and ensure that the indoor temperature is always at the set temperature by adjusting the hot water flow into the radiator. This thing is necessary for today's energy-efficient buildings. Designing houses and public buildings is a form of radiator heating. At this stage, it is necessary to use a three-way connection with a temperature control valve.

Zhengfeng is one of the most professional control valve manufacturers in china in China. And we sincerely invite and welcome people from all around the world to invest and create more values together.

Hydraulic balancing valve, also known as automatic balance valve, flow control valve, flow controller, dynamic balance valve, automatic flow valve. Hydraulic balance valve is an intuitive and simple flow control device. The application of hydraulic balancing valve in pipeline network can directly set the flow rate according to the design. The valve of automatic balancing valve can automatically eliminate the flow deviation caused by residual pressure head and pressure fluctuation of pipeline under the action of water. No matter how the system pressure changes, the set flow rate remains unchanged. These hydraulic balancing valve functions(automatic flow balancing valve) make the flow regulation of pipeline network complete at one time, and make the work of network regulation simple flow distribution, effectively solve the hydraulic imbalance of pipeline network.Hydraulic balancing valve is a new type of regulating valve. Compared with manual control valve, it has the advantage of automatic regulation. Compared with the electric control valve, the advantage of the hydraulic balancing valve is that it does not need external power. The application practice has proved that in closed water circulation system (such as hot water heating system, air conditioning refrigeration system), the correct use of hydraulic balance valve can easily realize the flow distribution of the system, realize the dynamic balance of the system, greatly simplify the commissioning work of the system, and stabilize the working state of the pump. Therefore,hydraulic balance valve (automatic flow valve) has a broad application prospect in heating and air conditioning engineering.

Zhengfeng is one of the most professional water gate valve manufacturers in China. And we sincerely invite and welcome people from all around the world to invest and create more values together.

Dynamic flow balancing valves are also known as self-operated flow control valves, self-operated balancing valves, constant flow valves, and automatic balancing valves. It automatically changes the drag coefficient according to changes in system operating conditions. Within a certain pressure difference range, the flow rate can be effectively controlled to maintain a constant value, that is, when the pressure difference between the front and the back of the valve is increased, the flow can be kept not increased by the automatic closing action of the valve. Conversely, when the pressure difference is reduced, the valve automatically opens and the flow remains constant. However, when the pressure difference is less than or greater than the normal working range of the valve, it cannot provide an additional pressure head after all, and the flow rate of the valve to the fully open or fully closed position is still lower or higher than the set flow rate.

Auto balancing valve , also known as dynamic flow balancing valve, flow control valve,dynamic balancing valve, constant flow dynamic balancing valve. The automatic flow balance valve controls the flow through the valve by automatically changing the overflow area of the spool and adapting to the pressure changes before and after the valve. Its flow rate can be set at the production plant, or it can be set on site or electronically adjusted as required.

The automatic flow balancing valve is actually a constant flow valve that keeps the flow constant. Its function is: when some terminal equipment such as fan coil unit, fresh air unit and other control valves in the system adjust with the change of air conditioning load, resulting in the change of pressure in the pipeline network, so that the flow of other terminal equipment remains unchanged, still consistent with the design value.

According to the different flow setting modes, automatic flow balancing valves can be divided into two categories: fixed flow type and field set flow type.

Advantages and characteristics

Dynamic flow balancing valve enables the valve bile to change according to the pressure difference of the water system from time to time, ensuring that it will not exceed the original set water flow and absorb excessive pressure difference, thus realizing the automatic balance of pressure and flow of the whole water system. Therefore, using it has the following benefits.

For owners and construction units:

(1) There is no need for system debugging: it can save you a lot of time and shorten the completion date;

(2) There is no need to install the same process management: it can increase the area and space used for you, save installation and material costs;

(3) Easy to use: the water system balance will not be affected by the phased completion of the project installation or the phased use of the equipment;

(4) Convenient change: When water systems in some areas need to be redesigned, the design and balance of water systems in other areas will not be affected.

(5) Reduce power consumption: As the whole water system is balanced, the refrigeration units (boilers, heat exchangers) and pumps are guaranteed to operate in the best working state, which has obvious energy-saving effect;

(6) Reduce wear and waste: to ensure that water flow will not exceed the original design, to ensure the durability of all equipment, to avoid excessive flow caused by copper pipe loss;

(7) Improving safety: Because the flow balance of water system is automatic, the possibility of destructive regulation is eliminated.

(8) For the designer, the workload is reduced: there is no need to calculate the resistance of the whole pipeline to accelerate the design speed;

(9) It is possible to use the different program system boldly: save pipes, corresponding materials and installation costs, and transfer the work of the balancing hydraulic system to the dynamic flow balancing valve to complete. Many other troubles caused by unbalanced water systems can be avoided.

Working principle

Highly controlled and efficient building environment requires system design engineers to endow novel design concepts in their design. Because of the increasing use of various kinds of fluid control systems, especially the combination of temperature control devices and regional control functions, the use of static balance valves is out of date.

The automatic balancing valve combines innovative design and provides a complete solution to the hydraulic balancing system with maximum flexibility. The original design of the automatic balancing valve is a balancing valve specially designed for refrigeration and heating systems. The use of automatic control valve gallbladder ensures that the flow rate is the designed flow rate and remains constant even in the case of pressure fluctuation.

Zhengfeng is one of the most professional china check valve manufacturers. And we sincerely invite and welcome people from all around the world to invest and create more values together.

Function: The dynamic flow balance valve keeps the flow constant between 31-600KPa.
Role: Keep the flow through the valve constant.
Theory: When the incoming flow pressure P1 increases, the sleeve of the valve sleeve moves downward, compressing the spring inside the valve bladder, and reducing the flow area of the valve hole at the bottom of the valve bladder, that is, reducing the Kv value of the valve bladder. Thus, although the pressure difference ΔP across the damper is increased, the Kv value is reduced, and the product of the two, that is, the flow rate Q, remains substantially unchanged under the action of the spring.
The pipeline of the constant flow system is installed at the end without stepping.
The pump system is chilled water balancing pump and cooling water pump to prevent the pump from over-flowing when the number of units changes.
A place where a constant flow rate is required, such as a cooling tower.
Water supply pipes or return pipes can be installed.
Selection and precautions
Selection: Only according to the flow selection.
A. The valve pressure working range is greater than the minimum starting pressure difference.
B. It cannot be installed in series with the proportional integral electric control valve.
Constant flow system hydraulic balance scheme
Dynamic differential pressure balancing valve
Theory: The high pressure upstream of the electric regulating valve is guided to the lower side of the control bellows through the pressure guiding tube; the pressure downstream of the electric regulating valve is guided to the upper side of the control bellows through the external pressure guiding tube or the internal pressure guiding hole.
When the pressure on the high pressure side rises, the bellows moves upwards, causing the valve stem and the valve cone to move upward, causing the pressure on the medium pressure side to rise, thereby dynamically maintaining the pressure difference between the medium pressure side and the high pressure side and the spring. The preset force balance ensures the dynamic constant of the pressure difference across the electric control valve. When the pressure on the high pressure side is lowered, the bellows moves downward, and the situation is similar.
Adjust the differential pressure of the spring to adjust the differential pressure setting.
Function: Dynamically keep the pressure difference between the controlled points constant at the set value.
Function:
Ensure dynamic hydraulic balance of the controlled system to prevent dynamic imbalance in the system.
Prevents noise and vibration from being generated by the electric control valve regulating valve.
The regulating valve in the system can be selected with a driver with less driving force to avoid the danger of burning the valve.
Provides good valve authority for the regulating valve, ensures the realization of the linear heat-dissipating controlled system, and ensures the rapid and stable system.
The debugging workload is very small, the installation cycle is accelerated, and debugging can be avoided when the system is changed or expanded.
Conveniently correct the difference between actual and design conditions.
Maximum flow limit function.
Ensure dynamic hydraulic balance of the controlled system.
The dynamic differential pressure balancing valve dynamically maintains the pressure difference ΔP between the controlled points constant at the set value, and the Kv value of the other unoperated electric regulating valve does not change, so the water quantity of the branch is dynamically constant. The amount of water in the branch changes only when the electric regulating valve is actuated, that is, when the Kv value changes.
Prevent electric noise and vibration from the electric control valve.
The adjustment valve uses a driver with a smaller driving force.
The pressure difference between the two ends of the electric regulating valve is constant, and the pressure fluctuation of the system is absorbed by the dynamic differential pressure balancing valve. Therefore, the adjusting valve uses a driver with a smaller driving force.
Provides good valve authority for the regulator valve.
Definition of valve authority:
The pipeline of the fixed and variable flow system is installed at the end without step by step.
The pipeline, branch pipe or riser of the variable flow system is installed without stepping.
The valve of the single-pressure pipe must be installed back to the water, and the valve water supply or return pipe of the double-pressure pipe can be installed.
Selection: The valve body is selected according to the Kv value. The Kv value of the selected valve is greater than the design value. The valve pressure drop is used to calculate the valve Kv value, not the control pressure difference. Select the drive with a controlled differential pressure.
Dynamic differential pressure balance electric control valve
Theory: The essence is that a dynamic differential pressure balancing valve and an electric regulating valve are combined into one. The valve is a double valve cone structure, the upper valve cone is the valve cone of the electric regulating valve, and the lower valve cone is the valve of the dynamic differential pressure balancing valve. Cone, the dynamic differential pressure balancing valve provides a constant pressure difference (0.2Bar or 0.5Bar) before and after the electric valve cone (upper valve cone). The pressure fluctuation of the system is absorbed by the dynamic differential pressure balancing valve, when the electric valve cone ( When the upper valve cone is not actuated, the valve flow capacity kv is constant, and the pressure difference ΔP is constant, so the flow rate Q of the valve is constant; only when the electric valve cone (upper valve cone) acts, the flow through the valve will Changes have occurred, thus achieving a perfect unification of dynamic balance and adjustment functions.
Process: The upper and lower ends of the diaphragm form a balance with the force of the internal spring, ie P1 = P2+P spring.
When the system pressure fluctuates, when P1 increases, the balance is destroyed, and the force below the diaphragm is greater than the upper side, so the diaphragm will move upwards, close the small differential pressure control valve spool, so that P2 increases and reaches equilibrium again. Show.
On the contrary, the differential pressure control valve is opened so that the pressure difference of the regulating valve spool is always constant throughout the operation of the switch, so that the flow rate change through the valve is only one-to-one corresponding to the opening degree of the regulating valve.
The pipeline of the variable flow system is installed at the end without stepping.
The main advantage:
1. The occupied space is small, and the automatic balance of the system is good.
2. One leak point is missing for each group of valves.
3. Easy to install and maintain.
Disadvantages:
1. It is not as flexible as the split solution (dynamic differential pressure balance valve + electric control valve), and the differential pressure of the split solution can be adjusted on site.
Variable flow system hydraulic balance scheme
Solutions to common phenomena of hydraulic imbalance:
1. The system is uneven in temperature and heat. The running energy consumption of the pump is too high → hydraulic calculation, reasonable piping, the same program, static balancing valve. Dynamic differential pressure balancing valve or dynamic flow balancing valve, integral valve.
2. Variable flow system operation is out of regulation. The load is stable, but the room regulating valve moves frequently, causing the room temperature to fluctuate frequently. The system stabilization time is too long → dynamic differential pressure balance valve or integral valve.
3. The regulating valve produces noise and vibration. The regulating valve is not closed, and there is a danger of burning the valve in severe cases. The valve of the regulating valve is too small, the curve of the valve is deformed, and the linear heat-dissipating controlled system becomes a controlled system of the throwing heat. Dynamic differential pressure balancing valve or integral valve.

Zhengfeng is one of the most professional check valve manufacturers china . And we sincerely invite and welcome people from all around the world to invest and create more values together.

Do you know differential pressure control valve working principle?

Balance valve is a dynamic and static balancing valve under hydraulic conditions. Such as static balance valve, dynamic balance valve.

Valve body material: cast iron, cast steel,

Work pressure is 0.6-4.0 MPA.

The working temperature is - 5 C - 350 C.

Valve caliber DN15-DN300,

Connection mode: flange, internal thread,

Driving mode: manual and electric.

Manufacturing standard: national standard.

How does a balancing valve work?

Balancing valve is a special function valve. It has good flow characteristics. Besides, it has valve opening index, opening locking device and pressure measuring valve for flow measurement. By using special intelligent instrument, the flow value flowing through the balance valve can be directly displayed by inputting the valve type and opening value according to the measured pressure difference signal. As long as the balance valve with appropriate specifications is installed in each branch and user's entrance and debugged once with the special intelligent instrument, the flow rate of each user can reach the set value.

Static balancing valves are also called balancing valves, manual balancing valves, digital locking balancing valves, double-position regulating valves, etc. It is through changing the clearance between the spool and the seat (opening), to change the flow resistance through the valve in order to achieve the purpose of regulating flow. Its object of action is the resistance of the system, which can distribute the new water in proportion to the design calculation, increase and decrease the branches in proportion at the same time, still meet the flow demand of part of the load under the current climate needs, and play the role of heat balance. Dynamic balancing valves are divided into dynamic flow balancing valves, dynamic differential pressure balancing valves, self-operated differential pressure control valves and so on.

Dynamic flow balance valve is also called self-operated flow control valve, self-operated balance valve, constant flow valve, automatic balance valve, etc. It automatically changes the drag coefficient according to the change of system working condition (differential pressure). In a certain range of pressure difference, the flow through can be effectively controlled to maintain a constant value, that is, when the pressure difference before and after the valve increases, the flow through the valve can be maintained by the action of automatic closing small. On the contrary, when the pressure difference decreases, the valve opens automatically and the flow rate remains constant. However, when the pressure difference is smaller or larger than the normal working range of the valve, it can not provide additional pressure head after all. At this time, the flow rate of the valve to the full open or closed position is still lower or higher than the set flow rate can not be controlled.

Dynamic differential pressure balancing valve, also known as self-operated differential pressure control valve, differential pressure controller, constant voltage variable synchronizer, differential pressure balancing valve, etc. It uses differential pressure to adjust the opening of the valve, and uses the change of pressure drop of the valve core to compensate for the change of pipeline resistance, so as to keep the differential pressure basically unchanged when the working condition changes. The valve working principle is that in a certain flow range, it can effectively control the constant pressure difference of the controlled system, that is, when the pressure difference of the system increases, it can ensure that the pressure difference of the controlled system increases by automatically closing the valve. When the pressure difference decreases, the valve opens automatically, and the pressure difference remains constant. The self-operated pressure difference control valve has an automatic plug closing state within the control range. The pressure difference between the two ends of the valve exceeds the preset value. The plug opens automatically and adjusts the opening automatically under the action of the pressure sensitive film to keep the pressure difference between the two ends of the valve relatively constant.

Zhengfeng is one of the most professional china check valve manufacturers. And we sincerely invite and welcome people from all around the world to invest and create more values together.

Dynamic balancing valve is divided into two kinds: flow (flow dynamic control valve) and pressure difference (self-operated pressure difference control valve), which are selected according to actual demand. Dynamic balancing valve is used to solve the branch differential pressure balance problem caused by the frequent operation of temperature control valves at each end. The difference between static and static is that the static balance valve (also known as digital lock balance valve) needs to be locked after one-time debugging by a special intelligent instrument to control the total water volume of the system within a reasonable range, but every change needs to be re-locked by the instrument. The dynamic self-reliance is not so troublesome, depending on the pipe. The pressure change of the adjusted medium in the network can automatically keep a constant flow rate, which is a little cheaper in the static engineering cost.
Principle of dynamic balancing valve: By changing the flow area of the spool of the balancing valve to adapt to the changes before and after the valve, so as to achieve the purpose of flow control.
Dynamic balancing valve can be installed on a water supply pipe or the return pipe. When the working pressure of the system fluid exceeds the allowable working pressure of the radiator, the dynamic balancing valve should be installed on the water supply pipe for safety.
Static balancing valves, also known as balancing valves, manual balancing valves, digital lock balancing valves, double-position regulating valves, are used to solve the problem of branch pressure differential balance in pipeline design.
The working principle of the static balance valve is to change the flow resistance through the valve by changing the clearance (opening) between the valve core and the seat in order to achieve the purpose of regulating the flow. Its object of the action is the resistance of the system, which can distribute the new water according to the proportion calculated by the design. Each branch increases or decreases in proportion at the same time, and still satisfies the requirements. The flow demand of partial load under pre-climate needs plays a role of heat balance.

Static balancing valve can be installed on a water supply pipe or the return pipe. Generally, it should be installed on the return pipe. Especially for high-temperature loop, in order to facilitate debugging, it should be installed on the return pipe. The supply (return) pipe with a balance valve does not need to install the stop valve.
Whether static balancing valve or dynamic balancing valve, they are impedance components, especially dynamic balancing valve, which requires the system to consider the additional head caused by the balancing valve when selecting and distributing pumps.

ZECO is one of the most professional control valve manufacturers in china , and we have been devoted to produce control valve china for many years. If you want to know more details or want a quotation, just feel free to contact us!

The radiator thermostatic balancing valve is a self-operated constant temperature flow control valve mounted on the radiator. It is composed of a thermostatic valve body and a temperature regulating device for air temperature sensing. The principle of action is that the opening of the thermostatic valve body is automatically controlled to change the amount of hot water passing through the radiator. When the room temperature is lower than the set temperature value, the radiator balancing valve automatically opens (or gradually increases) the radiator to heat the room until the room temperature reaches the set value. When the temperature of the room rises, the temperature sensor pack expands, causing the valve to gradually close (or close), and the heat sink will reduce the heating speed (or stop heating). Simply put, the main function is energy saving and comfort. However, many ordinary customers only use ordinary temperature control valves without a temperature pack, which cannot be automatically turned on or off. It is recommended that everyone adjust the indoor temperature and ensure that the indoor temperature is always at the set temperature by adjusting the hot water flow into the radiator. This thing is necessary for today's energy-efficient buildings. Designing houses and public buildings is a form of radiator heating. At this stage, it is necessary to use a three-way connection with a temperature control valve.

ZECO is one of the most professional control valve manufacturers in china , and we have been devoted to produce valve china for many years. If you want to know more details or want a quotation, just feel free to contact us!

Dynamic flow balancing valves are also known as self-operated flow control valves, self-operated balancing valves, constant flow valves, and automatic balancing valves. It automatically changes the drag coefficient according to changes in system operating conditions. Within a certain pressure difference range, the flow rate can be effectively controlled to maintain a constant value, that is, when the pressure difference between the front and the back of the valve is increased, the flow can be kept not increased by the automatic closing action of the valve. Conversely, when the pressure difference is reduced, the valve automatically opens and the flow remains constant. However, when the pressure difference is less than or greater than the normal working range of the valve, it cannot provide an additional pressure head after all, and the flow rate of the valve to the fully open or fully closed position is still lower or higher than the set flow rate.

Auto balancing valve , also known as dynamic flow balancing valve, flow control valve,dynamic balancing valve, constant flow dynamic balancing valve. The automatic flow balance valve controls the flow through the valve by automatically changing the overflow area of the spool and adapting to the pressure changes before and after the valve. Its flow rate can be set at the production plant, or it can be set on site or electronically adjusted as required.
The automatic flow balancing valve is actually a constant flow valve that keeps the flow constant. Its function is: when some terminal equipment such as fan coil unit, fresh air unit and other control valves in the system adjust with the change of air conditioning load, resulting in the change of pressure in the pipeline network, so that the flow of other terminal equipment remains unchanged, still consistent with the design value.
According to the different flow setting modes, automatic flow balancing valves can be divided into two categories: fixed flow type and field set flow type.
Advantages and characteristics
Dynamic flow balancing valve enables the valve bile to change according to the pressure difference of the water system from time to time, ensuring that it will not exceed the original set water flow and absorb excessive pressure difference, thus realizing the automatic balance of pressure and flow of the whole water system. Therefore, using it has the following benefits.
For owners and construction units:
(1) There is no need for system debugging: it can save you a lot of time and shorten the completion date;
(2) There is no need to install the same process management: it can increase the area and space used for you, save installation and material costs;
(3) Easy to use: the water system balance will not be affected by the phased completion of the project installation or the phased use of the equipment;
(4) Convenient change: When water systems in some areas need to be redesigned, the design and balance of water systems in other areas will not be affected.
(5) Reduce power consumption: As the whole water system is balanced, the refrigeration units (boilers, heat exchangers) and pumps are guaranteed to operate in the best working state, which has obvious energy-saving effect;
(6) Reduce wear and waste: to ensure that water flow will not exceed the original design, to ensure the durability of all equipment, to avoid excessive flow caused by copper pipe loss;
(7) Improving safety: Because the flow balance of water system is automatic, the possibility of destructive regulation is eliminated.
(8) For the designer, the workload is reduced: there is no need to calculate the resistance of the whole pipeline to accelerate the design speed;
(9) It is possible to use the different program system boldly: save pipes, corresponding materials and installation costs, and transfer the work of the balancing hydraulic system to the dynamic flow balancing valve to complete. Many other troubles caused by unbalanced water systems can be avoided.
Working principle
Highly controlled and efficient building environment requires system design engineers to endow novel design concepts in their design. Because of the increasing use of various kinds of fluid control systems, especially the combination of temperature control devices and regional control functions, the use of static balance valves is out of date.
The automatic balancing valve combines innovative design and provides a complete solution to the hydraulic balancing system with maximum flexibility. The original design of the automatic balancing valve is a balancing valve specially designed for refrigeration and heating systems. The use of automatic control valve gallbladder ensures that the flow rate is the designed flow rate and remains constant even in the case of pressure fluctuation.

ZECO is one of the most professional top 10 valve manufacturers in china, and we have been devoted to produce valve group for many years. If you want to know more details or want a quotation, just feel free to contact us!

The difference between the two balancing valves is that the thermostatic balancing valve

manually adjusts the opening degree of the thermostat valve, while the auto balancing valve automatically adjusts the opening degree of the thermostat valve by using temperature sensors.

Thermostatic balancing valve (referred to as constant temperature valve) is an energy-saving product. The principle is to control the temperature of the valve by using the temperature sensor in the temperature control valve head. When the room temperature rises, the temperature sensor expands due to thermal expansion and compresses the stem to make the valve close small. When the room temperature drops, the temperature sensor shrinks due to cooling, and the stem springs back to open the valve. Therefore, when the room has other auxiliary heat sources (sunlight, other heaters) and the room temperature is higher than the set temperature, the valve automatically closes down, the water intake of the radiator decreases, ultimately saving the heat of heating.

The setting temperature of the auto balancing valve can be adjusted artificially. The constant temperature valve will automatically control and adjust the water quantity of the radiator according to the set requirements, so as to achieve the purpose of controlling the indoor temperature. Temperature control in user's room is realized by constant temperature control valve of radiator. The constant temperature control valve of radiator is composed of a constant temperature controller, a flow regulating valve and a pair of connectors. The core component of the constant temperature controller is the sensor unit, namely the temperature package. The temperature chamber can induce the volume change caused by the change of ambient temperature, drive the valve core to produce displacement, and then adjust the water quantity of the radiator to change the heat dissipation of the radiator.

Function: The dynamic flow balance valve keeps the flow constant between 31-600KPa.

Role: Keep the flow through the valve constant.

Theory: When the incoming flow pressure P1 increases, the sleeve of the valve sleeve moves downward, compressing the spring inside the valve bladder, and reducing the flow area of the valve hole at the bottom of the valve bladder, that is, reducing the Kv value of the valve bladder. Thus, although the pressure difference ΔP across the damper is increased, the Kv value is reduced, and the product of the two, that is, the flow rate Q, remains substantially unchanged under the action of the spring.

The pipeline of the constant flow system is installed at the end without stepping.

The pump system is chilled water pump and cooling water pump to prevent the pump from over-flowing when the number of units changes.

A place where a constant flow rate is required, such as a cooling tower.

Water supply pipes or return pipes can be installed.

Selection and precautions

Selection: Only according to the flow selection.

1. The valve pressure working range is greater than the minimum starting pressure difference.
2. It cannot be installed in series with the proportional integral electric control valve.

Constant flow system hydraulic balance scheme

Dynamic differential pressure balancing valve

Theory: The high pressure upstream of the electric regulating valve is guided to the lower side of the control bellows through the pressure guiding tube; the pressure downstream of the electric regulating valve is guided to the upper side of the control bellows through the external pressure guiding tube or the internal pressure guiding hole.

When the pressure on the high pressure side rises, the bellows moves upwards, causing the valve stem and the valve cone to move upward, causing the pressure on the medium pressure side to rise, thereby dynamically maintaining the pressure difference between the medium pressure side and the high pressure side and the spring. The preset force balance ensures the dynamic constant of the pressure difference across the electric control valve. When the pressure on the high pressure side is lowered, the bellows moves downward, and the situation is similar.

Adjust the differential pressure of the spring to adjust the differential pressure setting.

Function: Dynamically keep the pressure difference between the controlled points constant at the set value.

Function:

Ensure dynamic chilled water balancing of the controlled system to prevent dynamic imbalance in the system.

Prevents noise and vibration from being generated by the electric control valve regulating valve.

The regulating valve in the system can be selected with a driver with less driving force to avoid the danger of burning the valve.

Provides good valve authority for the regulating valve, ensures the realization of the linear heat-dissipating controlled system, and ensures the rapid and stable system.

The debugging workload is very small, the installation cycle is accelerated, and debugging can be avoided when the system is changed or expanded.

Conveniently correct the difference between actual and design conditions.

Maximum flow limit function.

Ensure dynamic hydraulic balance of the controlled system.

The dynamic differential pressure balancing valve dynamically maintains the pressure difference ΔP between the controlled points constant at the set value, and the Kv value of the other unoperated electric regulating valve does not change, so the water quantity of the branch is dynamically constant. The amount of water in the branch changes only when the electric regulating valve is actuated, that is, when the Kv value changes.

Prevent electric noise and vibration from the electric control valve.

The adjustment valve uses a driver with a smaller driving force.

The pressure difference between the two ends of the electric regulating valve is constant, and the pressure fluctuation of the system is absorbed by the dynamic differential pressure balancing valve. Therefore, the adjusting valve uses a driver with a smaller driving force.

Provides good valve authority for the regulator valve.

Definition of valve authority:

The pipeline of the fixed and variable flow system is installed at the end without step by step.

The pipeline, branch pipe or riser of the variable flow system is installed without stepping.

The valve of the single-pressure pipe must be installed back to the water, and the valve water supply or return pipe of the double-pressure pipe can be installed.

Selection: The valve body is selected according to the Kv value. The Kv value of the selected valve is greater than the design value. The valve pressure drop is used to calculate the valve Kv value, not the control pressure difference. Select the drive with a controlled differential pressure.

Dynamic differential pressure balance electric control valve

Theory: The essence is that a dynamic differential pressure balancing valve and an electric regulating valve are combined into one. The valve is a double valve cone structure, the upper valve cone is the valve cone of the electric regulating valve, and the lower valve cone is the valve of the dynamic differential pressure balancing valve. Cone, the dynamic differential pressure balancing valve provides a constant pressure difference (0.2Bar or 0.5Bar) before and after the electric valve cone (upper valve cone). The pressure fluctuation of the system is absorbed by the dynamic differential pressure balancing valve, when the electric valve cone ( When the upper valve cone is not actuated, the valve flow capacity kv is constant, and the pressure difference ΔP is constant, so the flow rate Q of the valve is constant; only when the electric valve cone (upper valve cone) acts, the flow through the valve will Changes have occurred, thus achieving a perfect unification of dynamic balance and adjustment functions.

Process: The upper and lower ends of the diaphragm form a balance with the force of the internal spring, ie P1 = P2+P spring.

When the system pressure fluctuates, when P1 increases, the balance is destroyed, and the force below the diaphragm is greater than the upper side, so the diaphragm will move upwards, close the small differential pressure control valve spool, so that P2 increases and reaches equilibrium again. Show.

On the contrary, the differential pressure control valve is opened so that the pressure difference of the regulating valve spool is always constant throughout the operation of the switch, so that the flow rate change through the valve is only one-to-one corresponding to the opening degree of the regulating valve.

The pipeline of the variable flow system is installed at the end without stepping.

The main advantage:

1. The occupied space is small, and the automatic balance of the system is good.
2. One leak point is missing for each group of valves.
3. Easy to install and maintain.

Disadvantages:

1. It is not as flexible as the split solution (dynamic differential pressure balance valve + electric control valve), and the differential pressure of the split solution can be adjusted on site.

Variable flow system hydraulic balance scheme

Solutions to common phenomena of hydraulic imbalance:

1. The system is uneven in temperature and heat. The running energy consumption of the pump is too high → hydraulic calculation, reasonable piping, the same program, static balancing valve. Dynamic differential pressure balancing valve or dynamic flow balancing valve, integral valve.
2. Variable flow system operation is out of regulation. The load is stable, but the room regulating valve moves frequently, causing the room temperature to fluctuate frequently. The system stabilization time is too long → dynamic differential pressure balance valve or integral valve.
3. The regulating valve produces noise and vibration. The regulating valve is not closed, and there is a danger of burning the valve in severe cases. The valve of the regulating valve is too small, the curve of the valve is deformed, and the linear heat-dissipating controlled system becomes a controlled system of the throwing heat. Dynamic differential pressure balancing valve or integral valve.