12 Inch Butterfly Valve

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Description of 12 Inch Butterfly Valve:

Most of ZECO 12 butterfly valves operated by hand-wheel, wrench and handles, pay attention to the operation speed, neither too fast nor too slow, and exert force at proper position. End position is vital important to valve performance. In Close position, ball shall be at right position to seat. The closure parts of the valve seat so close to the campaign and leave the valve seat, the valve sealing performance depends in part on the relative pieces of stem-driven closure of the valve seat to remain sealed and the resulting mechanical force. If the role of a particular incident in the direction of the closure of the closure of the pressure to close the case up from the seat, and that this power is essential. Most of the internal closure of the sliding piece in the valve seat does not rely on force stem seals, but this type of valve position to close the right thing or not is very important. In some cases, when the closure parts close to the final closed position, the driving force needed to close the case may be greatly increased, to reach the required position has been shut down parts of an auxiliary compression. Close cases are not accessible or not stopped in the customs location will have a seal leak and damage. Butterfly Valves requires right position to guarantee sealing. When the indicator shows Close position, movement shall be stopped. If you want to know the 12 inch butterfly valve price, please contact us.

Features of 12 Inch Butterfly Valve:

1. ZECO 12 inch butterfly valve has no dead zone design;
2. ZECO 12 inch butterfly valve has live loaded packing system design;
3. ZECO 12 inch butterfly valve has fire protection structure design;
4. ZECO 12 inch butterfly valve has double safety sealing design.

Material of 12 Inch Butterfly Valve:

The gate valve needs regular maintenance due to the large wear of the valve seat

As a industrial Valve manufacturer, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO valve group co ltd was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Description of 2pc Ball Valve:

ZECO Ball valve is the same to the ordinary that trim spring with the stem to reach the purpose of open/ close, it is mainly adopted to cut off medium on pipe. It features for simple structure, good sealing capacity, flexibility, small blockage coefficient, easy operation etc. ZECO is the global supplier of 2PC ball valves, which can be divided into 2PC floating ball valves and 2PC trunnion mounted ball valves.

Features of 2pc Ball Valve:

1. As the moving parts of valve, ball, valve stem and handle are an assembly unit. The head of valve stem is shaped a diploid, thus to easily distinguish whether valve is in the “ON” position from handle position. When handle or stem diploid is in parallel with the pipe axis, valves is in “ON” position, when handle or stem diploid is vertical to the pipe axis, valve is in “OFF” position;
2. When the medium go through the valve, the pressure in middle cavity would pull out the stem. In order to prevent the occasion from happening, a convexity is designed. At the same time, a lubricator device has been added, so even if the fire damage would happen to damage the o-ring, the lubricator device would inject sealing oil to prevent medium from leaking;
3. When operating the valve, the friction between the ball and the nonmetal seat, like PITE or etc. will produce electrostatic charge that can be accumulated on the ball, To prevent static spark, an anti-static device is placed on the valves to derive the electric charge accumulated in the ball from the static channel between the ball and the stem, or between the stem and valve body;
4. In order to prevent the mal-operation of the valve, the open/close position can be equipped with lock device, especially when they are used outdoor or process forbidden the malfunction.

Material of 2pc Ball Valve:

As a industrial Valve manufacturer, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a  valve group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Description of 3 Inch Ball Valve:

ZECO 3 inch stainless steel ball valve is usually a floating ball valve, the material can also be divided into casting and forging two kinds. ZECO's continuous improvement in products makes all staff in the factory attach equal importance to small-caliber products in batch. No matter from the aspects of purchase, processing, assembly, testing, spraying, or from the traceability of bar codes, ZECO will treat them as equals and try its best to make products more delicate.

Features of 3 Inch Ball Valve:

1. Stem surface roughness is strictly restricted between Ra0.4 and Ra0.8, which ensures entry of graphite packing powder into tiny stem scratches to function as a lubricator, minimizing leakages around stem. Max roughness of stuffing box is RA3.2, which is a proper value to hold packing ring in place and result in better sealing performance;
2. The packing is combination of parallel and vertical layer which is made of die-formed graphite ring processed by flexible graphite, characterizing heat resistance, less stress relaxation and low creep. The special structure means low friction on rotary stem, providing stabilized seal capability for the valve for a long time under frequent functioning;
3. Lipseal is the spring-energized seal, including Elgiloy or Inconel spring and PTFE jacket. lt's effective in a wide breadth of applications, such as highly corrosive chemical media, high sour gas, low temperature or cryogenic service;
4. ZECO strictly control the quality of bulk products, 100% inspection.

Material of 3 Inch Ball Valve:

As a industrial Valve factory, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a valve group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Difference Between Ball Valve and Gate Valve as follow：

The valve core of gate valve and ball vave

The valve core of the ball valve is a ball. Because of its fixed ball structure, the valve is fixed under the condition of high pressure, especially when it is closed. The upper stem and the lower support shaft decompose part of the pressure from the medium, so the ball does not shift to the downstream, so the pressure on the downstream valve seat is relatively small, so the friction force that the valve overcomes when it acts is small, so the valve seat is ground. Small damage, the long service life of the valve, especially for frequently operated valves, this structure is more suitable.

The core of the gate valve is a wedge valve plate or parallel valve plate. There is no supporting shaft at its lower part. Therefore, when the valve is in the high-pressure application and in the closed state, the valve plate bears a great pressure from the medium. Because of the flat gate valve plate structure, all the medium pressure acts on the valve plate at the same time, the valve plate will be dead pressed to the downstream valve seat (at the same time, the excessive pressure acts on the vertical surface of the valve plate, making the valve plate whether wedge-shaped or parallel double ram. There will be some deformation), so the valve needs to overcome great friction when it is opened, so the life of the valve printed by the wear of the valve seat is short.

Valve seat

There is a spring in the valve seat of the ball valve, and the sealing design of the valve seat makes it difficult for the dregs in the medium to enter the valve seat. The valve seat contacts with the valve ball for a long time under the action of spring, so when the valve acts, the valve seat has a certain scraper function, which can scrape off the residue attached to the valve core after long-term operation, so the sealing performance of the valve can be guaranteed for a long time. Especially in the application of high temperature and high pressure, because the materials of valve seat, valve body and valve ball are selected with the same thermal expansion coefficient and the valve seat with spring structure, when the valve is closed, the huge temperature difference and temperature drop will not affect the action of the valve, and the valve will not be locked. The valve seat is very narrow. In high-temperature application, when the valve is closed because the medium is not circulating, the temperature will drop, so the valve seat will be tightened, which will produce a great pressing force on the valve plate. When the valve is opened again, a large torque is needed to overcome this pressing force, which will cause great damage to the valve seat and affect the service life of the valve seat. Thus, the service life of the valve is affected. In addition, due to the self-weight of the gate itself when the valve is closed, it will bring great impact force and noise to the valve.

Itinerary

The stroke of the ball valve is angle stroke, so the installation space is small and the height is low.

The stroke of the gate valve is a straight stroke, so the installation space is large and the height is high.

Actuator

Due to the design of the fixed ball, the torque value of its opening and closing is small, so the corresponding actuator is small. Because the valve plate has a large pressing force on the valve seat, it needs a large torque to overcome this large friction, and the actuator is equipped with a large amount of torque.

Medium flow direction

Double flow direction, no installation flow direction problem on site.

Generally, it is a single flow direction.

Service life

The ball valve has a longer service life, while the gate valve's service life is relatively short.

Maintenance

The ball valve generally does not need maintenance, especially the ball and valve seat. Due to the small wear, it does not need to be replaced within 5 years.

The gate valve needs regular maintenance due to the large wear of the valve seat

As a industrial Valve company, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting china ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Vertical installation of pneumatic ball valve is possible. Generally, installation on pipeline can be divided into parallel installation and vertical installation, which is based on the actual situation of customers. But we recommend that it is generally best to install in parallel, so that it can be easily maintained and it is very beautiful. But in many special cases, pneumatic ball valves can also be installed vertically.

How to install the pneumatic ball valve?

How is the pneumatic ball valve installed? Can the pneumatic ball valve be installed vertically?

Vertical installation of pneumatic ball valves is possible. Generally, installation on pipeline can be divided into parallel installation and vertical ball valve installation, which is based on the actual situation of customers. But we recommend that it is generally best to install in parallel, so that it can be easily maintained and it is very beautiful. But in many special cases, pneumatic ball valves can also be installed vertically. Customers said that the pipeline space of parallel installation is not enough, then it will be installed vertically, which will not affect the service life.

Sealing position of pneumatic ball valve

Pneumatic ball valve seal generally consists of four seals: 1. Stem seal ring 2. Midway seal ring 3. Two seals on both sides. Stem seal ring refers to: seal ring where the valve stem operates, generally with tetrafluoro (PDFE) and flexible graphite; the middle seal ring refers to: the middle connection valve body seal, generally with tetrafluoro (PDFE) and graphite metal composite gasket; the two sides of the seal ring are: the ball core on both sides of the import and export seal ring. It is generally sealed with tetrafluoro (PDFE) and PPL (high temperature resistant sealing ring).

Pneumatic Ball Valve Actuator

The pneumatic ball valve consists of two main parts: actuator and valve. The actuator has two kinds: single-acting and double-acting.

So how to make your pneumatic ball valve easy to use and has long life? The service life of pneumatic ball valves is determined by the on-site use of customers.

To prolong the service life of pneumatic ball valves, the first thing is to keep the gas source stable. The stable gas source can directly affect the speed of the valve switch and the life of the valve sealing ring. It is better to install a couplet on each actuator. This couplet can not only provide stable air pressure, but also regularly refuel the cylinder. It can also discharge moisture from the air, which greatly improves the life of the cylinder. The life of the valve is determined by the medium used in the field.

Professional pneumatic ball valve manufacturers and high quality ball valve will make its life longer. Among various pneumatic ball valve manufacturers, Zeco is the best choice for you. Zeco provides you with high quality pneumatic ball valve products.

The gate valve needs regular maintenance due to the large wear of the valve seat

As a industrial Valve company, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly international standard valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Project ZECO VALVE provided lug butterfly valves, cast steel gate valves and motorized ball valves and some other industrial valves. More

ZECO VALVE provided forged steel ball valves, gear operated gate valves and electric ball valves and some other industrial valves for SINOPEC to complete the successful completion of CNOOC Huizhou project.

ZECO VALVE provided triple offset butterfly valves, gear operated butterfly valves and gear operated gate valves and some other industrial chemical valves for TISCO Expansion Coke Oven Project (VIETNAM).

As a industrial Valve supplier, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a  valve group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Although there are many types of trunnion mounted ball valves produced by trunnion ball valve manufacturers, they all have the following ball valve characteristics:

1. Its operation is labor-saving: the ball is supported by upper and lower bearings, which reduces friction. It eliminates the excessive torque caused by the enormous sealing load formed by the sphere and seal seat driven by the inlet pressure.

2. Reliable sealing performance: PTFE unisexual material seals are embedded in stainless steel seats with springs at the end of the metal seats to ensure sufficient preload of the seals. When the sealing surface of trunnion type ball valve is worn out during use, the valve will continue to ensure good sealing performance under the action of spring.

3. Fire-proof structure: In order to prevent the PTFE sealing ring from burning down due to sudden heat or fire, and to increase the fire potential, a fire-proof sealing ring is set between the sphere and the valve seat. When the sealing ring is burned down, under the action of spring force, the seat sealing ring is quickly pushed onto the sphere to form a metal and metal seal. It has a certain degree of sealing effect. The refractory test meets the requirements of APl6FA and APl607 standards.

4. Automatic pressure relief function: When the medium pressure in the stagnant chamber of the trunnion mounted ball valve constructionincreases abnormally beyond the pre-force of the spring, the seat retreats away from the ball to achieve the effect of automatic pressure relief, and the seat is automatically restored after pressure relief.

5. Drainage pipeline: Both upper and lower parts of the valve body are equipped with discharge L, which can check whether the valve seat leaks or not. In work, when the valve is fully open or closed, the pressure in the middle chamber can be discharged and the filler can be replaced directly. The residue in the middle chamber can be discharged to reduce the medium pollution to the trunnion mounted ball valves.

Zeco Value is one of the most professional trunnion ball valve suppliers. For more information of product features, please visit our website at http://www.zecovalve.com/.

As a industrial Valve factory, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO valve group co ltd was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

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Description of 3 inch flanged butterfly valve:

ZECO 3 inch butterfly valve is a small diameter butterfly valve, usually manually operated, and the connection is usually lug type or wafer type, because the advantage of small diameter butterfly valve is that it is simple in accordance with the way, compared with other valve flange connection operation is fast and simple. ZECO as a professional on the wafer and lug type butterfly valve manufacturer, is strict to the material and appearance of the casting, casting usually arrive ZECO factory, will be isolated in the corresponding area waiting for QC inspector inspection, inspector will, in turn, the chemical composition, physical properties of the casting and design is individually and will follow the ERP system into the data of the product review file for later use. ZECO also pays great attention to every detail in the production process, and each process will be tested and recorded by corresponding inspectors in the ERP system.

Features of 3 Inch Butterfly Valve:

1. ZECO 3 inch butterfly valve can use metal seal structure and resilient seal structure, connection mode can also choose lug type, wafer type and flange connection, the choice of diversity, users can choose according to the actual working conditions to meet the requirements of working conditions;
2. ZECO 3 inch butterfly valve has low torque. Although it is small in size, ZECO engineers make every effort to design the product so that users can feel ZECO's improvement in design, rather than rush through it;
3. The stem of ZECO 3 inch butterfly valve is designed with anti blow-out structure, which can ensure the maintenance personnel to avoid personal safety damage caused by the pressure of the middle chamber pushing out the stem when replacing the packing;
4. The seat and sealing ring of ZECO butterfly valve can be replaced, which ensures the quick and convenient maintenance of maintenance personnel on site.

Material of 3 Inch Butterfly Valve:

We have various valve for sale, the mainly butterfly valve price include 3 inch butterfly valve price,  4 inch butterfly valve price. Welcome to buy.

As a industrial valve manufacturer, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO valve group co ltd was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Description of Floating Ball Valve:

ZECO floating ball valve has two seats supporting the ball. Under medium pressure, the ball can be pressed tightly to the sealing surface for sealing at the outlet end. ZECO floating ball valve is suitable for the condition of temperature from 196 ℃ to 200 ℃, size from 1/2 "to 12", pressure from Class 150 to Class 1500.

Features of Floating Ball Valve:

1. ZECO floating ball valve has the function of indicating switch. The ball, stem and handle are the moving parts of the floating ball valve. ZECO design changes the top of the stem into the flat square structure, This provides a clear indication of the valve in open position during service when the handle is parallel to the line; When the handle is perpendicular to the line, indicate that the valve is closed;
2. ZECO floating ball valve is equipped with a locking device. ZECO adds two limit screws in the packing gland and coordinates the switch locating tab with a lock hole to ensure the damage of the valve caused by excessive opening, On the other hand, it is guaranteed that the valve can be locked in the fully open or fully closed state and cannot be operated by other personnel wrongly;

3. ZECO floating ball valve with the valve stem blow out proof structure, in order to prevent the maintenance of the valve, the pressure of the medium to stem the damage to the maintenance personnel, ZECO set a convex platform at the bottom of the stem structure, on the one hand, to ensure the stem will not be out of the body, on the other hand ensure even packing damage, the valve stem convex sets and close contact between the body and will not lead to a medium large leaking out;

4. ZECO floating ball valve is equipped with anti-static device, friction between the ball, ptfe and other non-metallic materials will generate electrostatic accumulation on the ball, without preventing the danger of electrostatic spark caused by the working condition, ZECO set up an anti-static device at the valve stem, which can export the static electricity through the valve stem.

As a professional china valve supplier, ZECO Valve Group, founded in 1991 located in Shanghai, Yancheng, Wenzhou with focus on manufacturing international standard valve. Contact us to know more about float ball valve price!

Description of Cryogenic Gate Valve:

The main material of ZECO cryogenic gate valve is selected. Considering from the metallographic aspect, in addition to austenitic steel, copper and aluminum with face centered cubic lattice, general steel will appear low temperature brittleness at low temperature, thus reducing the strength and service life of the valve. When the temperature is higher than -100℃, choose ferritic steel; when the temperature is lower than -100℃, choose austenitic steel; low pressure and small diameter valves can choose copper and aluminum and other materials. Stem and fastener is selected, when the temperature is higher than -100℃, stem and bolt materials adopt Ni, Cr-Mo alloy steel, through appropriate heat treatment, to improve tensile strength and prevent thread bite. Austenitic stainless steel is used when the temperature is higher than -100℃. Low hardness of 18-8 acid resistant steel will cause mutual abrasion between stem and packing, causing leakage of packing.Therefore, the stem surface must be hard chrome plated (thickness 0.04-0.06mm), or nitride and nickel-phosphorous plated to improve surface hardness.In order to prevent nuts and bolts from biting to death, the nuts are generally made of Mo steel or Ni steel and coated with molybdenum disulfide on the surface of the threads.

As one of the most professional  cryogenic butterfly valve manufacturers in China, our Cryogenic Gate Valve’s features as below:

1. The valve body of ZECO cryogenic gate valve is able to withstand expansion and contraction due to temperature changes without permanent deformation of the seat structure due to temperature changes;
2. The bonnet of ZECO cryogenic gate valve is constructed with a long neck bonnet to protect the stuffing box.The long neck bonnet design also facilitates winding of cooling material;
3. ZECO cryogenic gate valve uses flexible wedge or open wedge. These structures maintain a reliable seal regardless of temperature;
4. The low temperature properties of the material, such as compression resilience, tightening force, tightening pressure distribution and stress relaxation, are taken into account.

As a professional valve factory,  ZECO Valve Group focus on manufacturing international standard valve. Contact us to know more!

Are you looking for a professional butterfly valve supplier? Butterfly valve is operated through the 90 degree rotation of the butterfly plate and can be used in the pipeline for regulating and stopping media. The disc of the butterfly valve is perpendicular to the direction of medium flow. The user can adjust the flow of medium by opening or closing the butterfly plate.

Butterfly valves are widely used in various industrial fields because of their small size, low cost and convenient installation. Butterfly valves are divided into three categories, the center line china butterfly valve because its stem does not deviate from the center and named. With a rubber seat and no stem packing, the seal is achieved by matching butterfly plate and rubber seat, usually for the soft seal structure for low-pressure water treatment industry and Marine water system.

Double offset butterfly valves: because of its stem axis deviation from center line butterfly plate and valve body, and named, in the open when the butterfly disc can quickly out of the seat, and reduces the open torque, the maximum double offset butterfly valve can adopt resilient sealing structure to metal seal structure, the metal seal structure can improve the use of under high temperature conditions, so the double offset, also known as high performance butterfly valve.

Triple offset butterfly valve: because on the basis of the double offset butterfly disc the sealing surface of the conical cylinder axis and axis deviation from ontology, through position change to torsion, solves the problem of high temperature and high pressure, at the same time through the seat contact area of the structure of the pressure to achieve sealing effect, make the medium pressure, the greater the pressure is, the greater the contact area, solved the difficult problem of metal seal butterfly valve zero leakage.

ZECO Valve Group, founded in 1991 located in Shanghai, Yancheng, Wenzhou with focus on manufacturing international standard valve. Contact us to know more!

Material of a105 valve:

As a professional china valve supplier, ZECO Valve Group, founded in 1991 located in Shanghai, Yancheng, Wenzhou with focus on manufacturing international standard valve. Contact us to know more!

Description of 4 Inch Butterfly Valve:

ZECO 4 inch butterfly valve is made of body, disc, stem, seat, stuffing box, gear etc. ZECO butterfly valve is the most commonly used size on small pipelines, so there is a problem of stocking. Problems when stocking is almost the same with preparation of delivery. Time is the key factor, usually gate valve stocking period is decided by its sealing material. If the valve has to be stocked for several weeks or months, better stocking conditions are needed. Valve is usually stocked indoor and its stocking ambient temperature shall be higher than dew point. If valves are stocked outdoor, support the valve to make sure it does not contact the earth, at the same time, water-proof cover shall be added to the valve.

Features of 4 Inch Butterfly Valve:

1. ZECO 4 inch butterfly valve are easily maintained. At any time pay attention to the sealing surface and shaft seal, When the sealing surface has abrasion or leakage, Generally, use the pressed seal of the screw plate to resolve, when the leakage occurred in the larger, the inner ring can be adjusted plus-one-chip be resolved, if there is damage to seals, plate seals can be removed, the replacement of seals, when the seal leakage, adjust packing gland or seal ring replacement;
2. The Double offset design of ZECO 4 inch butterfly valve is less abrasion, excellent sealing capacity;
3. The limit switch device of ZECO 4 inch butterfly valve ensure right position of open / close;
4. The body, disc and stem of ZECO 4 inch butterfly valve have sufficient strength and flexibility, sealing can be changed inside the valve.

Do you want to know 4 inch butterfly valve price? As a professional valve factory,  ZECO Valve Group focus on manufacturing international standard valve. Contact us to know more!

Description of 12 Inch Gate Valve:

The valve body of ZECO 12 inch gate valve is straight through the structure, which is similar to the straight pipe in the fully open state, to ensure the minimum flow resistance and swirling flow, and reduce the cost on the user's pipeline. There are two ways to connect the valve body and bonnet, one is the bolt connection of valve body bonnet, the other is the pressure self-sealing structure, the interior of the valve body of both kinds of structure is the same, there is a guide rail to allow the gate fixed movement, not caused by deviation from the impact of sealing problems. Bonnet and bracket are integral and split, depending on the size of the gate valve, usually 10 "or less is one piece only bonnet & yoke and 10" or more is bonnet yoke split.

Features of 12 Inch Gate Valve:

1. ZECO technical engineers have fully considered the difficulty of after-sales service, so they developed the structure that can be maintained online, such as renewable valve seat, online replaceable packing, online replaceable hand wheel, etc., so as to facilitate the maintenance of after-sales personnel;
2. The wedge of ZECO 12 inch gate valve is ground to a mirror surface before assembly to ensure that it fits tightly with the seat ring and does not get stuck;
3. The valve stem sealing of ZECO 12 inch gate valve is realized by the collaboration of flexible and woven graphite, ensuring a more reliable tightness;
4. ZECO 12 inch gate valve has a good sealing performance at high temperature, and a wedge valve is not easy to jam after heating. Suitable for steam, high-temperature oil, oil, gas, and other media, as well as frequent switching components.Not suitable for easily coking media.

ZECO Valve Group, founded in 1991 located in Shanghai, Yancheng, Wenzhou with focus on manufacturing international standard valve. Contact us to know more about 12 gate valve price!

Description of 3 Inch Gate Valve:

ZECO 3 inch gate valve is mainly used for fully open or fully closed switching valves. They are usually not used for throttling purposes, but for slurries, viscous fluids, etc. Gate valves feature a removable wedge that moves with the stem nut. The wedge moves perpendicular to the direction of flow. Gate valves usually have a minimum pressure drop when fully open, provide tight shut-off when fully closed, and remain relatively free of contamination buildup.

Features of 3 Inch Gate Valve:

1. The wedge of ZECO 3 inch stainless steel gate valve are fully guided to the seats. For this purpose, ZECO 3inch gate valve is equipped with integral cast gate, which is wedged at a certain angle to the vertical center line, and its function is to close more and more tightly during the closing process. The gate is cast as a whole, machined and automatically surfacing, and has a ring groove on the surface for a better fit on the seat surface;

2. ZECO won't because of urgent orders, and ignore the production technological process, ZECO each production line workers, any steps based on by technology department common processes for production and technology department, at the same time, the engineer of the quality department is on the basis of international standards for production of every step for testing to ensure that products are qualified;

3. The seat ring of ZECO 3 inch gate valve is forged and designed to reduce wear during switching and to prevent wear of the valve body and seal rings during flow;

4. After welding and required heat treatment, the seat ring of ZECO 3 inch gate valve shall be thoroughly cleaned by CNC machine and inspected by inspectors before assembly is allowed.

Description of 4 Inch Butterfly Valve:

ZECO 4 inch butterfly valve is made of body, disc, stem, seat, stuffing box, gear etc. ZECO butterfly valve is the most commonly used size on small pipelines, so there is a problem of stocking. Problems when stocking is almost the same with preparation of delivery. Time is the key factor, usually gate valve stocking period is decided by its sealing material. If the valve has to be stocked for several weeks or months, better stocking conditions are needed. Valve is usually stocked indoor and its stocking ambient temperature shall be higher than dew point. If valves are stocked outdoor, support the valve to make sure it does not contact the earth, at the same time, water-proof cover shall be added to the valve.

Features of 4 Inch Butterfly Valve:

1. ZECO 4 flanged butterfly valve are easily maintained. At any time pay attention to the sealing surface and shaft seal, When the sealing surface has abrasion or leakage, Generally, use the pressed seal of the screw plate to resolve, when the leakage occurred in the larger, the inner ring can be adjusted plus-one-chip be resolved, if there is damage to seals, plate seals can be removed, the replacement of seals, when the seal leakage, adjust packing gland or seal ring replacement;

2. The Double offset design of ZECO 4 inch butterfly valve is less abrasion, excellent sealing capacity;

3. The limit switch device of ZECO 4 inch butterfly valve ensure right position of open / close;

4. The body, disc and stem of ZECO 4 inch butterfly valve have sufficient strength and flexibility, sealing can be changed inside the valve.

Description of 4 Inch Gate Valve:

ZECO 4 inch gate valve is one of the most commonly used calibers. Gate valve in the line just switch effect, looks small, really small gate to pipeline protection as very important, although the gate valve switch is a long time, but the gate valve torque needed to light, in the case of an emergency, if only one person online, if go to close a 4 inch ball valve, may take the human is very big, if the manufacturing process is a little omission cause excessive torque, also likely won't open, but the gate by hand wheel operation, turn the handwheel to drive the stem promoted, this itself is a process of from, open is very light.

Features of 4 Inch Gate Valve:

1. The stem of ZECO 4 inch gate valve adopts T-head which is integral, This is much stronger than threaded or welded stem and is less prone to high pressure bending;

2. The stuffing box of ZECO 4 inch flanged gate valve is deep enough to ensure sufficient packing to keep the stem sealed for a long time. Standard installed stuffing box design requirements meet < 100ppm unorganized emissions requirements, ZECO environmental protection has been ISO 14001 certification, to a sense of social responsibility of the enterprise obligations;

3. The handwheel design of ZECO 4 inch gate valve makes valve be easy to operate, in the manual operation process to use the power up.Turbine drives, electric and pneumatic devices are also available;

4. ZECO 4 inch gate valve has been sent to all parts of the world, and have been well received by users of oil companies and natural gas companies. ZECO has won the recognition of users around the world and long-term cooperation opportunities with its quality.

Description of 6 Inch Ball Valve:

ZECO Valve Group is a well-known ball valve manufacturer in China. Since its establishment in 1991, it has been producing ball valves for nearly 30 years. In the production process, ZECO regards each valve as a handicraft to keep improving. With the support of high-tech production equipment and high-tech personnel, each product can achieve international quality. ZECO has been a high-tech enterprise in China for many years. Every year, ZECO devotes itself to the research and development of valves with more efficient performance and longer service life. The research and development cost of ZECO accounts for nearly 8% of the company's sales cost.

Features of 6 Inch Ball Valve:

1. ZECO 6 inch valve is designed with an auxiliary seat emergency seal system.Once the soft seal seat is damaged, emergency sealing can be performed by injecting the appropriate sealant into the auxiliary seal system.Emergency seals can also be used to flush and lubricate seat areas as necessary to keep seat areas clean without affecting sealing.The stem also has an emergency seal design for emergency sealant filling and flushing lubrication;

2. ZECO 6 inch valve with fire protection construction.The fire protection structure of the 6 inch ball valve is designed in accordance with API 607. In the event of a fire, the metal seat will be immediately in contact with the ball after the soft seal seat burned, to prevent the valve leakage caused by greater impact;

3. ZECO 6 inch valve body wall thickness will have a certain amount of design, carbon steel body, seat, bottom cover are in accordance with ASTM B733 surface chemical coating. In addition, if the user needs special customization, ZECO also has a variety of anti-corrosion materials for selection to meet the working conditions;

4. ZECO 6 inch valve in order to prevent the maintenance of the valve stem because of the excessive pressure in the cavity and the phenomenon of flying out, there is a design to prevent flying out of the stem.

Description of 8 Inch Gate Valve:

The internal parts of ZECO 8 inch gate valve are made by the technology department to choose the most corrosion resistance and wear resistance of the material for production, to ensure that all kinds of corrosive medium in various pressure various temperature environment pipeline safety operation for a long time, of course, can also according to the actual needs of users and requirements for production, internal parts material ZECO can provide stainless steel internal parts, duplex stainless steel internal parts and low-temperature steel internal parts to meet the needs of different working conditions. For some special working conditions, ZECO can provide users with a complete set of pipeline valve solutions, so that users can leave the design of valve system to ZECO and deal with other pipeline problems by themselves.

Features of 8 Inch Gate Valve:

1. The handwheel of ZECO 8 inch gate valve is exposed for a long time, which may cause rust damage and need to be replaced. Considering this problem, ZECO designed the handwheel to be removable when the valve is fully open and ensured that the gate is in the open position. In addition, ZECO can also adopt painted handwheel to ensure anti-corrosion of handwheel;

2. ASTM A194 2H and ASTM A193B7 nuts and stud bolts for normal service conditions.ZECO provides ASTM A194 4 and ASTM A193B16 nuts and stud bolts or higher configurations if specified for use at high temperatures. ZECO stainless steel valves are furnished with standard bolts from ASTM A194 8 and ASTM A193 B8 nuts and studs;

3. The valve stem of ZECO 8 os&y gate valve is designed to prevent blow out of the valve stem, which is designed to prevent people from injury caused by flying out of the valve stem due to internal pressure problems when people need to replace packing or other parts with pressure in an emergency;

4. ZECO 8 inch gate valve can be produced to 150 ~1500 lb, safe and reliable.

A105 check valve Material:

ZECO Valve Group, founded in 1991 located in Shanghai, Yancheng, Wenzhou with focus on manufacturing wedge gate valve, through conduit gate valve, floating ball valve, trunnion mounted ball valve, top entry ball valve, globe valve, swing check valve, dual plate check valve and forged valve. Valve sizing 1/2" to 88", rating 150lb through 2500lb, served covering oil, gas, chemical, energy, refinery, LNG, LPG and many other fields. ZECO has excellent product quality managing system, certified by API 6D, CE/PED, ISO9001, ISO14001, ISO18001, WRAS, FM, TS and approved by oil & gas company. ZECO have long-term cooperation with China National Chemical Equipment Corporation (CNCE) and China Petroleum & Chemical Engineering Survey and Design Association(CPCESDA). As recognize the growing need, ZECO developed our own laboratory for research & development for product design innovation and vertification, which includes PT, MT, UT, FE test. ZECO is the humble and united team, to be more diligent and progressive to show the itegrity to our clients.