Blogs/News/PSAs

Basic Information

This non slam check valve prevents backflow of media and reduces water hammer to achieve the safe and quiet effect.

Features

1. Small fluid resistance, large flow;
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2. Automatic control using medium energy;

3. Prevent water hammer phenomenon;

4. Slowly-closing silencing.

Principle

When the pipe supplies water from the inlet end of the valve, the water from the needle valve and one-way valve enters the valve cover control room and then is discharged downstream through the ball valve. Due to the small opening of the needle valve, the discharge speed of the control room is greater than that of the inlet to replenish water, thus reducing the pressure in the control room. The inlet pressure acting under the main valve disc all the time lifts the main valve disc, thereby opening the main valve disc and supplying water downstream. When the pipeline stops supplying water, the downstream water begins to flow back. Due to the effect of the one-way valve, the backflow water cannot flow out after entering the valve cover control room through the ball valve. As a result, the pressure of the valve cover control room increases gradually and the main valve disc is closed tightly.

Installation and Commissioning

Needle valve and ball valve adjust together to get the best opening or closing speed. For specific use, please consult ZhengFeng Valve Group.
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Product scope , Standards & Materials

Size Range: 2"~24"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2

Our renowned Klearfold® clear plastic boxes create strong visual impressions and are the ultimate way to showcase your products. They provide exceptional shelf presence and add stature to everything from a new product launch, to a special promotion, to the reinvigoration of a popular brand. A Klearfold plastic box is ideal for consumer electronics, sporting goods, gourmet food, housewares, personal care or cosmetic packaging applications.

Klearfold plastic boxes are available in a wide variety of materials and can be decorated to create just the right look using offset, flexo, and/or silkscreen printing, plus a variety of special effects. And our proprietary Soft Crease® scoring technology ensures that Klearfold plastic boxes have very uniform creases with less folding resistance, fold precisely, have clean lines and maintain their crisp shape.

As an plastic packaging manufacturer in China,Hlpklearfoldpvc will keep strive to offer you  plastic box packaging and transparent pvc box with high quality.

Wine cellar temperature and humidity control unit or wine cellar constant temperature and humidity machine, is namely called low temperature precision constant temperature and humidity air conditioner, commonly known as wine cellar machine. The unit principle is the same as that of ordinary air conditioners, but it has its own characteristics. It uses a low temperature compressor because the temperature requirements of the wine cellar are generally between 10 ° C and 18 ° C. The minimum air outlet temperature of an ordinary air conditioner is about 18 ° C, and the lowest indoor temperature reached is about 20 ° C, so it must be cooled by a low temperature compressor. The actual refrigeration temperature of the cryogenic compressor is approximately 0 °C-20 °C. The unit is equipped with a humidifier. Ultrasonic humidification and electrode humidification are usually used according to the power of the unit. A built-in water tank is connected to the humidifier. It has its own temperature and humidity control system.

The difference between the wine cellar temperature and humidity control units and the cold storage device is:

1. The wine cellar creates a slow and continuous low temperature and cooling, rather than a cold storage type of quick freezing. The temperature at the outlet of the cold storage equipment is too low and the temperature is lowered too quickly. Wines form large amounts of crystals when the temperature drops sharply.

2. The cold storage equipment will make the environment very dry while the temperature is drastically lowered, and the wine stopper will quickly shrink and cause leakage.

3. The wine cellar runs only slightly, and can't even hear the sound. The noise of cold storage equipment is usually very large, which is not conducive to the preservation of wine.

With the combination of lighting, image and data processing, the inspection automation system can detect and monitor the production process and product appearance damage, which guarantees the high quality of products.Visual inspection has been wildly use in many fields such as automotive, low voltage electrical, hardware, precision electronics and other fields. With many years of experience and abundant professional knowledge, Yiheda can design a complete visual inspection solution based on your needs.

Visual inspect system is produced in industrial automation. In modern industrial automation production, it involves a wide range of inspection, measurement and part identification applications, such as auto parts size inspection and automatic assembly integrity inspection, electronic assembly line component automatic positioning, beverage bottle cap printing quality inspection, bar code and character recognition on the product packaging. The common feature of this type of application is continuous mass production and high requirements for appearance quality. Usually this kind of work with high repetitiveness and intelligence can only be done by manual inspection. We often see hundreds or even thousands of inspection workers to perform this process behind the modern assembly line of some factories. While the factory adds huge labor costs and management costs, it still cannot guarantee 100% inspection pass rate, and today's competition between enterprises has not allowed even 0.1% defects. In some cases, such as accurate and rapid measurement of small size, shape matching, color recognition, etc., it is impossible to continuously and stably perform with the human eye, and other physical quantity sensors are also difficult to use. At this time, people began to consider to combine computer's rapidity, reliability, and reproducibility of the results with the highly intelligent and abstract capabilities of human vision, thus there is gradually forming a new discipline - Visual inspection.

Visual inspection is the science and technology that have research on using computers to simulate the macroscopic visual functions of living things. In layman's terms, it is to use machines instead of human eyes to make measurements and judgments. Firstly, the CCD camera is used to convert the ingested target into an image signal, which is transmitted to a dedicated image processing system, and converted into a digitized signal according to pixel distribution, brightness, color and the like; the image system performs various operations on these signals to extract the characteristics of the target, such as: area, length, quantity, position, etc.: Finally, it output results according to preset tolerances and other conditions, such as: size, angle, offset, number, pass/fail, presence/absence, etc. Visual inspection is characterized by automation, objectivity, and non-contact. Visual inspection emphasizes recognition and judgment, as well as reliability in an industrial field environment compared to image processing systems in general.

Visual inspection is a fairly new and rapidly developing field of research. From the 1950s, people began to study the statistical pattern recognition of two-dimensional images. In the 1960s, Roberts began research on 3D Visual inspection. In the middle of 1970s, MIT Artificial Intelligence Lab officially opened the "Visual inspection" course, and the research began to boom globally in the 1980s, Visual inspection has flourished, new concepts, new theories continue to emerge. Today, Visual inspection is still a very active area of research, with related disciplines include: image processing, computer graphics, pattern recognition, artificial intelligence, artificial neural networks, and more.

As a high-tech incubator, Xiongjin Biotechnology (Shanghai) Co., Ltd. has an independent enzyme preparation research and development team. It tracks the textile industry all the year round and specializes in the application of enzyme technology in the textile industry. The desizing enzyme WENATD-001 can decompose the mixed starch of starch, starch derivative and starch/synthesis slurry on the fabric, it can quickly convert the starch into dextrin, and reduce the viscosity so that it can be completely removed in the subsequent washing. The use of enzyme desizing can obtain the ideal effect of reclaiming the starch slurry without damaging the fabric and obtaining a good hand feel. The enzyme treatment ensures thorough and safe desizing.

Product info

Neutral Desizing Enzyme for Textile Advantages

1. It does not damage the fiber, with good hand feel, the color of the denim is bright and standard after desizing;
2. It can reduce the amount of chemical use
3. It can be used in both medium and high temperature conditions
4. It is suitable for the various starch and slurry desizing of denim and woven grey cloth

Neutral Desizing Enzyme for Textile Process Conditions

Process parameters Operating range Optimum range

Dosage 1 g/L ~2 g/L 1 g/L ~2 g/L

pH 5.0~7.0 7.0

Temperature 25℃~95℃ 50℃~95℃

Time 1min~1H Adjust according to vehicle speed, process and desizing rate

Neutral Desizing Enzyme for Textile Trait

Appearance: yellow or brown liquid (the color may vary slightly from batch to batch without implying the enzyme activity), slightly fermented smell.

Packing: Liquid 25Kg / barrel.

Storage: Store at 25 ° C or lower to extend shelf life. Please use it immediately after lid opened.

Neutral Desizing Enzyme for Textile Transport & Storage

This enzyme is a biologically active substance. It should be protected from exposure to direct sunlight and rain during storage and transportation. h2 light, high temperature and humidity will cause enzyme inactivation. Store at 25 ° C or less and the indicated enzyme activity is maintained for at least 6 months.

Neutral Desizing Enzyme for Textile Precautions

This enzymet is non-flammable and it is compatible with water. Avoid contact with the body or inhaling its dry powder. Accidental spillage or inadvertent contact with skin or eyes should be flushed immediately with water.

After-sales Service

For technical problems such as product performance and application, the company's technical service personnel will be glad to provide you with professional services.

In high melt wax for hot melt adhesives, wax is the most effective regulator of adhesive properties. The main function of the wax is to reduce the melting point and viscosity of the hot melt adhesive, improve the fluidity and wettability of the glue, improve the bonding strength, prevent the hot melt adhesive agglomeration, and reduce the cost. In the polyurethane and polyamide hot melt adhesives, there is no addition of wax. The other hot melt adhesives are composed of certain wax. However, if the amount is too much, the shrinkage of the adhesive becomes large, and the bonding strength is rather lowered. Therefore, in order to achieve a large bonding strength, the amount of the wax should be controlled. Commonly used waxes are paraffin waxes, microcrystalline waxes, PE wax and Fischer-tropsch wax. 

Alkane paraffin wax

the melting point 50-70 ° C, molecular weight 280-560. In corrugated board manufacturing, corrugated box molding, paper bag manufacturing and book binding,  paraffin wax are well applied in the EVA based hot melt adhesives and adjust the setting time,

Microcrystalline paraffin

the melting point 65-105 ° C, molecular weight 450-700, higher price, improve the flexibility, bonding strength, thermal stability and cold resistance of hot melt adhesives than alkane paraffin, but the anti-caking ability is lower than Alkane paraffin;

PE wax

has the good compatibility with ethylene/vinyl acetate copolymers and other hot melt adhesives. It has high melting points and high hardness, can Reduce the viscosity of the adhesive composition

Fischer-Tropsch wax

has the linear molecular structure with high melting point and low penetration. It has narrow melting range and good weather resistance. Therefore, it is widely used in applications requiring good weather resistance, high temperature and quick solidification.

In a large air-conditioned space, a large area of airflow can deliver the cold air to the entire space, and the temperature of the air conditioner can be set to be more than 3 to 5 °C without falling cold. The resulting electricity consumption directly reduces the user's production cost and objectively eliminates the carbon emissions of the power plant. In the large space heated in winter, through the reverse rotation of the factory ceiling fans, the hot air collected at the top is pushed to the ground, achieving the temperature balance of the entire indoor space and eliminating the huge waste of heat. Eliminating the amount of heating directly saves fuel, lowers the user's cost, and objectively eliminates the carbon emissions and pollution that occur in the boiler.

Large-scale workshops such as machine processing plants, automobile patching plants, aircraft assembly plants, shipyards, etc., accept the factory ceiling fans, and the wind is obedient and the wind speed is slow and stable. The factory ceiling fan not only makes the workers feel cold but does not blow the workpiece. The situation of tranquility can make people happy and the labor productivity is improved.

The use of factory ceiling fans in large-scale logistics stacking and distribution central :
Factory ceiling fans can improve the quality of the atmosphere, drive moisture and dehumidification, and prevent the corrosion of stored goods. It also enables employees to enjoy peace and quiet, and eliminate the slump rate of sending and receiving goods.

The use of factory ceiling fans in large-scale public construction such as，gymnasium, station, airport, etc.:
The factory ceiling fans can promote the smooth atmosphere, dispel the odor, create a peaceful shopping environment and increase sales.

Basic information

This valve is used as a two-way closed circuit device.

Features

1. No need for sluice Wells, which reduces the amount of installation work;

2. Does not affect the traffic, and underground parts of the integration, effectively prevent theft;

3. Stem has a special extendable structure, which can effectively prevent the ground from sinking;

4. Long life, no internal leakage.

Principle

This underground gate valve uses the form of pin coupling to transfer the sensor force existing in the gearbox and transmission shaft buried in the ground. The telescopic drive rod is extended until it is installed in the underground bonnet. This layout and approach ensure that work is done properly and efficiently.

Installation and Commissioning

Connect the valve with the water supply pipe, extend the expansion drive rod to the set height, tighten the expansion limit device to maintain the extension height, backfill the pipe groove, tamp and make cement pier foundation, put the valve box plate on the cement foundation, place the valve box cover, lay the road surface and make the valve box cover equal to the road surface. For specific use, please consult ZhengFeng Valve Group.

When production volumes don't justify the investment in injection molding tools, our patented Klearfold Keeper clear packaging system offers distinctive structural designs, similar to InSight, but at less cost. The Klearfold Keeper clear packaging system consists of a clear plastic sleeve that's designed to lock to a vacuum-formed tray or clear plastic clamshell. Vac-trays and clamshells are fabricated to conform to the shape of the product and to the desired cross-sectional package profile.

Klearfold Keeper offers easy and efficient hand-filling… the product is loaded into the vac-tray and the sub-assembly slides into the clear plastic sleeve. In-folded tabs on the sleeve engage a specially designed flange on the vac-form, locking the two components securely together, without the need for wafer seals or the use of sonic, RF, or heat sealing equipment.

A thumb-notch perforation in a corner of the clear plastic sleeve provides a unique, easy-opening feature. Removing the thumb-notch also removes the lock, allowing the tray to be easily disengaged from the clear sleeve.

US Patent Number: 8,936,188

As one of the plastic box manufacturers in China,Hlpklearfoldpvc will keep strive to offer you  plastic sleeve packaging and other custom plastic box with high quality.

The wine contains a certain amount of pigment, which is easily affected by ultraviolet rays to cause pigmentation and discoloration of the liquor. Red wine contains protein and salt, which precipitates at low temperatures and causes turbidity in the wine. Deterioration and turbidity caused by microbial growth is likely to occur at high temperatures. Temperature controlled fermentation produces heat in the red wine manufacturing process. If the control of the wine refrigeration units is not added, the fermentation temperature must exceed 40 ° C (104 ° F).

Different types of wine have different temperature requirements, as follows:

1. White wine: It is made by peeling white grapes or red grapes. It can be sweet and unsweetened. For unsweetened white wine, the serving temperature is 10~12 °C. The sweet liquor is served at a temperature of 5 to 10 °C.
2. Red wine: It is fermented from red grapes. The taste is not sweet, but sweet. Its drinking temperature is 14~20 °C. However, the light red wine produced in the French wine region is suitable for drinking at 12~14 °C (chiller refrigeration).
3. Rose wine: It is made from red grapes, but the juice and the peel are mixed together for a shorter period of time, so the color is lighter. The drinking temperature is 10~12 °C (cooling unit cooling and cooling storage).
4. Champagne sparkling wine: Champagne is made from "natural fermentation" in 2 bottles, which produces carbon dioxide. It can be used alone or with a starter or seafood. It is also an indispensable beverage for festive parties. Its serving temperature is 5 ° C -10 ° C.

Thenow will strive to offer you necessity of refrigeration with good quality.

production line conveyor belt are used for product conveying. There are different types of the conveyor, which can be used for conveying various kinds of products.
automatic conveyor for industrial automation is a device designed to transport raw materials, semi-finished products or products in order to improve the efficiency of processing or production. The products can be conveyed from one place to another. There are a large number of different types of conveyors designed to convey different types of products or perform specific tasks. Yiheda can provide you with customized conveyor.

The functions of feeding mechanism of CNC lathe

The functions of feeding mechanism of CNC lathe: The automated feeding manipulator of NC lathe can imitate some movement functions of the human hand and arm, and is used to grasp and carry objects or operating tools according to fixed procedures. It can replace the heavy labor to achieve mechanization and automation of production, and can operate in harmful environment to protect personal safety. The automated feeding manipulator of NC lathe is usually used as an additional device of machine tools or other machines, such as loading and unloading and transferring work pieces on NC lathe.

The use of CNC machine tools instead of manual labor can save costs, improve efficiency and reduce the rate of defective. At the same time, it liberates the labor, makes the tedious work flow simple and easy to operate, and greatly reduces the labor cost.

What is the assistant manipulator? What is the purpose of the assistant manipulator?

What is the assistant manipulator? It is a new kind of auxiliary equipment used for labor saving in material handling and installation. It skillfully applies the balance principle of force to form a gravity-free floating state of materials in the air, that is, the gravity of materials is balanced by the corresponding control system, so that the operator can balance the movement and positioning of materials in space only by pushing and pulling the materials.

The assistant manipulator balances the gravity of the object through the thrust or pull force generated by the cylinder to achieve the assistant effect. By detecting the end fixture of the sucker or the manipulator and balancing the gas pressure in the cylinder, it can automatically identify whether there is a load on the manipulator arm of the manipulator, and automatically adjust the air pressure in the balancing cylinder through the pneumatic logic control loop to achieve the purpose of automated balance. When working, heavy objects are suspended in the air to avoid collision between products.

Basic knowledge of the belt conveyor

The basic knowledge of the belt conveyor is mainly divided into: daily maintenance knowledge, conveyor limitations and conveyor operation rules.

First, what are the daily maintenance of belt conveyor?

1. check whether the belt is starting.
   2. check whether spring is loose or deformed and replaced.
   3. check whether the motor has abnormal sound.

Second, what are the limitations of the belt conveyor?

The gradient of belt, the length of conveying material, the nature of conveying material, the width of belt, the running speed of belt, etc.
In addition, there will be special belts for different materials; for example, the belt with bucket slope can be close to 90 degrees, and the gradient of pattern belt can also be relatively large.

Third, what departments are widely used in belt conveyors?

Large ones for coal and mining; small ones for electronics and electrical appliances, and some for chemical industry, tobacco, plastic, etc.
There are also food industries, such as biscuits, bread and so on. The belt conveyor is only one kind of conveying equipment. Conveying equipment is widely used in industries, such as automobiles, household appliances and so on.

Four, operation rules of the belt conveyor

1.The fixed conveyor should be installed on a fixed basis according to the prescribed installation method. Before the formal operation of the mobile conveyor, the wheel should be wedges with triangular or brake. In order to avoid moving in the work, there should be a one-meter channel between the machine and the machine, and between the machine and the wall when there are several conveyors working in parallel.
2.Before using the conveyor, it is necessary to check whether the running parts, belt buckles and carrying devices are normal and whether the protective equipment is complete. The tightness of the tape must be adjusted to a proper level before starting.
3.The belt conveyor should start at no load. After the operation is normal, the material can be fed. No feeding before driving.
4. When several conveyors are connected in series, they should start from the unloading terminal and start in sequence. After normal operation, the material can be fed.
5. When the tape runs off during operation, stop and adjust it, so as not to use it reluctantly, in order to avoid wearing edges and increasing load.
6. The working environment and the temperature of the delivered material must not be more than 50 degrees centigrade and less than -10 C. It is not allowed to convey materials containing acid and alkali oils and organic solvents.
7. No pedestrians or passengers are allowed on the conveyor belt.
8. Before stopping, the conveyor must stop feeding before stopping the material on the belt.
9. The conveyor motor must be well insulated. Cable of mobile conveyor should not be dragged or dragged. The motor must be grounded reliably.
10. When the belt slips, it is strictly prohibited to pull the belt by hand to avoid accidents.

What are the advantages of automated loading and unloading?

There are three main advantages of automated loading and unloading.
(1)High production efficiency: To improve production efficiency, we must control the production rhythm. Except that the fixed production and processing rhythm can not be improved, automated feeding and unloading replaces manual operation, so that the rhythm can be well controlled, avoiding the impact of human factors on production rhythm, greatly improving production efficiency.
(2)Flexible process modification: We can quickly change the production process by modifying the procedures and gripper fixtures. The debugging speed is fast, and the training time for employees is not needed, so it can be put into production quickly.
(3) Improve the quality of work pieces: Use robot automated production line. From feeding, clamping to blanking, it is totally completed by robots, which reduces the intermediate links and greatly improves the quality of parts, especially the work piece surface is more beautiful.

Mesothermal Alpha Glucoamylase is extracted by Bacillus any breach No.BF7658 after liquid culture and fermentation, which can efficiently catalyze the hydrolysis of starch. This product is applicable to the "liquefaction" process of industries such as glucose, caramel, alcohol, beer, monosodium glutamate, rice wine, liquor, and antibiotics. It can also be used in the "desizing" process of the textile industry. Shingenzyme is one of the reliable glucoamylase suppliers from China.

Product info

Mesothermal Alpha Glucoamylase Components

Mesothermal Alpha Glucoamylase, Stabilizer, Dispersant

Specifications/Physical and Chemical Characteristics

Appearance requirements: dark brown liquid preparation, allowing a small amount of precipitation, the smell of normal microbial fermentation products.

PH (25 ℃): 5.5 to 7.0

PH value suitable for the use of the enzyme: the optimal pH value is 6.0-6.5, and the inactivation is severe below 5.0.

Density: 1.25 g/mL or less

Enzyme activity: > 2000u/mL

Effect of temperature: suitable for 85-90 ℃, instant liquefaction

Stability of calcium ions: calcium ions have a protective effect on it.

Mesothermal Alpha Glucoamylase Health Indicators

Heavy metals (Pb)% less than 0.004

The total number of colonies CFU/mL is less than 50000.

Coli group MPN/100mL is less than 3000.

Mold CFU/mL is less than 200.

Salmonella should not be detected.

Definition of Enzyme Activity

Under the condition of 60 ℃ and pH6.0, 1 g of solid powder enzyme hydrolyze casein within 1 minute to produce 1 mu g enzyme tyrosine as a unit.

Mesothermal Alpha Glucoamylase Packing

Carton or non-toxic polyester bag packaging, 25kg/ bag (box)

Mesothermal Alpha Glucoamylase Storage

Store in a dry place with low temperature to avoid high temperature.

Period of Validity

25 ℃, 6 months, you can keep the enzymatic activity 90% or higher.

Mesothermal Alpha Glucoamylase Usage

6-10u/g starch raw material.

Safety Matters

Enzymes are proteins that can cause allergies or allergic reactions in certain people. Prolonged contact may cause discomfort in the skin, eyes, and nasal mucosa. Therefore, any overflow, even a small overflow should be cleaned up in time. Wash the enzyme solution immediately on the skin or eyes with water and seek guidance from a specialist.

Micronized wax powder

Characterization
Outside view: white powder
Density: 0.93g
Melting point: 120 C
Average particle size: 5um

Characteristic:

1. Ultrafine modified micronized wax powder provides excellent scratch resistance and excellent extinction, transparency and handle. 

2. It has a small particle size, good dispersion, and good anti-caking property.

3. It can significantly reduce the stacking phenomenon in the offset printing process. Scope of application:

Solvent-based wood coatings system, ink, industrial baking varnish, polyester baking varnish additions:

For 0.5-2% of the total amount, please test the optimum dosage before using due to the different system.

Storage:

Micronized wax powders should be stored in a cool and dry ventilated place, sealed in containers, away from fire sources and heat radiation for a maximum storage period of 2 years.

Comparing the quality of imported and domestic polyethylene wax, there are the following differences:

1.Different molecular weight. The molecular weight distribution (MWD) of imported polyethylene wax is about 5 (the ratio of Mw to Mn), while that of domestic wax is about 10. Therefore, the quality of the color masterbatch is affected.

2. Imported polyethylene wax has different modification methods, so it can be used in different plastics (engineering plastics, rubber, etc.) and different pigments (powder coatings) to have better dispersion, internal and external lubrication, and achieve the excellent demoulding effect.

3. Imported polyethylene wax has less ash (impurities).

The big air industrial ceiling fans belong to a kind of ceiling fan which is produced by utilizing the dynamics of ambient air. It is highly praised by users in the market. The reason is that professional big air industrial ceiling fans aggregate various advantages and can effectively provide ventilation for a variety of different venues. Let's take a look at the main reasons for the popularity of the big air industrial ceiling fans.

First of all, this big air industrial ceiling fan is cost-effective and energy-saving. Although it is a high-tech ceiling fan, the design of energy-saving and environmentally friendly materials will not be too high in price, and the low speed will not cause users to consume high power. Moreover, it has a long life, so it is more cost-effective and more popular with users.

Then, the big air industrial ceiling fans run very smoothly and are safe to use. All kinds of fasteners are one-piece installation. Moreover, this ultra-large energy-saving ceiling fan can run continuously for a long time, improving the space environment for users. It does not cause the motor to overheat and malfunction due to long running time. The ceiling fan itself has a cooling function, and the low speed operation does not cause too much heat, so users are willing to choose.

InSight is an award-winning transparent packaging system that combines clear plastic sleeves and injection molded plastic end caps to produce a very distinctive clear package. It has a patented locking feature, where die-cut tabs on the clear plastic sleeves engage undercuts molded into the end caps to join the components securely together. End caps can be designed to lock permanently to the plastic sleeve or to twist off easily.

The shape of the end caps determines the package' s cross-sectional profile; therefore, InSight clear packaging can be designed in a nearly endless variety of profiles, including "cat's eye", oval, round, rectangle, square, and trapezoid.

US Patent Numbers: 7,000,775; 7,644,823; 7,374,048

As one of the plastic box manufacturers in China,Hlpklearfoldpvc will keep strive to offer you  clear plastic tubes with end caps or clear plastic tubes with caps with high quality.

MVHR (Mechanical Ventilation with Heat Recovery) provides fresh filtered air into a building even as retaining most of the power that has already been used in heating the building. Heat Recovery Ventilation is the solution to the ventilation wants of energy efficient buildings. Mechanical air flow with warmth restoration (MVHR), warmth restoration ventilation (HRV) or Comfort air flow are all names for the identical thing. A heat healing air flow device precise outfitted into a residence gives a regular grant of fresh filtered air, maintaining the air high-quality while being virtually imperceptible.

MVHR works quite really via extracting the air from the polluted sources e.g. kitchen, bathroom, toilets and utility rooms and presenting air to the ‘living’ rooms e.g. bedrooms, dwelling rooms, studies etc. The extracted air is taken thru a central heat exchanger and the warmness recovered into the grant air. This works both ways, if the air temperature inner the building is chillier than the outdoor air temperature then the coolth is maintained in the building.

Thenow will strive to offer you hrv mechanical system with good quality.

With the development automation technology, automatic welding technology is more advanced. Automatic welding machine plays an important role in the application of various industries, and its application is expanding rapidly. In the modern industrial production, the mechanization and automation of the welding production process are the inevitable trends of the manufacturing industry. The automatic welding machine we provided, with more efficient, high welding precision and fast welding speed, can be widely used in many fields.

In the past 20 years, with the development of digital, automation, computer, mechanical design technology and the importance of welding quality, automatic welding has developed into an advanced manufacturing technology, and role automatic welding equipment plays in various industrial applications is more and more important, and the scope of application is expanding rapidly. In modern industrial production, the mechanization and automation of the welding production process is an inevitable trend in the modernization of the automatic welding system industrial electronics. 

According to the degree of automation, automated welding equipment can be divided into the following three categories:

1.Rigid automated welding equipment Rigid automatic welding equipment can also be called primary automatic welding equipment, most of which are designed according to the principle of open loop control. Although the entire welding process is automatically completed by the welding equipment, the feedback of the welding parameters during the welding process cannot be closed-loop feedback system, and the possible deviations cannot be randomly corrected. 

2. Self-adaptive control automatic welding equipment The adaptive controlled welding equipment is a highly automated welding equipment, which is equipped with sensors and electronic detection lines, it can automatically guide and tracks the weld trajectory, and implements closed-loop feedback control of the main welding parameters. The entire welding process will be completed automatically according to preset procedures and process parameters.

Intelligent automatic welding equipment

It utilizes a variety of advanced sensing components such as vision sensors, tactile sensors, auditory sensors and laser scanners etc., and it makes uses of computer software systems, databases and expert systems with functions such as identification, judgment, real-time detection, calculation, automatic programming, welding parameters storage and the ability to automatically generate weld log files. 

The composition of automated welding equipment:

1. Welding power supply, its output power and welding characteristics should be matched with the welding method to be used, and the interface connected with the main controller is installed.
   2. wire feeder and its control and speed control system, for the wire feeder with higher requirements on wire feed speed control accuracy, its control circuit should add speed feedback
   3. The welding machine head uses its moving mechanism, which consists of a welding machine head, a welding head support frame, a hanging type carriage, etc., and is used in a precision welding head mechanism. The drive system should adopt a servo motor equipped with an encoder.
   4. Weldingmovement or displacement mechanism, such as welding roller frame, head and tail frame turning machine, rotary platform and position, etc., precision moving position mechanism should be equipped with servo motor drive
   5. Weldingclamping mechanism
   6. The main controller, also known as the system controller, is mainly used for linkage control of each component, control of welding procedures, setting, adjustment and display of main welding parameters. Control functions such as troubleshooting and man-machine dialogue can be expanded as necessary.
   7. computer software, computer software commonly used in welding equipment includes: programming software, functional software, process software and expert systems, etc.
   8. welding head guiding or tracking mechanism, arc pressure automatic controller, welding gun yaw and monitoring system
   9. Auxiliary devices, such as wire feeding system, circulating water cooling system, flux recovery and conveying device, wire holder, cable hose, drag chain mechanism structure design and electrical control design these three parts.
   10. Welding robots, also known as robotic arms, are an important part of automated welding equipment. Its main tasks include: welding, cutting, thermal spraying, carrying etc..

Application and value of automatic welding equipment in all-position welding

First, the automatic welding equipment is applied in the all-position welding, and the welding execution part is driven by the rotary pair to flexibly and reasonably change the posture of the welding torch, which is beneficial to the all-position welding work. At the same time, the motor power can be reduced while driving the same welding actuator. In the application, it is better to install the sensor at the welding position on the final stage deceleration shaft to detect the position of the welding gun. With this installation method, the control precision obtained is relatively high. In addition, by means of this memory on the automatic welding equipment, the parameters of the welding process and the weld tracking control program are stored, and the welding process parameters are stored in the arc welding power source, so that the advantages of the arc welding power source are further exerted. Through the cooperation of the two, it effectively solves various quality problems that may occur in all-position automatic welding operations.

Secondly, the driving of the welding torch is carried out by means of a stepping motor (the stepping motor is an open-loop control element stepping motor part that converts the electric pulse signal into angular displacement or line displacement). The digital input pulse model is effectively converted into a rotary motion by this motor. The accuracy of the component itself is high, and there is neither drift problem nor problems such as accumulated error. The application of this component in all-position welding not only keeps the rotational speed unchanged, but also controls the frequency signal to be relatively stable, and the torch displacement is more accurate.

Thirdly, in the all-position welding operation, the welding head and the arc welding power source are organically combined, which not only can achieve the purpose of full-position automatic welding, but also can reduce the price of the automatic welding equipment to a certain extent. In this way, not only can automatic welding be achieved, also the semi-automatic welding can be carried out by means of the arc welding power sources and the utilization of the semi-automatic welding torches.

Beta mannanase enzyme is a kind of hemicellulase that can hydrolyze β -1N 4 mannoside bond at random. The improved Pichia pastoris is refined by liquid-deep fermentation and post-treatment. β -mannanase enzyme can degrade mannan-a bifidobacterium growth factor. β -mannanase is widely used in food and feed industry, papermaking and petroleum mining industry.

Product info

Definition of Enzyme Activity

the amount of enzyme required to release 1 μ mol reducing sugar per minute from a solution with concentration of 3mg/mL (Sigma G0753) at pH of 5.5 ~ 37 ℃ is a unit of activity (U).

Mannase Appearance

Powder: light yellow powder, good fluidity 40 mesh screening rate≥90%, dry weight loss ≤10%

Liquid: Brown or light yellow liquid, density 1.1-1.2 g / ml

Beta Mannanase Enzyme Specification

Liquid: 30 kg / barrel, 200kg / barrel, 1000kg / barrel

Powder: 25kg / bag

Enzyme activity: 20000u/g(mL)；50000u/g(mL)

Special packaging specifications or enzyme activities can be customized according to customers' needs.

Mannase Features

Advanced production technology: high mannanase enzyme activity, good stability and uniformity;

High efficiency of enzymatic hydrolysis: It uses genetic engineering technology to improve fermentation strains and decomposes mannan and high efficiency.

The optimum range of pH is wide: the optimal range of pH is 3.0-7.0, which accords with the physiological characteristics of animal intestine;

h2 resistance: It is tolerant to protease, acid and granulation temperature, more suitable for using in feed.

Mannase Efficacy

It can transform Mannan into Mannan Oligosaccharide with health function, improve animal immunity and reduce the use of antibiotics. It can raise the utilization rate of energy for poultry and poultry, increase the uniformity of poultry production, and reduce differences. It can improve the nutritional value of grain feed such as soybean meal to make it more efficient. It can reduce the incidence of poultry and promote the healthy growth of animals.

Mannase Usage

When this product is used, it should be mixed with a small amount of pre-mixed feed first, then amplified step by step, and then added to the feed.

Adjust the formula: Adding this product can reduce the amount of 50-100kcal/kg in the feed formula and reduce the formula cost.

Mannase Note

1.Storage and transportation: This product is a bio-active substance. It can avoid exposure to rain, h2 light, high temperature and humidity during storage and transportation. It should be stored below 25 ℃and the labeled enzyme activity can be maintained for at least 6 months.

2. Note: This product is not combustible and can be safely mixed with water. Avoid contact with the body or inhalation of dry powder. Flush or accidentally contact with skin or eyes should be rinsed immediately.