Selection guide for pinch valves, introduction to pinch valves

The parameters required by the user for the selection of the automatic pinch valve are as follows:

Switch type: 1) Nominal diameter of pipe.

2) Working pressure and working temperature.

3) Casing material (as specified by the owner or designer).

4) Media information includes: medium composition, particle size, especially the composition of corrosive chemicals, and the selection of casing material.

5) The density of the medium.

6) On-site air pressure.

7) Turn off the On time requirement (if any).

8) Whether there is a valve position feedback requirement.

Regulated: In addition to the above basic conditions, it is also required.

1) Flow rate (maximum minimum) - i.e. the range of flow control.

2) The pre-valve pressure at the maximum and minimum flow rate.

3) Pressure behind the valve at the maximum and minimum flow rate.

As long as the manual valve has basic information (pressure, medium, temperature), it can be selected, and the more complete the automatic valve conditions, the better, and the more accurate the selection.

This article analyzes the selection of the lower pipe pinch valve in detail, if you think it is helpful to you, please raise your noble hand and give a thumbs up to the American Weidun VTON valve.

The explanation of the pipe pinch valve is as follows: the imported pinch valve, also known as the pinch valve, also known as the pinch valve, pressure pipe valve, air bag valve, hoop break valve, etc. The casing is squeezed by pneumatic, electric, manual or hydraulic driving methods to achieve the effect of switch adjustment.

Imported pipe pinch valve has been widely used in the world, and the selection is very important, so this article introduces the selection of the lower pipe pinch valve in combination with the sample of the imported pipe pinch valve of Vton of the United States.

First, according to the role of the selection;

According to the function, it can be divided into two categories: switching type and regulating type.

Second, according to the drive mode selection;

It can be divided into: manual pinch valve, imported pneumatic pinch valve, electric pinch valve, hydraulic pinch valve. Taking the American Weidun VTON brand pipe pinch valve as an example, the most common ones are imported pneumatic pinch valve and imported manual pinch valve.

3. Select the inner liner according to the pipe pinch valve;

The rubber casing of the inlet pipe pinch valve is the core component, which is usually composed of an inner layer, an outer layer and a reinforcing fiber, which is formed by a vulcanization and secondary vulcanization process. For example, the American Vodun VTON brand uses the style of industrial standardization and refinement to make the service life of each inner bushing more outstanding. Common inner bushing materials are:

Natural rubber, fluorine rubber, neoprene, EPDM, nitrile, food grade rubber, neoprene rubber, etc.

Fourth, the caliber of the pipe pinch valve, medium pressure and temperature:

1) Pinch valves are mainly used in medium and low pressure environments, and high-pressure pinch valves are also provided by several imported brands. The medium pressure of the imported pipe pinch valve of the American Weidun VTON brand can reach 40bar.

2) Because the inlet pipe pinch valve is a valve with a rubber casing as the core, the use temperature is limited, usually within -40 200.

3) Limited by the rubber process, under the premise of satisfying the quality and strength of the casing, the manufacturing diameter of the pinch valve is usually within DN300mm. The large-diameter pinch valve is relatively high, and there are very few manufacturers who can manufacture it. At present, the pinch valve of the American Vedun VTON brand can reach DN1000.

Pipe pinch valve. It is also known as hose valve and squeeze valve. Rely on manual, electric, pneumatic and other actuators to squeeze the internal rubber liner, so as to achieve the effect of switching or adjusting.

According to the mode of action of the valve, the type is selected: switch type, adjustment type.

According to the parameters of the pipeline conveying medium, the rubber liner material is selected. According to the different parameters of the medium: liquid or particles, corrosivity, temperature, etc., the rubber material liner suitable for the item is selected.

According to the material, the rubber liner is divided into: natural rubber, EPDM rubber, nitrile rubber, hydrogenated nitrile rubber, styrene-butadiene rubber, neoprene rubber, butyl rubber, fluorine rubber, Hypalen, food grade rubber, etc.

Here are some well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Chaoda, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Pinch valve (pinch

Valve), also known as pipe pinch valve, airbag valve, hoop break valve, etc. in China. The casing is the most important part of any pinch valve and is the heart of the pinch valve, providing resistance to corrosion, wear and pressure. The quality of the pinch valve depends on the quality of the casing.

The casing is squeezed by pneumatic, electric, manual or hydraulic driving methods to achieve the effect of switch adjustment.

Pipe pinch valves, also known as hose valves, can be used in mining, chemical, pipeline equipment and other industries to play the role of switching or adjusting. There are pneumatic, manual, electric and other drive modes. The rubber spool is squeezed by the actuator to realize the opening and closing of the valve.

In the open position, the valve is fully open and there is no flow limit. During closing, two clamping levers press the valve sleeve against the centerline. The valve sleeve is abrasion resistant, and when the solid particles hit the rubber surface of the valve sleeve, the valve sleeve absorbs energy, and when the valve sleeve rubber returns to shape, the energy is released.

Even if solid debris accumulates on the sleeve wall, any crystalline particles will detach from the sleeve surface and flow away with the medium when the sleeve is squeezed, allowing the heavy-duty pinch valve to achieve a hermetically sealed seal. The valve's full-bore construction ensures a free flow of media. The structure and material of the three main components of the valve (valve sleeve, valve body and actuator) can be selected according to the process conditions.

Pipe pinch valve is a new type of valve, relying on its own structural advantages, when reaching the service life, only need to replace the rubber liner, without the replacement of any metal parts, you can get a new pipe pinch valve, with a high cost performance!

Combined with the wear-resistant, corrosion-resistant, high-temperature and other characteristics of the rubber itself, it can perfectly solve the on-off control and flow control of some abrasive and corrosive solids and liquids containing particles, powders, fibers, slimes, etc.

With its unique structure and material advantages, the pipe pinch valve has a wide range of application prospects in mining metallurgy, chemical process control, petrochemical industry, pulp and paper industry, energy industry, pneumatic conveying and other industries.

Diagram of the working principle of the pipe pinch valve:

The imported pipe pinch valve is a special type of valve, although the shortcomings are obvious, such as low pressure resistance, low temperature resistance, but he also has many advantages, this article describes the advantages of the imported pipe pinch valve in detail, so that readers can better select and apply the imported pipe pinch valve.

Imported pipe pinch valve, also known as hose valve, rubber sleeve valve, because the valve core part of the valve is made of hose, its tightness, corrosion resistance, wear resistance are far more than metal valves, widely used in smelting, mining, electric power, chemical, pharmaceutical, starch, papermaking, food, brewing and other industries. Taking the widely used imported pipe pinch valve brand American Weidun VTON as an example, its excellent sealing performance and durability in harsh environments have incomparable advantages, which is the trend of medium and low pressure valves.

1) Scientific design: low flow resistance, no blockage, no gap and dead angle hinder the operation of the valve, the hose can wrap it in the middle when the medium has residual particles, especially the pipe pinch valve of the American Vton can achieve zero leakage shut-off;

2) The control is very convenient: you can operate according to your specific requirements, and you can carry out automatic control on the spot or from a distance;

3) Strong wear resistance and corrosion resistance: rubber is far more wear-resistant than steel, iron and other metal materials, and the adjustment of the formula can resist the corrosion of various chemical solvents, so it is especially suitable for the pipeline transportation control of particle slurry and chemical media;

4) Excellent sealing: there are rubber flanges at both ends of the hose, when the valve is connected with the pipeline, there is no need to add another sealing gasket, and the valve channel and the control medium space are in a completely isolated state, and there will never be internal and external leakage, so as to eliminate the undesirable phenomena such as running, rising, dripping and leaking;

5) Good cold resistance: because the fluid medium flows in the elastic hose, the shell freeze and cracking caused by fluid crystallization are excluded;

6) Simple installation and operation: in the process of valve installation, there is no directionality and no confusion; Bi-directional sealing and bi-directional installation can be realized.

7) Long service life: It has a high-quality rubber tube sleeve with reinforced cord, so it can withstand any high-frequency opening and closing operation; For example, the imported pipe pinch valve of Vton can achieve a service life of millions of times.

8) Reasonable structure: If the rubber sleeve of the pipe pinch valve is found to be damaged, its structure can realize the rapid replacement of the rubber sleeve, which is convenient for maintenance and easy to operate;

9) Low maintenance cost: as long as the hose is replaced during maintenance, the valve body and other mechanisms can be used for a long time, which greatly saves the user's production cost. Moreover, the full diameter of the pipe pinch valve is unobstructed, non-scaling and self-cleaning, so that the pipeline does not need to be manually cleaned, and the maintenance cost is low;

10) Wide range of uses: can replace diaphragm valves (easy to scale, often block the official road), gate valves (closed loosely, easy to leak), globe valves, regulating valves, can resist a variety of medium concentration of acid and any concentration of alkali salt solution, can transport slurry, dry and wet powder and crystalline object media. Different media can be equipped with hoses with different rubber formulations to meet the production needs of different users.

The advantage of this is that the cost of imported pipe pinch valve is relatively low, and it is cheaper than diaphragm valves, gate valves, regulating valves, and globe valves.

Pipe pinch valves are also known as hose valves, airbag valves, etc. in China. The pipe clamp valve is composed of the valve body shell and the internal hose, and the casing is squeezed through pneumatic, electric, manual, hydraulic and other driving methods to achieve the function of switch adjustment. The pipe pinch valve has the characteristics of full diameter of unobstructed flow channel, which can be integrated with the pipeline system, and can still be closed with zero leakage when there are residual particles, without gaps and dead angles, and does not hinder the opening and closing of the valve.

At the same time, the maintenance cost is low, the design is simple, and it is not affected by the harsh external environment. The internal hose of the pipe pinch valve is made of rubber, so it has the advantages of wear resistance and corrosion resistance, so it is widely used in mining, chemical industry, metallurgy, power plant, wastewater discharge and other industries.

The pipe pinch valve, also known as the solenoid pipe pinch valve, is driven by an electromagnetic solenoid, and the switch is controlled by squeezing and loosening the hose. It is suitable for medical, chemical and environmental protection industries and is used for the discharge of waste liquid. Since the waste liquid (which is corrosive) does not pass through the valve body, only through the hose, it is economical and only necessary to replace the hose.

Pipe pinch valves can be divided into manual pinch valves, pneumatic pinch valves, electric pinch valves, and hydraulic pinch valves

Wuhu Naide tips.