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pinch valve VA series
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Pinch Valves are the ideal solution for isolating and regulating abrasive, corrosive and fibrous products. The pneumatic pinch valve is being used more and more as an isolating valve or regulating valve for emulsions, sludges, dust, gaseous materials, compressed air, powder, granulates, pellets, etc. Air Actuated Pinch Valve offers a cost-effective solution to flow control problems. 

The actuation of the valve is accomplished by air or hydraulic pressure placed on the sleeve. The valve body acts as a built-in actuator, eliminating costly pneumatic, hydraulic or electric actuators. Adding air pressure within the annular space between the body and the sleeve can open, throttle or close the valve.

Air Operated Pinch Valve is characterized by a free flow of products because the nominal passage of practically all diameters is guaranteed. Advantages include minimum frictional resistance and non-clogging. Further advantages may be found in its lightweight and compact construction, which means pneumatic pinch valve is easy to install. Those are appreciated by our customers.

As the top 10 professional pneumatic pinch valve manufacturers and pneumatic pinch valve suppliers in China, JiaNai air operated pinch valve is advantageous because of their air and vacuum-tight seal, even with product flows containing solids. JiaNai pneumatic pinch valve is characterized in particular by an absolutely free flow of product, minimal air consumption as well as their extremely lightweight and compact design.
Pinch Valve VA 10-50 are made of food grade stainless steel material.
Product Highlights for Air Operated Pinch Valve  VA Series
Independent R & D
 Complete in specifications
 Durable
 Two-year warranty

Working Condition of Pneumatic Pinch Valve Video

VA Air Operated Pinch Valve Products

How Pneumatic Pinch Valves Work

When the control gas does not input into the pneumatic pinch valve, the cavity between the rubber sleeve and the valve body communicates with the atmosphere, and the rubber sleeve is in an outwardly tensioned state by the fluid pressure. Because there are reinforced plies arranged at a certain angle in the sleeve, the axial and radial pressures of the sleeve are balanced with each other, so the length and diameter of the sleeve will not change due to the fluid pressure. When the control gas enters the cavity between the sleeve and the valve body, the sleeve is deformed and intercepted under the control gas pressure.
When compressed air (pressure difference is 2 bar) enters the valve body of the pneumatic pinch valve, the specially-made inner liner with high resilience is compressed to produce a lip-type closure. This extremely increases the service life of the inner sleeve. In this case, the pneumatic pinch valve is closed, so that the medium flow can be shut down 100%. Its working pressure varies depending on the nominal diameter and ranges from 2-6 bar. When the compressed air is interrupted, the specially-made inner liner expands rapidly under the dual effects of its own rebound force and medium pressure, and then the valve is fully opened.

Advantages of Air Operated Pinch Valve

● Product flows naturally with low resistance
The pipe and valve have the same diameter, the structure is novel and simple. And the inner diameter of the rubber sleeve is the same as the pipe, and the local resistance is small. Therefore, the frictional resistance of the air operated pinch valve is extremely small, which will not affect the flow of medium in the pipeline, and it will not cause a blockage. In the nominal diameter range of various air operated pinch valves, the pipeline medium can be almost unobstructed.
● Good tightness and 100% leak-free
Air operated pinch valve series products have no sealing points, the control medium space is completely isolated from the valve channel, and no internal or external leakage will occur. The flat oval housing design ensures that the sleeve of the air operated pinch valve has a specified lip-folding pattern. This special lip-folding method ensures complete sealing of the product flow. Relying on the deformation of the rubber sleeve to achieve opening and closing, even if the fluid contains solid particles or fiber impurities will not block the closure. All things can be completely and quickly wrapped and closed, so the fluid tightly sealed.
● Wide range of application
Air operated pinch valves are the ideal solution for isolating and regulating abrasive, corrosive and fibrous products. It has a simple structure and a wide range of applications. The air operated pinch valve can be used in the pharmaceutical, food industry, chemical industry, pneumatic conveying system, pigment, and particulate matter processing, ceramics, and glass industry, plastic industry, suction device, batching system, filling and weighing device, exhaust, and ventilation system, etc. And it especially suitable for occasions with explosion-proof requirements.
● Long service life
The unique rubber sleeve with a reinforced cord can withstand high-frequency opening and closing operations. The air operated pinch valves are resistant to acids, alkalis and other chemicals, and have a long service life.
Wear-Resistant Natural

sleeves for air pinch valve

good resilience
long service life

Pinch Valve Body

Stainless steel corrosion-Resistant food-grade
High hardness
Beautiful appearance
Proper structure
Low gas consumption

Air Operated Pinch Valve Application

● Water treatment and sewage treatment industry: for a shut-off valve and/or control valve for limewash, suspensions, etc.
● Construction industry and plant engineering: for a shut-off valve for cement, concrete, sand, gravel, plaster, mortar, etc.
● Chemical industry: for dosing / isolating additives and fertilizers
● Plastics industry: for regulating, sealing and dosing granulates, powders, pellets, etc.
● Mining industry: for isolating and regulating during the extraction of minerals, ores, coal, etc.
● Air Drying Equipment
● Process Control Applications
● Laundry Equipment
● Textile Dyeing & Drying
● Bottling and Dispensing Equipment
● Ink and Paint Dispensing Equipment
● Industrial Compressors

Air Operated Pinch Valve VA Series

Stainless Steel Ferrule

Suitable for food industry

Stainless Steel Ferrule

Rust-proof stainless steel

Stainless Steel Ferrule

Acid and alkali resistant

Technical Specifications

Advantages of Woke Pinch Valve 
Woke pinch valve has smooth media and minimal frictional resistance  without any leakage nor blockage.
It is highlighted in its long service life, easy maintenance, and favorable price.
   Working Pressure
Maximum 5 bar (medium pressure)
Control Pressure
The effective working pressure is approximately +2.5-4.0 bar (closure pressure). If the control or closing pressure is too high, service life of the sleeve may be shortened. The pressure must be no more than 2.5-4.0 bar of the working pressure.
Differential Pressure
The control pressure is not greater than the maximum operating pressure of 2.5-4.0 bar; depending on the rated size and sleeve material.
Control Medium  
Compressed air, neutral gas, water (oil, please consult us before use)
Temperature Range
Each sleeve material has its own specific temperature range, allowing an ambient temperature of -20°C to +80°C.
Mounting Position 
It can be mounted in any position, and it is suggested the bulk goods be installed vertically. If installed horizontally, the control connection shall be installed upward.
Woke pinch valves are pressure control valves. If there is no pressure, they are normally open. If there is pressure, the valves will be closed.
Closing Features
Woke pinch valve is suitable for medium like sealing gas, liquid, solid and powder. A highly elastic sleeve can enclose any solid and does not guarantee tightness if the fluid consists primarily of particles.

Technical Parameters And Dimensions

Independent research and development · Durable
Independent research and development · Durable
Independent research and development · Durable
 Be sure to turn off the gas supply and disconnect the control gas before replacing the inner bushing, cleaning the pinch valve or performing any other operations.
 Be sure to keep the body, tools or other objects from the pinch valve when it is running.
Do not touch the pinch valve when the medium is transported at a high temperature. (There is a danger of causing burns)
 The pinch valve can only be disassembled when the device has been shut down and is in a no-pressure state.
 In order to prevent the maximum allowable working pressure/control pressure overload of the pinch valve, the equipment must be equipped with a pressure limiter and a safety valve.
 Unstable gas" can not be used as working medium.
 Please note that there is a possibility of static electricity (explosion hazard) depending on the application medium or the environment in which the pinch valve is applied.
 When selecting the pinch valve material, you need to consider not only the service life of the valve itself but also the driving components (such as gas circuit control, solenoid valve, etc.), because once the inner bushing is damaged, the medium may enter the control circuit.


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