Air operated pinch valve is a type of valve designed to control the flow of various media, including corrosive, abrasive, and granular substances. It operates using compressed air to pinch a flexible elastomer sleeve, effectively stopping or regulating the flow.
Body, sleeve, Stem, pinch rod, side guide rod, Hand wheel etc.
when rotate the handle clockwise, valve stem drive the splint and compress sleeving to close valve, conversely, open the valve. So splint under the pull rod upper and downer to complete the work, because of the rubber sleeve can not sustain heavy strength, so when close it, operator feel a little collide is be ok, forbid to use other tools;
This valve can install on the pipe for free, no fluent direction limit, long term usage, if there is abrasion or leaks, just to remove the valve to replace a new valve core, the valve can use for a long time for economical and practical.
A.Could install it in any part of pipe and don’t limit of the medium flow direction.
B.Low maintenance cost, don’t need change the seat of valve, sealing material etc, only need change the rubber of sleeving.
A.Pinch valves can be used for On/Off, as well as throttling services
B.Pinch valves are ideal for on/off services because of their straight through design that allows for uninhibited flow
C.Straight through designs also have very little pressure drop between the inlet and outlet.
D.The effective throttling range of a pinch valve is usually between 10% and 95% of the rated flow capacity
E.Low maintenance
F.Low weight and easy operation
G.Easy changing the rubber sleeving and don’t need stock other parts except the rubber sleeving.
| Rubber quality | Application examples | Temperature range | Typical media |
| EPDM | Chemical applications: Applicable to 75% of all industrial chemical applications. | -40℃ – ＋110℃ | Concentrated and oxidiziing chemicals. |
| NR | High wear applications. | -40℃ – ＋80℃ | Abrasive materials, diluted acids, alkali & chemicals. |
| NBR | Applications involving oils, fats and hydrocarbon. | -30℃ – ＋100℃ | Oil, fats, fuels hydrocarbon, lubricants. |
| CR | Special-purpse chemical application: Resilient to ozone and averse weather | -40℃ – ＋100℃ | Chemicals, acids, several solvents, aliphatic oils, fats, lubricants |
| IIR | Special-purpse chemical application: Impermeable to gas | -40℃ – ＋100℃ | Concentrated and acidic chemicals, vegetable oil. |
| Name | Material |
| Body | Cast iron, Cast steel, Stainless steel |
| Sleeve | NR, EPDM, NBR, CR, IIR |
| Acceptable other special requirements of the material | |
| DN | PN(Bar) | L | H | D | K | N-L |
| 40 | 1-16 | 190 | 85 | 145 | 110 | 4-18 |
| 50 | 1-16 | 210 | 95 | 160 | 125 | 4-18 |
| 65 | 1-16 | 250 | 115 | 180 | 145 | 4-18 |
| 80 | 1-16 | 300 | 130 | 195 | 160 | 4-18 |
| 100 | 1-16 | 345 | 185 | 215 | 180 | 8-18 |
| 150 | 1-10 | 500 | 245 | 280 | 240 | 8-23 |
| 200 | 1-6 | 545 | 270 | 335 | 295 | 8-23 |
| 250 | 1-6 | 560 | 285 | 395 | 350 | 12-23 |
| 300 | 1-4 | 706 | 365 | 440 | 400 | 12-23 |
Air-operated pinch valves consist of a valve body and a flexible sleeve, making them one of the simplest valve designs available. This simplicity allows for easy installation and maintenance.
The valve's design eliminates the need for costly hydraulic or electric actuators, as the valve body itself acts as a built-in actuator. This results in lower operational costs and reduced complexity.
When compressed air is supplied to the valve, it compresses the sleeve, creating a tight seal that stops the flow of media. The valve can also be easily opened by releasing the air pressure, allowing for unrestricted flow.
The only wetted part of the valve is the rubber sleeve, which can be easily replaced when worn. This low maintenance requirement contributes to a lower total cost of ownership over time.
No pressure loss, no clogging, no leakage, and waterproof hammer impact.
It is especially suitable for liquid-solid and gas-solid two-phase flows containing particles. Rubber tube sleeve with fiber reinforced structure, wear-resistant and fatigue-resistant technical parameters
Valve body: cast iron DN25~200
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