Air Operated Pinch Valve by LIANKE

Air operated pinch valve GJ841X-II

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. Main of components Body, sleeve, Stem, pinch rod, side guide rod, Hand wheel etc. Working principle […]

Air operated pinch valve GJ841X-I

Main of components Body, sleeve, Stem, pinch rod, side guide rod, Hand wheel etc. Working principle 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 […]

FAQ

How do air-operated pinch valves handle abrasive materials?

Air-operated pinch valves excel with abrasive materials since only the elastomer sleeve contacts the media. Because the valve body isn’t exposed to abrasive particles, wear and tear risk is reduced. The sleeve accommodates solids, slurries, and corrosive fluids without clogging.

What maintenance is required for air-operated pinch valves?

Air pinch valves need minimal maintenance. You just have to monitor the elastomer sleeve condition. If signs of wear or leaks appear, the sleeve warrants replacement. Also, regular air supply checks maintain consistent valve function.

Can air-operated pinch valves be used in vacuum applications?

Yes, air-operated pinch valves perform well in vacuum settings. The flexible sleeve ensures an airtight seal, even under negative pressure. Provided the elastomer sleeve suits the vacuum specifications, these valves handle vacuum duty seamlessly.

What air pressure is needed to operate a pneumatic pinch valve?

Standard operating range is 2-6 bar instrument air pressure. Required pressure varies with valve size and process conditions. Larger valves or higher process pressures need higher actuation pressure.

How fast does an air operated pinch valve respond?

Typical response time is 2-3 seconds for full stroke. Speed can be adjusted using flow control valves on air supply. Emergency shutdown applications can achieve closure in under 1 second.

What happens to the valve position on loss of air supply?

Spring return actuators automatically move to fail-safe position (normally closed or normally open) upon air failure. Double acting actuators maintain last position without spring return.

Can air operated pinch valves be used for control applications?

Yes, when equipped with positioner and control accessories. Provides reliable throttling control with typical accuracy of ±2% of span. Suitable for both on-off and modulating service.

What are the common solenoid voltage options for air operated pinch valves?

Standard solenoid valves are available in 110VAC, 220VAC, 24VDC configurations. Explosion-proof solenoids with various certification options (ATEX, IECEx) can be supplied for hazardous area installations.

Can air operated pinch valves handle vacuum service?

Yes, with appropriate sleeve selection and reinforcement. Special sleeve designs with vacuum support rings prevent sleeve collapse under vacuum conditions up to -0.9 bar. Must specify vacuum service requirements during valve selection.

How does maintenance compare to manual pinch valves?

Additional maintenance points include actuator seals, air connections, and control accessories. However, automated operation reduces mechanical stress on sleeve, potentially extending sleeve life compared to manual operation.

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