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  • Q What are the materials of the valve body produced by JIA NAI pneumatic pinch valves?

    A The valve body material of pneumatic pinch valve produced by JIANAI company is POM, aluminum alloy, stainless steel and other materials.

  • Q What kind of rubber is used in the inner bushing produced by Jia Nai Pneumatic Pinch Valve?

    A Natural rubber

  • Q How long is the service life of an air-operated pinch valve?

    A
    The service life of an air-operated pinch valve generally depends on the pinch valve sleeve. This depends on numerous factors and operating conditions such as the control/closing pressure, the media/operating pressure, the operating temperature and the operating medium. 

    Unfortunately, no general statement can therefore be made about the service life. However, our sales team has rich practical experience and can  estimate the service life based on information on all of the usage details for each pinch valve size and design; simply contact us with your usage details and we will be able to provide you with a rough estimate of the service life for your application.

  • Q According to which Standard or DIN were the air-operated pinch valves manufactured?

    A The air-operated pinch valves are subject to Pressure Equipment Directive 2014/68/EU and fall under various categories depending on their nominal width and valve size.

  • Q What happens when the compressed air fails?

    A If compressed air in the housing escapes, then the air-operated pinch valve opens.

  • Q How about are air-operated pinch valves gas-tight?

    A The flow through the air-operated pinch valves is "waterproof" (drip-proof) when the differential pressure supply is sufficient. At the customer’s request, we offer a flow tightness test with a protocol in accordance with DIN EN 12266-1 P12 leak rate A. The air-operated pinch valves are generally hermetically sealed from the outside.

  • Q What is the control pressure of pneumatic pinch valve?

    A 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.

  • Q What is the differential pressure of pneumatic pinch valve?

    A 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.

  • Q What is the operating temperature range of pneumatic pinch valve?

    A Each sleeve material has its own specific temperature range, allowing an ambient temperature of -20°C to +80°C.

  • Q Can I replace the sleeve for your air-operated pinch valves myself at the site?

    A Yes, the sleeves for the air-operated pinch valves can all be replaced on location without special tools.

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