The highly-elastic, air operated pinch valve sleeves shut off the product flow with a 2-3bar differential pressure supply (depending on elastomer quality) and then moves back to the open position without being driven because of its great rebound resilience, once the pinch valve body has been bled.

Due to its simple structure, MVI's air operated pinch valve represents a particularly low cost and economic shut-off valve solution, because a separate drive is not required for actuating them. In fact, only a 3/2-way solenoid valve or pilot valve is needed to control them.

Due to its very simple structure they are extremely easy to maintain, they can be repaired or serviced directly on site at the customer's with the aid of installation instructions.

air actuated pinch valve for testing

Air operated Pinch Valve

The solution for isolating and regulating abrasive, corrosive and fibrous products such as granulates, powder, pellets, dust and liquids containing solids, etc.

How do air operated pinch valves work?

Supplying compressed air (minimum pressure difference 2 bar) into the casing of the air operated pinch valve compresses the sleeve, which is specially manufactured with high rebound elasticity. The body's design guarantees that the sleeve can close freely to form a lip shape. This ensures that the product flow is completely sealed off tight and that the sleeve is guaranteed the longest service life at the same time. This closes the air operated pinch valve and completely seals off the flow of the product.

The maximum operating pressure is dependent on the nominal diameter and is around 2-6 bar. As soon as the supply of compressed air is interrupted and the air operated pinch valve casing is vented or drained, the specially manufactured sleeve is opened by its rebound elasticity, enabling the pressure in the medium to flow through the full passage of the air operated pinch valves.

What are the benefits of air operated pinch valves?

Free flow of product, minimum frictional resistance, 100% leak free, no blockages and low net weight are among the most important benefits of air operated pinch valves.

A flattened and elliptical casing design of all flanged types ensures minimum compressed air consumption. This results in energy savings and ensures a specified, lipped fold pattern to the sleeve of the air operated pinch valve. This lipped fold pattern ensures the complete sealing of the product flow. Even large solids are enclosed by the sleeve in the air operated pinch valves and are thus tightly sealed.

Inflatable Pinch Valves

Maintenance of air operated pinch valves:

Simple and rapid replacement of the rubber sleeve with the assistance of detailed fitting instructions for the pneumatic pinch valves is reflected in the very low “total cost of ownership” maintenance costs.

Controlling an air operated pinch valve

We recommend fitting a quick exhaust valve directly to the control connection of the pinch valve. By doing this, the pinch valve will open quickly and regardless of the size and distance of the pilot valve. 

                        Air operated pinch valve application