How does an air pinch valve work?

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A pinch valve is a 2/2-way valve designed to shut-off or control the flow of corrosive, abrasive or granular media. It utilizes pressurized air to open or close the valve. In the open position, the valve has no restrictions and allows a wide range of media to pass through the bore.

What is a pneumatic pinch valve?

Clippard’s NPP Series 2-Way pneumatic pinch valves are air-piloted devices designed to open or close tubes for controlling flow of liquids and gases. Other valve types have internal passages that may cause small amounts of fluid to remain in the valve.

What is the purpose of a pinch valve?

A Pinch Valve is an economical piece of equipment that works like a tap. It has an on/off function, to shut off, allow or control the flow of any media passing through it.

What are the advantages of a pinch valve?

Advantages

Low & easy maintenance.
Low weight.
No clogging or dead spots.
Compact, simple, robust & straight through design.
Very fast opening/closing times.
Less air consumption.
Self cleaning.
Permanent seal with tight shutoff.

Can you throttle a pinch valve?

Pinch valves, the simplest valve design, include any valve with a flexible elastomer body that can be pinched close to cut off flow, using a mechanism or fluid pressure. They are linear motion valves that can be used to start, stop and throttle media through a system.

Why are poppet valves used?

On gasoline engines, poppet valves are used to control the admission and rejection of the intake and exhaust gases to the cylinders. In the Figure (right centre), the valve, which consists of a disk with a tapered edge attached to a shank, is held against the tapered seat C by a compressed spring.

What is the difference between PSV & PRV?

While the term PRV is sometimes used interchangeably with PSV, there is a difference between the two. A PRV opens gradually in relation to the pressure, while a PSV is opened suddenly once the pressure hits a certain level in order to avoid overpressurization and a potential process safety incident.