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A Pinch Valve is a two-way valve that is designed to control or shut off the flow of corrosive, abrasive, or granular media. It uses compressed air to open and close the valve. The valve has no restrictions in the open position and allows a wide range of media such as an aluminum oxide to pass through the bore. The valve's flexible internal rubber sleeve isolates the media from the rest of the valve, preventing contamination and damage to the valve's other components. Figure 1 depicts a pneumatic pinch valve.
With slurries and granular products like abrasive garnet sand, cement, gravel, textile fiber, carbon, powder, pellets, chipping, and glass fragments, pinch valves are well suited for use. These valves are desirable in a variety of industrial applications because they are affordable, dependable, and simple to use.
The housing, sleeve, and end connections are the pinch valve's three main parts. The only part that comes into contact with the media is the rubber sleeve, which is installed into the housing from the inlet to the outlet. To support and connect to the valve, the end connections are bolted, screwed, or threaded at each end.
Pinch valves can be mechanically or automatically operated with a sand blasting machine. A mechanical pinch valve is a multi-turn valve, which means that it opens and closes by turning the handwheel more than 360 degrees. The valve is typically in the open position. The valve stem lowers as the handwheel rotates. The pinch valve's sleeve is pinched tightly and the flow is stopped when a pinch bar is applied to the middle of the sleeve. Another mechanical pinch valve design has a bottom-up rising and lowering pinch bar.
An automatic pinch valve is powered by a solenoid, hydraulic fluid, or compressed air. Although the three automatic pinch valve types have slightly different operating mediums, the outcome is the same. A pneumatic pinch valve tightens the center of the sleeve by using the air compressor. A hydraulic pinch valve accomplishes the same thing with hydraulic fluid. Finally, a plunger that pinches down the sleeve is moved by an electric current under control by a solenoid pinch valve.
Particles can become trapped around the ball or disc and clog conventional valves like a ball valve and remote control valve. But when the pinch valve opens, the rubber sleeve of the device closes over and traps the particles, allowing them to pass through the system.
The elastic rebounding characteristic of the rubber sleeve, combined with the force of the upstream flow, fully opens the valve when pressure is no longer applied to it. The fully opened valve allows the media to flow freely, preventing clogging or blockage of the valve.
Because of their elegant designs, pinch valves have the following advantages:
Excellent with corrosive and abrasive media
Straight flow path and no media clogging
Minimal friction and turbulence
Prevents microbial contamination of media
Low maintenance costs and simple rubber sleeve replacement
Superior sealing abilities
Brief times for opening and closing
A minimal energy footprint
Rubber sleeves on sanitary pinch valves are made of nitrile, EPDM, and natural rubber, all of which have received FDA approval for use in contact with food. A pinch valve also cycles quickly, which greatly improves packaging effectiveness.
The applications of the chemical industry are numerous. Because there are so many different materials that can be used to make pinch valve sleeve production, pinch valves can handle many of these applications.
In order to handle solids and bulks, pinch valves provide the necessary abrasion resistance. Solids cannot clog the valves because of their full-bore opening.
We are a worldwide leading pinch valve manufacturer and we offer commercial goods to customers and clients everywhere. With a user-friendly website that enables you to order all of your industrial supplies and ships them quickly anywhere in the world, we work to live up to our motto, "We Simplify Industrial Supply." Ambica Enterprises strive to become a leading manufacturer of all industrial products, our product line includes air operated shot blasting machine, airless shot blasting machine, sand blasting helmet, sand blasting nozzles, sand blasting hose, remote control valve, thermal spray gun, arc spray gun, metalizing wire and abrasive media like steel shots, glass beads, aluminum oxide, silicon carbide, copper slag, plastic media and so on.