Difference between revisions of "Air Operated Pinch Valves"

===Fluids===

Pinch valves used for fluids usually employ a device that directly contacts process tubing. Forcing the tubing together will create a seal that is equivalent to the tubing's permeability.  

===Solids===

The most important benefits of using air operated Pinch Valves are their complete and true full bore, and the 100% tight shut off – even on solids such as granule, powders, pellets, chippings, fibres, slivers, any kind of slurries and many more aggressive products.  

===Examples===

Air operated Pinch Valves are used in:

* Vacuum conveying systems  

* Vacuum and compressed air control units

==Particulates==  

Major components of a pinch valve consists of body and a sleeve. The sleeve will contain the flow media and isolate it from the environment hence reducing contamination to the environment. Generally used for slurries or processes with entrained solids, because the flexible rubber sleeve allows the valve to close droptight around solids—solids that would typically be trapped by the seat or stuck in crevices in [[Globe Valves|globe]], [[Diaphragm Valves|diaphragm]], butterfly, gate, or ball valves.  The sleeve material can be selected upon the corrosiveness and abrasiveness of the flow media, a suitable synthetic polymer can be chosen. A pinch valve may be the best type of valve for flow control application if the operation temperature is within the limit of the polymer.   

== Function ==   

The air operated Pinch Valve works without any additional [[Actuators|actuator]]; all it needs to close or operate is 30 psi air or  

2-6 bar supply into the Pinch Valve body. As soon as the air supply becomes interrupted and the volume of air exhausts, the elastic rubber hose starts to open due to its great impact resilience.   

== Advantages==  

Usually conventional valves such as [[Ball Valves]], [[Butterfly Valves]], Piston Valves or [[Gate Valves]] tend to fail when in process with the above mentioned aggressive products. The reason is that the valve body seat or the gate/piston of the valves wears out too quickly and the valve can no longer shut off tightly, whereas air operated Pinch Valves work without almost any wear of the elastic rubber hose because the kinetic energy of the solids are absorbed through the extremely high elasticity of the rubber. The rubber mixture is also anti abrasive.   

== Used Materials ==  

===Sleeve===

* Neoprene

* Butyl

===Housing===

Different housings and end covers/flange materials such as:

* Plastics

* Stainless steel

==Industries==

Air operated Pinch Valves are being commonly used in a wide range of many different industries such as:   

* Glass industry

* Plastic industry

==Maintenance==

Quick and simple replacement of all sleeve types of the air operated Pinch Valves with the assistance of detailed fitting instructions for them is reflected in the very low maintenance costs.

== Video ==

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