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|Body:||Cast Iron, Ductil Iron||Standard Or Nonstandard:||Nonstandard|
|Flange End:||ANSI 16.5||Size:||2“~48”|
|Media:||Slurry,Dry And Wet Type Dust||Rubber Material:||NR, CR, NBR|
air actuated pinch valve,
electric pinch valve
Red Valve Regulating Open Body Pinch Type Control Valve For Mining
Our control pinch valves, designed to control abrasive and corrosive slurries, has a reinforced sleeve as the only wetted part of the valve.
There is no need for packing, valve seats and mechanical parts. A choice of controls is available including pneumatic, electro-pneumatic and “smart” positioners.
Pinch Valve Working Mechanism
Having the simplest valve design, pinch valves comprise of a flexible elastomer body that obstructs the flow of media through the pinching mechanism of the rubber sleeve, which is the main working element. The rubber sleeve is pinched closed either by the application of fluid pressure or mechanically in the body. It is squeezed at the valve’s mid-section, clamping or pinching its walls together to tightly close the flow path.
Pinch valves are controlled through a linear motion method. In its simplest form, the valve may comprise of a length of elastomer tube equipped with a mechanism of pinch bar, providing a closure in order to stop and prevent from over-pinching of the tube. The pinching mechanism is typically carried out by a molded rubber tube that is placed inside a body. This can be done through a simple screw operated working principle, where the pinching action is achieved from only one side of the tube. It may also be possible that a differential screw is used for controlling two pinching mechanisms that are working in vertical opposition to one another.
|Full Borre||The sleeve diameter remains constant from inlet to outlet port.|
|Double Wall||This wall gives more protection at cost effective and simple design for highly abrasive applications.
|Cone||Design for control applications. By reducing the center section of the valve sleeve, it is possible to achive the required flow coefficient (Cv, Kv) of the valve.
|Reduced Port||As cone sleeve, the flow coefficient of the valve fits control application.
|-Variable orifices||These orifices are designed for high-turndown control application. They also help avoid cavitation.|
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