Diaphragm Valve Stainless Steel 1 Inch Dn25 Pn10 Rf Flanged Pneumatic Operator ASTM A351 CF8 Pneumatic Diaphragm Valve
Key Specifications / Features
DN25 PN10 Pneumatic Diaphragm Valve, RF, Stainless Steel.
Type Diaphragm valve
Nominal Diameter DN25
Nominal Pressure PN10
Construction Bolted Bonnet; Fluorine Lining Trim
Design & Manufacture GB12239-89
F to F Dimension JB1688
Flange Dimension GB 4216.4/HG 20592
Test & Inspection GB/T 13927
Body Material ASTM A351 CF8+F46
Disc Material ASTM A351 CF8
Diaphragm Material F46+NR
Temp. Range ≤150℃
Media Corrosive Media
Weir-type diaphragm valves:
The weir-type diaphragm valve is one of the most common designs available. The raised lip/saddle design is best suited for small flow control and is kept leak-proof thanks to the bonnet over the diaphragm and actuator. This design is optimal for dangerous or corrosive liquid and gas, as any failure with the membrane will be kept contained by this bonnet.
Diaphragm Valves Information
Diaphragm valves get their name from a flexible disc which comes into contact with a seat at the top of the valve body to form a seal. A diaphragm is a flexible, pressure responsive element that transmits force to open, close or control a valve. Diaphragm valves are related to pinch valves, but use an elastomeric diaphragm, instead of an elastomeric liner in the valve body, to separate the flow stream from the closure element.
Diaphragm Valve Function
The diaphragm is connected to a compressor by a stud molded into the diaphragm. To start or increase flow the compressor is moved up by the valve stem. To stop or slow flow, the compressor is lowered and the diaphragm is pressed against the bottom of the valve. Diaphragm valves are excellent for controlling the flow of fluids containing suspended solids and offer the flexibility of being installed in any position. Weir-type diaphragm valves are better at throttling than straight though diaphragm valves because the design's large shutoff area along the seat gives it the characteristics of a quick-opening valve. The diaphragm acts as the gasket of the valve to seal against leaks between the body and bonnet cap.
The straight through type can be used in situations where the flow direction changes within the system. The body of this design has a flat bottom that is parallel to the flow stream. This allows the flow to move uninhibited through the valve with no major obstructions. A flexible material is required for the diaphragm so that the mechanism can reach the bottom of the valve body; this can shorten the life span of the diaphragm. They are excellent for use with sludge, slurries and other viscous fluids but they are not well suited for high temperature fluids.
Keywords of Diaphragm Valve Stainless Steel 1 Inch Dn25 Pn10 Rf Flanged Pneumatic Operator ASTM A351 CF8 Pneumatic Diaphragm Valve
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