Type: Rubber lined control diaphragm valve Design & Manufactured to API 6D, ASME B16.34 or Equivalent P.T Ratings to ASME B16.34 Face to Face dimensions to ASME B16.10 Flanged Ends to ASME B16.5 Butt-weld Ends to ASME B16.25 Threaded Ends to ASME B1.20.1 Socket-weld Ends to ASME B16.11 Valves Marking to MSS SP-25 Inspect & Tested to API 598 Size Ranges from 1 1/2” thru 24” Pressure Ratings from Class 600 to Class 2500, PN110 to PN420 Structures in Bolted or Pressure Sealed Union Cover Ends Connections in Flanged R.F or RTJ, Threaded NPT, BSPT, Welded S.W, B.W and Grooved Body Materials available in Cast Carbon Steel, Low Temp. Carbon Steel, Alloy Steel, Stainless Steel, Monel, Alu. Bronze etc. Trim Materials available in 13%Cr, F11, F22, SS304, SS304L, SS316, SS316L and other specials.
Rubber lined diaphragm valve is a special form of block valve, which appeared in the 1920s. Its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving parts, so it is called diaphragm valve. Its most prominent feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, valve disc and other parts above the diaphragm are not corroded by the medium, the packing sealing structure is omitted, and there is no medium leakage.
Characteristics of rubber lined diaphragm valve
The most prominent feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, valve disc and other parts above the diaphragm are not corroded by the medium, the packing sealing structure is omitted, and the medium leakage will not occur.
1. The diaphragm made of soft seals such as rubber or plastic has good sealing performance. Since the diaphragm is a vulnerable part, it should be replaced regularly according to the characteristics of the medium.
2. Limited by the diaphragm material, the diaphragm valve is suitable for occasions with low pressure and relatively low temperature.
3. Diaphragm valves can be divided into house type, direct flow type, cut-off type, straight through type, ram type and right angle type according to their structural forms; The connection form is usually flange connection; According to the driving mode, it can be divided into manual, electric and pneumatic. Among them, pneumatic drive is divided into normally open, normally closed and reciprocating.
4. Generally, it is not suitable for pipelines with temperature higher than 60 ℃ and conveying organic solvents and strong oxidizing media, nor for pipelines with high pressure. The diaphragm valve is 1.3 × The valve used to open or block the air flow in the fluid system of 10-5 ~ 2.5x106pa.
We focus on valves in standard and special materials as customer request. Our main materials show as the follows: Any request for other materials, please contact our machinery sales or engineering team on email.
Titanium or Titanium alloy series
Nickel alloy series
Monel 400,Monel k500
Zirconium alloy series
Bronze alloy series
Nickel aluminum bronze C95800
(Super) Duplex Steel
Other corrosion resistance
Alloy 20,AISI 321,310,904L
Alloy Material (Low Temperature)
Alloy Material (High Temperature)
Dimensions of Rubber lined control diaphragm valve
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