Weir Type Pneumatic Diaphragm Valves are with Features and Specifications as below:
Features: Flange PN10/16 (520) or ASA150 (530) Cast Iron Body Unlined
Materials: Bronze, cast Iron, ductile iron, stainless steel, carbon steel and various plastics Size Range: DN15-DN200 Operation: Pneumatically actuated: Single acting/ spring return and double acting, Hydraulically actuated single acting spring return and double acting. Connections: Hygienic connections, bsp, npt, ANSI B16.5 RF, flat face and RTJ ASA125 / ASA150 / ASA300, BS10 table D / E / F / H, BS4504 PN6 / PN10 / PN16 / PN25 Other options: Weir and striaght through patterns, glass, PTFE / PFA, hard rubber ebonite linings, diaphragm range includes butyl, ETFE / PFA / PTFE, natural rubber and neoprene, also available from stock are hygienic valves, lockable options, atex complient actuation. Specification
Design & manufactureBS 5156 API 6D Face to Face dimensionANSI B16.10 API 6D EN 558 Flange connection dimensionANSI B16.5 EN 1092 Nominal pressure150 lbs PN10-16
Main part list material Part nameMaterial Body:Cast Iron Cast steel Stainless steel Bonnet:Cast Iron Cast steel Stainless steel Stem: Stainless Steel Compressor: Cast Iron Cast steel Stainless steel DiaphragmEPDM PTFE Nitrile
Pneumatic diaphragm valve is combined with diaphragm valve and pneumatic actuators. It compressed air-driven, realized the adjustment of process of fluid flow in pipe. Because of adopt corrosion resistant lining by the body and corrosion resistance of the diaphragm on the structure, no filler letter structure, throttling components as the resilient diaphragm, vale body smooth flow. The pneumatic film diaphragm valve has small yin force, large flow without leakage and convenient and reliable advantages of fire and explosion protection. It widely used in industrial automation system of strong acid , strong alkali corrosion, high viscosity, containing grain and fiber, and toxic and not with however, give the pollution medium flow regulation.
Characteristics of pneumatic diaphragm valve: *The biggest difference between the diaphragm and other valves is :adopt the no filler letter structure, rubber diaphragm can make the flow of corrosive medium and all drive parts n the fully isolated state, thus eliminating valve such shortcomings as run, leakage, drops, etc. *Because of the diaphragm valve smooth flow, flow resistance small, so can acquire larger flow. *Rubber lined diaphragm valve of the body cavity surface have PTFE and other materials to choose from a variety of rubber so has excellent corrosion resistance characteristic. *This valve is combined with body, bonnet, disc, stem, the diaphragm and other valve parts. *The opening and closing which achieved by rotating the hand wheel and in the top cover marked can see the valve in the closed or opened position with display color which indicating valve opening and closing. When you placed the hand wheel clockwise, the hand wheel is slow down, the disc drive with the decline of the diaphragm which making pathways truncation. Otherwise, the valve is open , the color then revealed.
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