Diaphragm Valves

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Diaphragm valves (or membrane valves) consists of a valve body with two or more ports، an elastomeric diaphragm، and a "weir or saddle" or seat upon which the diaphragm closes the valve.

Diaphragm Valves

Flosteer ‘A' weir Diaphragm Valve having rugged design to incorporating the best material available is proved by easy، smooth and maintenance free operation for a long time. Extra heavy-duty casting affords high resistance to atmospheric corrosion. Flosteer diaphragm valve reduces diaphragm travel for extended service and fine control.

A wide choice is available for body materials، body rubber lining، types of operation and body end connection to satisfy the need of most industrial application. High quality standards are strictly maintained، each valve being checked for size، design pressure، operation، MOC، finish etc and with in house painting.

Flosteer offers diaphragm valves with various body elastomers lining like P.T.F.E.، Ebonite، Neoprene، EPDM، Hypalon & Butyl and others on request.

Flosteer also can supply diaphragm valve with Pneumatic Actuator / Pneumatic Cylinder for ON-OFF or control operation along with accessories like Solenoid، Limit Switch، Air Filter Regulator، Valve Positioner، I/P Converter etc.

PTFE Lined Diaphragm Valve || Rubber Lined Diaphragm Valve

Standards :

Design Standard

BS 5156

Inspection & Testing Standard

BS 6755

Face To Face

As Per ANSI B 16.10

End Connection

Flanged End To ANSI B 16.5/BS 10 Table

Socket Weld End To ANSI B 16.11

Butt weld End To ANSI B 16.25

Screwed End To ANSI B 1.20.1

Size Range

1 1/2" To 12"

Pressure Rating


Nomenclature :

Body / Bonnet / Compressor

IS 210 GR. FG 200/220/250/260


ASTM A 351 GR. CF 8/CF 8M/CF 3/CF 3M


Hand Wheel

Cast Iron/Ductile Iron/Bakelite


AISI 410/304/316/304L/316L


Neoprene/Hypalon/Butyl/EPDM/Nitrile/Buna-N/Food Grade With P.T.F.E. Pad

Body Lining

Neoprene/Natural/Ebonite/EPDM/P.T.F.E. (FEP/PFA)/FRP، Food Grade

Rubber Lining Thickness :

15 to 65 mm valve. 3 mm

80 to 100 mm valve. 3.5 mm

125 to 150 mm valve. 4.0 mm

200 to 350 mm valve. 5.0 mm

PTFE Lining :

Thickness - 3mm


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