Ddiaphragm Valves

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Product Description

The answer to problems of: corrosion, abrasion, clogging, contamination, vacuum & gas handling

G&O Diaphragm valves do not incorporate any stuffing box and are leaktight on all liquids, slurries, granular materials, powders, pastes, gases, acids, etc…

Diaphragm (internal membrane) is supported during opening and closing, and is easily replaceable without any special tools. The wide range of available elastomer materials enable an appropriate selection for each application and is a guarantee of perfect resistance to corrosion and abrasion.

Sanitary type valves are recommended for ultimate sterility in pharmaceutical and biotechnology industries. Using perfectly contoured self-draining stainless steel bodies and PTFE faced diaphragms, resulting in valves totally free of bacteria traps.


PERFORMANCE FEATURES

• Long diaphragm life: no metallic inserts to strain the elastomers

• Low pressure loss

• Diaphragm supported during opening and closing: hence the possibility of under vacuum operation

• Quick and easy replacement of diaphragm

• Epoxy painted, valve bodies protected with an anti-acid varnish


BODY VALVE LINING MATERIALS

• Soft rubber

• Butyl rubber

• Hard rubber (ebonite)

• ECTFE/HALAR

• PFA

• ETFE

• Galvanized (laid in a hot zinc bath)

MATERIAL DIAPHRAGM

• Natural rubber

• White natural rubber

• Neoprene

• EPDM

• Viton

• Butyl

• Nitrile

• Hypalon

• Silicone

• Neoprene/Silicon (mixed)

• PTFE faced

END CONNECTIONS APPLICABLE STANDARD

• ANSI/ASME B16.5 Flanged Valves

• ANSI/ASME B16.1 Flanged Fittings

• ANSI/ASME B1.20.1 (NPT) Pipe Threads

• ANSI/ASME B16.34 Steel Valves

• ANSI/ASME B16.11 Socketweld Fittings

• MSS SP-88 Diaphragm Valves

• ANSI/ASME B16.25 Buttweld Ends

INSPECTION TESTS AVAILABLE BY

• SGS GLOBAL TRADE SOLUTIONS

• ITS INTERTEK TESTING SERVICES

• BV BUREAU VERITAS


OPTIONS

• Limit switches

• Solenoid valve

• Position indicator

• Air fitter regulator

• 3:15 PSI positioner

• 4:20mA electropneumatic positioner or 4:20mA electronic transmitter of position 30°-90° angle

• Mono/Triphase AC motor (240V/50Hz through 400V/50Hz)


PRODUCT FEATURES

• Weir type, conveyed flow way – Full bore type, straight through way

• Sanitary type

• Flanged valves sized from ½” through 1 4”

• Sanitary type (buttweld, screwed, tri-clamp, socket) sized from ½” through 4”

• Manual, pneumatic and electric operators


BODY VALVE MATERIALS

• Cast Iron GG20 or GG25 (UNI ISO 185/UNI 5007) as per ASTMA126

• Ductil or spheroidal cast iron GS40/12 (UNI ISO 1083/UNI4544) as per ASTM A536

• Cast steel WCB (A216M-93) as per ASTM A216 WCB

• Carbon steel LCB as per ASTM A352

• Stainless steel 316 (A743M-98) as per CF8M

• Pure aluminum

• PVDF, PPH


BODY EXTERNAL & INTERNAL SURFACE

(for sanitary type only)

• Satin or Vacuublast finished for external

• Vacuublast, Satin, Mirror or Supermirror finished for internal


DESIGN/DIMENSIONS APPLICABLE STANDARD

• BS 5156

• DIN 3202 F1


CERTIFICATES AVAILABLE

• EN 10204 3.1.B

• EN 10204 2.2


MAIOR MARKETS SERVED

• Chemical process

• Power generation

• Water treatment

• Mining

• Pulp & paper

• Nuclear

• Pharmaceutical

• Food & Beverage

• Bioprocess


G&O SERIES PNEUMATIC ACTUATORS

Piston type air operators line offer a great solution to a wide range of actuation situations. They are exclusively designed to G&O series butterfly valves and can be mounted in any position. These actuators are built in aluminum and are available in three options:

• single effect acting – fail to close (air to open)

• single effect acting – fail to open (air to close)

• double effect acting – fail to open & fail to close

Single effect acting actuators are fitted by an extractable handwheel for security.


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