The answer to problems of: corrosion, abrasion, clogging, contamination, vacuum & gas handling
G&O Check valves are designed to standards of maximum simplicity and efficiency. The valve body can be supplied, on indications from customers, to fulfill specific requirements in use.
Performance features
- Valves with most advanced designing features provide the ultimate in dependable, economic flow control
- Surface protection for ductile iron and cast steel Valves, Chlorine free prime coat with modified alkyd resin unobjectionable in physiological and toxicological respects. Additional external coating: Ename/Silver Streak aluminum paint
Disc & Plug materials
- ASTM A276 Type 410, 304, 316
- ASTM A217 CA15
- ASTM A216 WCB
- ASTM A351 CF8, CF8m, CF3, CF3m
- ASTM A395 PVDF, PPH
Body valve lining material
- Soft rubber
- Hard rubber (ebonite)
- Hypalon rubber
- ECTFE/HALAR
- Butyl rubber
- EPDM rubber
- Neoprene rubber
- PFA
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
- 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
- Triphase AC motor
Product features
- Simple three parts design for Non return Check valves, with only one moving part (disc), valve usable in vertical or horizontal plane.
- Light weight for Wafer type Check valves, bubble tight, low pressure loss. The eccentric shaft connection in combination with disc seat, guarantees a positive shut off of the returning medium.
- Light weight for Spring Loaded Check valve, short length, low pressure drop and positive shut off, achieved by unique spring loaded disc.
- Dual Plate and on-Slam Check valves are stronger, lighter and smaller than conventional swing check valves.
- Pressure Rating 7.0 bar, Class 150, 300, 600, 900, 1500, 2500
- Size from ½” through 6 4”
Body valve materials
- ASTM A126 CLASS C
- ASTM A395
- ASTM 1216 WCB
- ASTM A351 CF8, CF8M, CF3, CF3M
- ASTM A105
- ASTM A182 F11, F22, F5, F9, F304, F316
- PVDF, PPH
Gasket o-ring valve material
- Spiral wound 304, 316 with CAF
- Graphite
- PTFE filled
- EPDM (Other grades available on request)
- Compressed Asbestos free
Design/Testing applicable standard
- G&O STD
- API 594
- BS 5352
- API 6D
- API 598
Certificates available
- EN 10204 3.1.B
- EN 10204 2.2
- LP/MP TESTS
Maior markets served
- Chemical process
- Power generation
- Water treatment
- Mining
- Pulp & paper
- Nuclear
- Pharmaceutical
- Food & Beverage
- Sugar
- 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.