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CHECK VALVES
GUICHON VALVES manufactures various types of non return check valves, to meet the required operating conditions, leak rate and installation position (vertical or horizontal) :
- swing check (types 902 and 903)
- piston and spring loaded, axial or Y types (types 901, 903, 905)
- ball type (type 904).
Sealing surfaces can be metal-to-metal (stellited option) or soft seated (PTFE seal). All connection requirements can be met : lug or wafer type, flanged, BW, SW or tapered.
A number of optional arrangements are proposed :
- profiled axial disc with special, low friction design to allow closing under very low differential pressure and offer minimum pressure loss coefficient
- screwed or solid seats
- heating jacket
- PTFE or metal ball (stellite)
Materials
These valves can be made in welded or solid construction, in a large choice of steels and alloys.
Range
Size ½’’ to 24’’ 150 to 2,500 Lbs
DN 15 to 600 PN 10 to 420 |
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Swing check valve
Type : 902, 922, 952 |
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Ball type axial check valve
Type : 904, 924, 954
- DN 15 to 200 (1/2in. to 8 in.), PN 10 to 100 (class 150 to 600)
- Stainless and duplex steels, nickel alloys, special alloys (titanium, zirconium)
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Spring type axial check valve
Type : 903, 923, 953
- DN 350 - Class 150
- Cracking pressure : 0,2 bar
- Profiled disc, very low pressure drop
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