Double Expanding Gate Valve
The Slab gate valves is a sliding valve with closing parts as parallel gates. The shutter can be single gate or double gate with extension mechanism. The pressing force of the gate to the valve seat is controlled by the medium pressure of the floating gate or floating seat. If it is a double gate flat gate valve, the expansion mechanism between the two gates can supplement this compaction force.The flat gate valves can be divided into manual flat gate valves, pneumatic flat gate valves and electric flat gate valves according to the driving mode. It can be divided into flat gate valve with diversion hole, flat gate valve without diversion hole, flat gate valve of oil field, flat gate valve of pipeline and gas plate valve.
Bare Shaft Flange Type Cast Steel Through Conduit Gate Valve Conform to API 6D, API 6A . They are tested according to API 598, and marked as per MSS SP-25
Construction is as follows:
- Full Port |
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| - Outside Screw and Yoke(OS&Y) | ||||
| - Bolted Bonnet with spiral-would gasket, and pressure seal bonnet | ||||
| - Expanding or Double Expanding | ||||
| - Solid Wedge | ||||
| - Butt Weld Ends to ASME B16.25 | ||||
| - Flanged Ends to ASME B16.5 and B16.47 |
Main Part & Materials
Part Names |
Part Materials | |||||||
| Body | WCB | LCB | WC6 | CF8 | CF8M | CF3 | CF3M | C83600/C95800 |
| Bonnet | WCB | LCB | WC6 | CF8 | CF8M | CF3 | CF3M | C83600/C95800 |
| Disc/Ball/Wedge | WCB | LCB | WC6 | CF8 | CF8M | CF3 | CF3M | C83600/C95800 |
| Stem | F6a | F304 | F6a | F304 | F316 | F304L | F316L | C83600/C95800 |
| Seat/Seat Ring | 13%Cr | SS304 | 13%Cr | SS304 | SS316 | SS304L | SS316L | C83600/C95800 |
| PTFE/VITON | ||||||||
| Packing | Graphite/PTFE | |||||||
| Gasket | SS304+Graphite/SS304+Graphite | |||||||
| Bolts/Nuts | B7/2H | L7/4 | B16/4 | B8/8 | B8M/8M | B8/8 | B8M/8M | B8M/8M |
| Suitable Medium | W.O.G etc. | HNO3, CH3OOH etc. | Sea Water etc. | |||||
| Suitable Temperature | -29~425 °C | -46~340 °C | -46~340 °C | -196~427 °C | -196~427 °C | -196~427 °C | -196~427 °C | -29~220 °C |
Normal Pressure Rating
PN10~PN420, CLASS150~2500
Normal Size Range
DN50~DN1000, 2"~40"
