Manual Operation Forged Steel Screw Down Non Return Valve Conform to API 602, ASME B16.34, They are tested according to API 598, and marked as per MSS SP-25.
1. Construction is as follows:
2. Main Part & Materials
3. Normal Pressure Rating
PN10~PN420, CLASS150~2500
4. Normal Size Range
DN15~DN50, 1/2"~2"
1. Construction is as follows:
- Full Port or Standard Port | |||||||
| - Outside Screw and Yoke(OS&Y) | |||||||
| - Bolted Bonnet with spiral-would gasket, threaded and seal welded bonnet and threaded and pressure seal bonnet | |||||||
| - Backseat | |||||||
| - Solid or Flexible Wedge | |||||||
| - Butt Weld Ends to ASME B16.25 | |||||||
| - RF Ends to ASME B16.5 or B 14.7 |
2. Main Part & Materials
Part Names | Part Materials | |||||||
| Body | A105 | LF2 | F11 | F304 | F316 | F304L | F316L | C83600/C95800 |
| Bonnet | A105 | LF2 | F11 | F304 | F316 | F304L | F316L | C83600/C95800 |
| Disc/Ball/Wedge | A105 | LF2 | F22 | F304 | SS316 | F304L | F316L | C83600/C95800 |
| Stem | F6a | F304 | F6a | F304 | F316 | F304L | F316L | C83600/C95800 |
| Seat/Seat Ring | EPDM | EPDM | EPDM | EPDM | EPDM | EPDM | EPDM | EPDM |
| 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 |
3. Normal Pressure Rating
PN10~PN420, CLASS150~2500
4. Normal Size Range
DN15~DN50, 1/2"~2"