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:
- 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"
Since 1989, Vatac Vango Valves Manufacturer China has dedicated itself to the manufacture and service of a wide range of industrial valves and fittings for the services of Oil, Gas, Refinery, Chemical, Marine, Power Station and Pipeline Industries.
After over 3 decades of development and innovation, Vango Valves has been well approved by ISO 9001: 2000, API 6D & CE.
Our main Manufacturing and Supplying Capability Covering:
Through Conduit Gate Valve, Knife Gate Valve, Bellow Sealed Valve, Gate Valve, Check Valve, Globe Valve, Ball Valve, Butterfly Valve, Plug Valve, Cryogenic Valve, Diaphragm Valve, Needle Valve, Pinch Valve, Strainer, Steam Trap, Flanges and Pipe Fittings.
Materials ranges from conventional cast or forged steel to special alloy materials like Monel, Inconel, Hastelloy or Duplex steel. All of our products are designed, manufactured and tested fully to API, ASTM, ANSI, JIS, DIN and BS Standards.
Adhering to the tenet "Quality the world value", Vatac Vango Valve is stepping towards to the first class manufacturer and supplier of Industrial Valves and fittings in the world.
