Forged Steel Extended Gate Valve can be also called Vent Valve or Drain Valve. There are several type for this valve such as DV111, DV113, DV115, ETC. It can be made with One Flange End and one Plug End, one SW End and one plug End, etc.
1.Standard specification.
Ø ?Design and manufacture:API 602,BS 5352,ANSI B16.34.
Ø ?Connection ends conform to:
-Socket welded ends:ANSI B16.11.
-(NPT threaded)Screw ends:ANSI B1.20.1.
-Butt-welded ends:ANSI B 16.25.
-Flanged ends:ANSI B 16.5.
Ø ?Inspection & testing:API 598.
Ø ?NACE MR 0175 on request
Ø ?Tag: MSS SP 25.
2.Construction features.
Ø ?Non-Rising Handwheel,
Ø ?Outside Screw And Yoke,Rising Stem.
Ø ?Integral Backseat.
Ø ?Solid Wedge,Renewable Seat Rings,Sprial Wound Gasket.
Ø ?Spring Loaded To Ensure That Even In The Low-Pressure Sealing Performance As Well.
Ø ?Low Leakage Test Stem Packing By.
Ø ?Automatically Adjust The Preload Gland Packing.
3.Product Range.
Ø ?Port:Full Port(FP)/Reduced Port(RP).
Ø ?Structure:BB(Bolted Bonnet),WB(Welded Bonnet),PSB(Pressure Self-sealing Bonnet).
Ø ?Rating: Class 150/ 300/ 600/ 800/ 900/ 1500/ 2500/ 4500.
Ø ?Size Range:3/8" to 2"
Ø ?End Options: FLG, SW(Socket Welded), Threaded(NPT/BSP), BW(Butt Welded),
Ø ?Optional Materials:
-Carbon Steel: A105, LF2
-Stainless Steel: F304, F304L, F316, F316L
-Duplex: F51, F55
-Alloy: F1, F5, F5A, F9, F11, F22
Ø ?Special Design:
-Bellow Seal forged gate valve.
-Cryogenic forged gate valve.
-Extended body forged gate valve.
-Venting forged gate valve.
-Twins forged gate valve.
4.Application.
For valves which size is smaller than 2"(DN50), forged steel valves are recommended. Compared with castings,forged valve offer the advantages of more uniform structure, greater density, higher strength integrity, enhanced dimensional characteristics and closer dimensional tolerances.Owing to so many advantages,the forged valve can be widely used in the fields of petroleum,natural gas,chemical,power and other industries.
Extended body gate valve(Vent Valve or Drain Valve ) specific connection code
| Connection Code | K | K1 | K2 | K3 |
| Screwed Weld | Inclined End | A Full Strength End | Socket Weld End |
Extended body gate valve (Vent Valve or Drain Valve ) standard material specifications
| NO. | Part Name | CS to ASTM | AS to ASTM | SS to ASTM |
| Type A105 | Type F22 | Type F304(L) | Type F316(L) |
| 1 | Body | A105 | A182 F22 | A182 F304(L) | A182 F316(L) |
| 2 | Seat Ring | A276 420 | A276 304 | A276 304(L) | A276 316(L) |
| 3 | Wedge | A276 410 & 403 | A182 F304 | A182 F304(L) | A182 F316(L) |
| 4 | Gasket | Corrugated SS + graphite | SS + PTFE |
| 5 | Stem | A182 F6 | A182 F304 | A182 F304(L) | A182 F316(L) |
| 6 | Bonnet Bolt | A193 B7 | A193 B16 | A193 B8 | A193 B8M |
| 7 | Pin | A276 420 | A276 304 |
| 8 | Gland Eyebolt | A193 B7 | A193 B16 | A193 B8 | A193 B8M |
| 9 | Gland Nut | A194 2H | A194 4 | A194 8 | A194 8M |
| 10 | Nameplate | SS |
| 11 | Hand wheel | A197 |
| 12 | H.W. Lock Nut | A194 2H | A194 4 | A194 8 | A194 8M |
| 13 | Yoke Nut | A276 420 |
| 14 | Gland Flange | A105 | A182 F11 | A182 F304(L) | A182 F316(L) |
| 15 | Gland | A276 410 | A182 F304(L) | A182 F316(L) |
| 16 | Stem Packing | Flexible Graphite | PTFE |
| 17 | Bonnet | A105 | A182 F22 | A182 F304(L) | A182 F316(L) |
| Suitable Medium | W.O.G. etc | W.O.G. etc | HNO3CH3OOH etc |
| Suitable Temperature | -29ºC~425ºC | -29ºC~550ºC | -29ºC~180ºC |
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