Forged  steel gate  valve

Forged steel gate valves have three type of bonnet designs.The first type is bolted bonnet,the valve body is connected with bonnet by bolts and nuts and sealed by spiral gasket with advantages of convenient for maintenance.The second one is welded bonnet ,the valve body is fully welded with sealing bonnet.The third one is pressure self tightening bonnet,the valve body is screwed into the bonnet and sealed by inner pressure,this design have better sealing ability for high pressure valves.

Product Range: 

●Size: NPS1/2’’ –2’’/DN15– DN50

●Rating: Class 150 – Class 2500/PN16– PN420

●Material:A105, LF2,A182F304(L), F316(L),F51, F11,F347,Monel

●Operation: handwheel,actuator

Design descriptions:

● Full bore or reduced bore

●Outside screw and yoke(OS&Y)

●Bolted bonnet ,welded bonnet and pressure seal

● Integral backseat

●BW(Buttwelding),SW(socket welding ends),NPT or Screwed ends

●Rising stem and non-rising handwheel

Applicable standards:

●Design& manufacture: API 602,ASME B16.34,BS5352

●Face to face:Manufacturer standard

●Butt-weld ends: ASME B16.25,EN 12627

●Socket welding:ASME B16.11

●Screwed ends:ASME B1.20.1

●Inspection and test:API 598,EN 12266