The connection between the bonnet and the body may be threaded, flanged, welded, or pressure sealed or the bonnet and the body may be integrated without connection. Stronger, leakproof bolted body bonnet joint ensures joint tightness with a higher bolting torque. The cast body and bonnet flange are joined by studs and nuts with a gasket of suitable material inserted between the flange faces to facilitate sealing. PERFECT produces a wide variety of cast steel bolted bonnet Gate, Globe and Check valves.

PERFECT is a fully stocked manufacturer and supplier of industrial valve and we provide a broad range of standard commodity cast gate valve, globe valve, swing check valve for sale that is supplied to various industries. Available in size ranges from 2 inches to 24 inches and ASME B16.34 pressure classes from #600 to #1500, We can also accept the OEM design, so whether you need special valves or have a large order to place, we can provide you with the customized service for you. Please review the charts below for available sizes & pressure & material or fill the contact form below.

  • Simple operation, more convenient to open and closure;
  • Stronger, leakproof bolted body bonnet joint ensures joint tightness with a higher bolting torque;
  • Spiral wounded stainless steel and graphite gasket material for cast bolted bonnet globe valve and check valve;
  • Co-Cr alloy hardfaced seat facing and lapped to a mirror finish. Conical seat machined to fine surface finish.

Cast Steel Bolted Bonnet Valve Design

Available valve type
  • Bolted Bonnet gate valves
  • Bolted Bonnet globe valves
  • Bolted Bonnet check valves
Design Standard
  • API 600
  • API 623
  • API 594
F to F Standard ASME B16.10
Testing Standard API 598
End Connection Standard ASME B16.5
  • DN50 ~ DN900
Pressure Class Range
  • ANSI 150lb ~ 1500lb
Ends Flanged
  • Body Material: ASTM A216WCB, ASTM A351-CF8, CF8M, CF3, CF3M, etc
  • Seat & Seal Materials: Virgin PTFE, Reinforced PTFE, PFA Lined, Soft and Hard Rubber Lined, NBR, EPDM, PEEK,e tc

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