Gear box butterfly valve
The gear box butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. The valve can be opened and closed quickly with only 90 degrees of rotation, and the valve has good fluid control characteristics.
• Spline driven one piece shaft connected to spherically machined disc allows high torque transmission i.e. quick response and minimum back-lash
• Long term reliability due to upper and lower anti-friction bearings
• Safe maintenance: shaft blow out protection with circlip
• Position indicator
Body materials ：carbon steel, stainless steel, Alloy Steel, Duplex Steel.
special material (duplex, inconel)
Body Material: WCB, CF8, CF8M, CF3, CF3M, CAST IRON ,A105 ,904L ,etc.
Valve seat materials ：inconel, others on request
Seal materials graphite / stainless steel, inconel, stainless steel, PTFE
Size range(s)：NPS 2 - 48 (DN50 - 1200)
Pressure rating：ASME Classes 150 - 600
Disc Sealing: PTFE, Graphite Laminated
Standards:ASTM, ANSI,AWWA, JIS,BS, GOST, DIN etc.
Design Standard: API 609, MSS SP-67, MSS SP-68, BS 5155
Face to Face: API 609, ASME B16.10, BS 5155, EN1092
End Connection: ASME B16.5, ASME B16.47
Inspection and Test: API 598/API6D/EN12266-1