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Class 1690
Spring Loaded Piston Check Valves
Horizontal or Vertical Service
Forged Steel ASTM A1&2 Grade F22 Cl.3 (2-1/4% Chrome, 1% Moly)
Seal Welded Cover
More Details
FWB580E - NPT Ends
FWB581E - Socket Weld Ends
Sizes: 1/2" thru 2"
ASTM A105N Low Carbon (.25 max), Normalized
Standard Port
OS&Y - Welded Bonnet
Working Pressure (Non-Shock)
860psig @ 900°F. Steam Off
1340 psig @ 850°F Steam-Off
3705psig @ -20°F to 100°F
Conforms to applicable API & ASME/ANSI specifications (see Tech.Data Sheet in Download File)
Valve can be furnished to meet NACE Spec. MR0175
Description coming soon