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Edward 1643 Blow Off Valve Angle

Edward valves sold for blow-off service are designed and manufactured to comply with all Boiler Code criteria for valves used in these applications.

Edward 1643 Blow Off Valve Angle Standard Features
  • Size 11/2 and 2 bodies & bonnets are forged steel (A105).
  • Size 21/2 bodies and bonnets are cast steel (WCB).
  • Bolted bonnet, OS & Y.
  • Straightway and angle design.
  • Size 11/2 and 2 have hardened stainless steel disk.
  • Size 21/2 has Stellite faced disk.
  • Integral Stellite seat.
  • Integral backseat.
  • 13% chromium stainless steel stem.
  • Asbestos-free spiral
Edward 1643 Blow Off Valve Angle
  • Pressure Class 400 (PN 68) & 600 (PN 110)
  • FIG. NO. TYPE ENDS NPS (DN)
  • 1641 Globe Flanged 11/2 (40) thru 21/2 (65)
  • 1641Y Globe Socket Welding 11/2 (40) & 2 (50)
  • 1641Y Globe Buttwelding 21/2 (65)
  • 1643 Angle Flanged 11/2 (40) thru 21/2 (65)
  • 1643Y Angle Socket Welding 11/2 (40) & 2 (50)
  • 1643Y Angle Buttwelding 21/2 (65)
  • Pressure Ratings (B16.34 Standard Class)
  • Flanged or Welding Ends Class 600 Primary Service
  • Maximum Boiler Drum Pressure* 935 PSI (64.5 BAR)
  • Maximum Non-Shock 1480 PSI @ 100°F (102.1 BAR)

*This adjusted pressure rating represents the maximum allowable working pressure for this Class valve in
boiler feed and blow-off line service.

Specs & Brochures