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.
