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 1641 & 1643 Standard Features
- Size 1-1/2 and 2 bodies & bonnets are forged steel (A105)
- Size 2-1/2 bodies and bonnets are cast steel (WCB)
- Bolted bonnet, OS & Y
- Straightway and angle design
- Size 1-1/2 and 2 have hardened stainless steel disk
- Size 2-1/2 has Stellite faced disk
- Integral Stellite seat
- Integral backseat
- 13% chromium stainless steel stem
- Asbestos-free spiral
Pressure Class 400 (PN 68) & 600 (PN 110)
- FIG. NO. TYPE ENDS NPS (DN)1641 Globe Flanged 1-1/2 (40) thru 2-1/2 (65)
- 1641Y Globe Socketweld 1-1/2 (40) & 2 (50)
- 1641Y Globe Buttweld 2-1/2 (65)
- 1643 Angle Flanged 1-1/2 (40) thru 2-1/2 (65)
- 1643Y Angle Socketweld 1-1/2 (40) & 2 (50)
- 1643Y Angle Buttweld 2-1/2 (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.
