EDWARD 1441 GLOBE & 1443 ANGLE BLOW OFF VALVE
Edward 1441 Globe & 1443 Angle Blow Off Valve Standards Edward valves sold for blow-off service are designed and manufactured to comply with all Boiler Code criteria for valves used in these applications.
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 wound bonnet gasket
• Impactor handle
Pressure Class 300 (PN 50)
FIG. NO. TYPE ENDS NPS (DN)
1441 Globe Flanged 1-1/2 (40) thru 2-1/2 (65)
1441Y Globe Socketweld 1-1/2 (40) & 2 (50)
1441Y Globe Buttweld 2-1/2 (65)
1443 Angle Flanged 1-1/2 (40) thru 2-1/2 (65)
1443Y Angle Socketweld 1-1/2 (40) & 2 (50)
1443Y Angle Buttweld 2-1/2 (65)
Pressure Ratings (B16.34 Standard Class)
Flanged or Welding Ends Class 300 Primary Service
Maximum Boiler Drum Pressure* 490 PSI (33.8 BAR)
Maximum Non-Shock 740 PSI @ 100°F (51.1 BAR)
*This adjusted pressure rating represents the maximum allowable working pressure for this
