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Model 525 1" Slow Opening Blow Off Valve

Model 525 1" Slow Opening Blow Off Valve

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Class 300
ANSI B 16.34
600 psi Working Steam Pressure @ 500 º F
740 psi @ 100 º F
100% Pressure Tested
Maximum Boiler Blow-Off Pressure 480 psi per Sec 1 Table A-361
Threaded Ends
High Temp. Powder Coating for Corrosion Resistance
CRN OCO7135.2, 24, 25, 26
CRN OEO2171.7, 79, 70, 78, 7AY, 7T, 7N

The United Brass slow opening boiler blow off valve has been designed for the rugged service of boiler treatment and scale. The cast steel knife gate valve conforms to Class 300 of ANSI B16.34 and features a stainless steel seat and disc hardened to Rockwell 60. ASME Boiler and Pressure Vessel Code Section 1 PG-42.1.12 and Power Piping Code ASME B 31.1 Table 126.1 reference steel valves to ANSI B16.34. The sliding disc provided a "cleaning" action that keeps the seating area clear of scale and debris.




5.50 in

B - Total Length

12.30 in

C - Length

9.50 in

Quantity per Carton


Valve Type


Pressure Class

300 WSP

End Connection




Canadian Registration