Model Descriptions
- Model 91: Bronze trim, with pressure-tight cap. Suitable for maximum back pressure of 60 psig.
- Model 218: Bronze trim, UL and FM approved for fire pump installations. Special design offers minimum set pressure of 60 psig. Easily adjustable with handwheelto 200 psig (175 psig with optional 125# inlet flange).
- Model 228: Bronze trim, with pressure-tight cap. UL and FM approved for fire pump installations. Suitable for maximum back pressure of 60 psig.
Pressure and Temperature Limits
- Model 91: 5 to 400 psig -20° to 406°F
- Models 218, 228: 60 to 200 psig -20° to 406°F
Furnished standard with ANSI rated B16.1 – 250# inlet flange and ANSI B16.1 – 125# outlet flange.
- Bolted bonnet permits easy inspection and servicing without removal from system.
- Quality cast iron body and bonnet, insert and disc are available in either bronze or Stainless Steel and lapped for optimum performance.
- Springs are steel with plating for corrosion protection.
- High lift, wing-guided disc offers high relieving capacity. Pivot between disc and spring corrects misalignment and compensates for spring side thrust.
- Fire Pump Service, UL and FM approved. (Models 218, 228)
- Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
- Pressure regulating.
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