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Models 91, 218, 228
Cast Iron Liquid Relief Valves
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 handwheel to 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.
Applications
- Fire Pump Service, UL and FM approved. (Models 218, 228)
- Overpressure relief and protection of pumps, tanks, lines and
hydraulic systems.
- Pressure regulating.
Options
- SS trim. (insert and disc) (Variation 02)
- Female x Female NPT connections. (1 1/2-inch through 4-inch
sizes)
- Inlet and outlet flanges per ANSI B16.34, 1-inch - 125#. Limited
to 175 psig maximum set pressure.
Features and Benefits
- 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.
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