Kunkle Cast Iron Liquid Relief Valve Models 91, 218, 228

Made with cast iron and bronze trim, this tough valve is used with fire pump service (UL and FM approved – models 218 and 228), overpressure relief and protection of pumps, tanks, lines and hydraulic systems. Also good with pressure regulation, optional stainless steel trim available.

Model Descriptions:

Cast Iron Liquid Relief Valves

Model 91: Bronze or stainless steel trim with pressure-tight cap. Suitable for maximum back pressure of 60 PSIG. Variation “03” for field adjustability.
Model 218: Bronze or stainless steel 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 or stainless steel trim with pressure-tight cap. UL and FM approved for fire pump installations. Suitable for maximum back pressure of 60 PSIG. Supplied with handwheel.

Features:

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 (SS) 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.
Each Kunkle valve is tested and inspected for pressure setting and leakage.

Applications:

Fire pump service, UL 1478 listed and FM approved (Models 218, 228).
Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
Pressure regulation.

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

Options:

Variation 02: SS trim (insert and disc).
Female x female NPT connections (1 1/2“ to 4” sizes).
Inlet and outlet flanges per ANSI B16.1-125#. Limited to 175 PSIG maximum set pressure.
Epoxy-coated internal body and bonnet. Temperature limit 125°F [52°C].

Please refer to the Kunkle Catalog or Contact Us for additional information.