Models 91, 218 and 228

Description
Specifications
Documentation

Cast Iron Liquid Relief Valves

Model Descriptions
Model 91: Bronze trim, with pressure-tight cap. Suitable for maximum back pressure of 60 psig*. Variation "03" for field adjustability.
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*. Supplied with handwheel.

* Back pressure increases set pressure on a one to one basis, and reduces capacity. Back pressure in excess of 10% of set pressure is not recommended.

Features & 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 (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.

Specifications

Pressure and Temperature Limits**
Model 91: 5 psig to 400 psig; -20°F to 406°F
Models 218, 228: 60 psig to 200 psig; -20°F to 406°F
Furnished standard with ANSI rated B16.1 - 250# inlet flange and ANSI rated B16.1 - 125# outlet flange.

** For other pressure and temperature limits, consult ANSI B16 cast iron flange standards.

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產(chǎn)品名稱：Models 91, 218 and 228

Models 91, 218 and 228

Features & Benefits: