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EMERSON Product|English

Fisher Type 289P pilot-operated

Fisher Type 289P pilot-operated

Fisher Type 289P pilot-operated relief valve is used to provide over pressure protection for downstream systems suitable for service on natural gas, air, propane, or any other operating medium not corrosive to the internal parts. Smooth opening action minimizes system pressure surges during emergency action. Very little buildup over set pressure is required to completely open the main valve for max relief capacity. The external control line provides quick, accurate pressure registration.

Specifications

Body Sizes and End Connection Styles

1 or 2 NPT

Maximum Relief (Inlet) Pressure

1 NPT: 50 psig / 3.4 bar over relief set pressure or 110 psig / 7.6 bar whichever is lower
2 NPT: 15 psig / 1.0 bar

Relief Set Pressure Range

1 NPT: 10 to 100 psig / 0.69 to 7.0 bar in three ranges
2 NPT: 14-inches w.c. to 10 psig / 35 mbar to 0.69 bar in two ranges

Pressure Registration

External

Temperature Capabilities

With Nitrile (NBR): -20 to 180°F / -29 to 82

With Fluorocarbon (FKM): 0 to 300°F / -18 to 149

Features

Economical

High Relief Capacity with Low Buildup

Accurate

Fast Reseat After Operation

Ease of Maintenance

Rugged Construction

Corrosion Resistant Fasteners

Full Usable Capacity

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