*The Marshall Excelsior-1289 relief valve is an exact clone of a 289 and P289/L289

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For Low Pressure Relief, See the Fisher 289L Relief Valve

Available in settings ranging between 1 to 75 PSIG, the MEGR-1289H Series relief valve is a throttling relief valve used downstream of pressure regulators to protect the downstream system from overpressure. A smooth throttling action minimizes pressure surges in the system during emergency operation.

This unit features a pitot tube booster to achieve the highest possible relief capacity with a minimum buildup of system pressure.

The MEGR-1289H relief valve is installed between large second stage regulators and the burner to provide high capacity relief. They are ideal for low pressure settings due to the increased sensitivity provided by the large diaphragm area.

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Type: Adjustable / Inches WC or PSI
Max. Inlet Pressure: 100 PSIG (1” Body) 25 PSIG (2” Body)
Spring: Plated Steel
Inlet/Vent: 1”NPT / 1” NPT, 1”NPT / 2” NPT,    2”NPT / 2” NPT
Exterior Finish: Gray Powder Coat
Diaphragm: Fabric Reinforced Nitrile (NBR)
Bonnet Cap & Bonnet / Body Material: 1” - All Aluminum, 2” - Aluminum Bonnet / Iron Body

Features:

Throttling Type Relief
High Flow Rates
Compact
Reliability Due to Simplicity
Tight Shutoff

Applications:

Fuel Gas Relief
Gas Gathering Relief
Downstream System Pressure Control
Low-pressure relief

Parts / Accessories:

Marshall Excelsior Spring for 1289H Relief Valve

Resources:

Flow Rates:

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