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Type 1805 relief valve is designed for installation between the first and second-stage regulators or in the downstream line from a high-pressure regulator used for a final-stage service where high line pressures are allowed. Available in 1 or 2 in. valve bodies.
Type 1808A pilot-operated relief valve is designed to protect large high-pressure regulators by offering extremely high relief capacities.
Type 289H relief valve is designed for installation downstream of larger high-pressure or low-pressure regulators in most all relief applications. The larger diaphragm in this relief valve provides extremely sensitive operation.