Fisher 1805 Series relief valves are designed for use in farm tap applications where a relief valve is needed between the first-stage and second-stage regulators.

Fisher Type 1805P-6358 relief valve is an accurate, low-cost, pilot-operated relief valve consisting of a Type 1805P main valve and a Type 6358 pilot.

Fisher Type 1808 and 1808A are economical, compact devices used in gas or liquid service to maintain pressure on oil and gas separators, and in pressure relief applications in gas distribution systems.

Fisher 289 Series relief valves are spring-loaded throttling relief valves used as downstream pressure regulators to protect the system from overpressure.

Fisher Type 289P pilot-operated relief valve provides protection from overpressuring a downstream system. This relief valve is suitable for service on natural gas, air, propane, or any other operating medium not corrosive to the internal parts.

Fisher Type 63EG pilot-operated pressure relief valves may be used for both liquid and gas service. Type 63EG is also suitable for throttling backpressure or bypass applications.

Fisher Type EZR pilot-operated, pressure relief valve or backpressure regulator is typically used in city gate and district stations as a relief valve for overpressure protection, or in commercial and industrial applications as a backpressure regulator.

Fisher Type H120 self-operated relief valve has a preset and pinned spring retainer. Type H120 may be used where venting to the atmosphere is acceptable and where some pressure-relieving tolerance is acceptable.

Fisher H200 Series Pop relief valves are direct-operated relief valves with preset and pinned spring retainers.