The Fisher Fisher Models 627R and 627MR are equipped with a stroke stop—an internal pressure relief valve that works even if the disc or linkage fails. As the diaphragm rises, the pushrod touches the stroke stopper on the lever retainer, and as the diaphragm rises, the pressure relief valve is opened.
Equipped with a pressure relief operation indicator – when the pressure relief valve is opened, the rubber cap that covers the vent assembly is flushed open, indicating that the pressure relief valve has been opened since the last inspection.
Ease of maintenance—Trim parts can be replaced without removing the regulator body from the line. Two bolts between the valve body and the diaphragm housing simplify disassembly during maintenance.
Good installation adaptability – the ability to rotate the diaphragm housing and regulator body to any of the four positions allows the regulator to be installed in a limited space. As long as the spring box vent is protected from external interference, the regulator can be installed in any position without affecting its normal operation.
Applications – The 627 series can be used as a pressure regulator, regulator-relief valve, monitoring regulator or high-pressure industrial regulator in various branch pipes of the farm.
Tamper Resistant – Adjustment screws, locknuts, and protective caps are standard on all 627 Series regulators to prevent tampering with the pressure setpoint.
Wide range of flow capacities – a range of body sizes and seat diameters are available to meet different flow requirements.
Tight shut-off – Flat nitrile rubber or nylon discs provide excellent shut-off performance.
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