Watts Regulators series 174A boiler pressure relief valves are used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet drain connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 174A resists corrosive water conditions, sticking and freezing and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief and shall not be used as an operating control.
WATTS® Water Pressure Relief Valve, Series: 174A, 3/4 in Nominal, FNPT, 125 psi, Lever Actuator, Bronze Body, Stainless Steel Handle, 250 deg F, 2-3/4 in L x 4-1/2 in H
| Body Material | : | Bronze |
| Connection Type | : | FNPT |
| Dimensions | : | 2-3/4 in L x 4-1/2 in H |
| Nominal Size | : | 3/4 in |
| Pressure Rating | : | 125 psi |
| Series | : | 174A |
- Safety relief valves for pressure protection only of all types of hot water heating boiler equipment
- Seat located above drain, water can't be trapped and sediment can't foul seat
- Non-mechanical seat-to-disc alignment will not stick or freeze
- Each hot water space heating boiler shall be equipped with a pressure relief valve set to relieve below the maximum boiler working pressure
- Water seal of high temperature resisting material isolates spring working parts from water during relief
Specification Sheet