WATTS® 0274751 174A-125 Pressure Relief Valve, 3/4 in Nominal, FNPT End Style, 30 to 150 psi Pressure, Bronze Body, Domestic
WA174AI125
MFG #: 174A-3/4-125
- Body Material: Bronze
- Country of Origin: US
- Dimensions: 2-3/4 in L x 4-1/2 in H
- Domestic/Import: Domestic
- End Style: FNPT
- Manufacturer Name: Watts Water Technologies
- Media: Water
- Nominal Size: 3/4 in
- Series: 174A, 174A-125
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.
- Features and More
Features
- Automatic reseating
- 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
- Water seal of high temperature resisting material isolates spring working parts from water during relief
- In 5 psi (34.5 kPa) increments from 30 to 150 psi (2 to 10 bar) with corresponding high ratings from 650000 to 14370000 Btu/hr pressure
Application
- Pressure Protection of Hot Water Heating Boilers
Standards/Approvals/Certifications
- Military Spec MIL-V-18634B
- Type I
- Class 3A
- Style A (Bronze Body)
- Style B (Iron Body) and National Board of Boiler and Pressure Vessel Inspectors to the requirements of ASME
- PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.
Warranty
- 1 year Limited