WATTS®, 0371271, Pressure Relief Valve, Calibrated, Series: 530C, 1/2 in Nominal, MNPT x FNPT End Style, 50 to 175 psi Pressure, 180 deg F, Media: Air/Oil/Water, Brass Body, Buna-N® O-Ring Softgoods, 1-5/8 in W x 3 in H Dimensions, Domestic
| Type | : | Calibrated |
| Series | : | 530C |
| Nominal Size | : | 1/2 in |
| End Style | : | MNPT x FNPT |
| Pressure Rating | : | 50 to 175 psi |
| Temperature Rating | : | 180 deg F |
| Media | : | Air/Oil/Water |
| Body Material | : | Brass |
| Softgoods Material | : | Buna-N® O-Ring |
| Dimensions | : | 1-5/8 in W x 3 in H |
| Domestic/Import | : | Domestic |
- All stainless steel spring
- Outlet (side), female NPT threaded
- Inlet (bottom), male NPT threaded
- Designed for protection against excessive pressure build up
- Bronze body construction
- Buna-N disc on machined body seat
Specification Sheet
Series 530C Calibrated Pressure Relief Valves are used in commercial, residential and industrial applications to protect against excessive pressure in systems containing water, oil, or air. It consists of a bronze body construction with NPT threaded male inlet and NPT threaded female (drain) outlet connections, stainless steel spring, brass bonnet, Buna-N disc, and Buna-N O-ring. Series 530C has a calibrated adjustment feature for setting the valve to the required relief pressure, and is ideal for by-pass thermal expansion pressure relief (not ASME approved). Model 530FP is for use in fire protection systems. Maximum Pressure: 300psi (20.67 bar). Adjustable Pressure Ranges: Sizes 1/2, 3/4 in. (15 to 20mm) - 50 to 175psi (3.45 to 12.06 bar), Size 3/4 in. (20mm) - 100 to 300psi (6.89 to 20.67 bar).