- Ficha técnica - 174A, 374, 740
- Installation Instructions - Tag for 174A, 335, 374A, 474A, 740, LF174A, LF474A, M375
- Specification Sheet - 174A, 374, 740
This 1 1/4 inch boiler pressure relief valve is used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of an iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It offers large discharge capacity, resists corrosive water conditions, resists sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief, not as an operating control. The pressure relief is set at 30 psi ( 206.8 kPa) with corresponding high pressure ratings up to 2,105,000 BTU/hr.
Features
- Spring loaded
- Set at 30 psi
- Automatic reseating
- Iron body construction
| Specifications | |
|---|---|
| Body Material | Iron |
| Brand | Watts |
| Buy American Act Compliant | NO |
| EAN | 098268019209 |
| GPM-When Relieved | Does Not Apply to Product |
| Inlet Connection Size | 1 1/4 IN |
| Inlet Connection Type | Female Threaded |
| Inlet Thread Type | NPT |
| Lead Free | Not In Scope |
| Maximum Temperature-Fahrenheit | 250 |
| Maximum Working Pressure-PSI | 20 |
| Outlet Connection Size | 1 1/2 IN |
| Outlet Connection Type | Female Threaded |
| Outlet Thread Type | NPT |
| Part Number | 0383020 |
| Pressure Range | 30 to 75 PSI |
| Pressure Relief Setting-PSI | 30 |
| Pressure Steam Discharge Capacity | 2,105,000 BTU per hour |
| Protection Type | Pressure |
| Series | 740 |
| Shank Length | Does Not Apply to Product |
| Temperature Steam Discharge Capacity | Does Not Apply to Product |
| Thermostat Material | Does Not Apply To Product |
| Thermostat Probe Length | Does Not Apply to Product |