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The self-operating HAT/RA-HP (Heat Actuated Trap/Reverse Acting – High Pressure) Thermostatic Thermal Relief Valve is installed onto the pump to monitor the fluid temperature. If the fluid temperature increases to within the operating range of the HAT/RA-HP, the thermal actuator will modulate the valve open to discharge the over-temperature fluid. As the outlet temperature falls, the valve then modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature and reduces wasted water and energy.
The HAT/RA-HP Thermostatic Thermal Relief Valve is commonly used as a thermal relief valve on fire pumps and high-pressure water pumps to keep them cool during idling. It may be used as a regulating valve to maintain the flow of glycol, water, or other media in critical cooling applications and to economically remove heat from equipment or a process.
- Exclusive self-actuating Thermoloid® wax blend thermal actuator
- Rated for higher pressure systems – up to 1000 PSIG
- All stainless-steel body, fittings, spring and plug
- Compact low mass – fast response
- Corrosion resistant – long service life
- Ram-type plug for reliable shut-off
- Operates in narrow temperature band
- Self-operating – no external power source required
- Protects pump and pump seals from over-temperature damage
- Maintains constant discharge temperature
- Improves system efficiency
- Unaffected by pressure variations
- Discharges minimum amount of water to keep water temperature at safe limits
- Quick and easy installation
| Series | HAT/RA-HP |
| Description | 1/2" HAT/RA-HP-M/F |
| Size | 1/2" NPT |
| Diameter-in | 1.1 |
| Diameter-mm | 28 |
| Length-in | 3.8 |
| Length-mm | 97 |
| Weight lb | 1 |
| Weight kg | 0.5 |
| Cv | 0.7 |
| Maximum Operating Pressure | 1000 PSIG (69 BAR) |
| Maximum Temperature | Range 150ºF (83.3ºC) over set-point with a limit of 250°F (121°C) |
| Opening Temperature | 90°F, 95°F, 100°F, 105°F, 110°F, 125°F, 130°F, 140°F (32.2°C, 35°C, 37.8°C, 40.6°C, 43.3°C, 51.7°C, 54.4°C, 60°C) |
| Closing Temperature | Valve will close 10°F below the open temperature |
| Body Material | Stainless Steel |
| Seal Material | EPDM or Viton Seals |
| Isometric View | Download |
| Front View | Download |
| Top View | Download |
| Side View | Download |
Disclaimer
All drawings and 3D models are provided for reference only and are not controlled documents. Files may not reflect current revisions or design intent and shall not be used for manufacturing, inspection, or certification. Only officially released ThermOmegaTech drawings and documents issued through the company’s controlled document system are considered authoritative.
All drawings and 3D models are provided for reference only and are not controlled documents. Files may not reflect current revisions or design intent and shall not be used for manufacturing, inspection, or certification. Only officially released ThermOmegaTech drawings and documents issued through the company’s controlled document system are considered authoritative.
