Operation
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 modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature and reduces wasted water and energy.
Typical Applications
The HAT/RA-HP 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.
Design Features
- 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 a narrow temperature band
Benefits
- 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
- NSF/ANSI/CAN 61 & 372 Certified
Ordering
PART NUMBER1,2 | DESCRIPTION |
154 - 010X00 - XXX | 1/2” HAT/RA-HP-M/F |