Operation
As the fluid temperature increases to within the operating range of the HAT/RA, the thermal actuator modulates the valve open. If the fluid temperature is above the acceptable range, the valve will continue to modulate open allowing additional fluid discharge. As the outlet temperature falls, the valve then modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature even as operating conditions vary.
Benefits
Controls cooling fluid return temperatures – ideal for glycol and water
Maintains constant discharge temperatures
Improves system efficiency
Unaffected by pressure variations
Conserves water
Design Features
Stainless steel body, fittings, spring, and plug
Corrosion resistant – long service life
Operates in narrow temperature band
Compact low mass – fast response
Two wrench flats for easy installation
Ram-type plug for reliable shut-off
Typical Applications
The HAT/RA reverse acting valve may be used to regulate the flow of cooling water, glycol or other cooling media in applications requiring economical removal of heat from equipment or a process. Since the HAT/RA valves open on rising temperatures, they can be used in many thermal relief valve applications.
Operation
As the fluid temperature increases to within the operating range of the HAT/RA, the thermal actuator modulates the valve open. If the fluid temperature is above the acceptable range, the valve will continue to modulate open allowing additional fluid discharge. As the outlet temperature falls, the valve then modulates toward the closed position, reducing flow. This modulating action maintains a relatively constant fluid temperature even as operating conditions vary.
Benefits
- Controls cooling fluid return temperatures – ideal for glycol and water
- Maintains constant discharge temperatures
- Improves system efficiency
- Unaffected by pressure variations
- Conserves water
Design Features
- Stainless steel body, fittings, spring, and plug
- Corrosion resistant – long service life
- Operates in narrow temperature band
- Compact low mass – fast response
- Two wrench flats for easy installation
- Ram-type plug for reliable shut-off
Typical Applications
The HAT/RA reverse acting valve may be used to regulate the flow of cooling water, glycol or other cooling media in applications requiring economical removal of heat from equipment or a process. Since the HAT/RA valves open on rising temperatures, they can be used in many thermal relief valve applications.
