Cooling Fluid Control Valve Overview
The HAT/RA is a self-actuating cooling fluid control valve that regulates the flow of cooling water, glycol, or other cooling media to help prevent equipment or processes from overheating. This thermostatic cooling valve can also function as a thermal relief valve, opening on rising temperature to relieve excess heat from the system.
For heating applications that require the valve to open as fluid temperature falls, use the HAT inline temperature control valve.
Valve Configurations
HAT/RA
Controls cooling media based on the temperature of fluid passing directly through the valve.
HAT/RA-LP
Adds controlled leakage so changing upstream fluid temperature reaches the actuator while the main valve is otherwise closed.
Design Features
- Exclusive Thermoloid® paraffin wax actuator
- Compact, low-mass design for responsive temperature control
- Corrosion-resistant –stainless steel body, fittings, spring, and plug
- Ram-type plug design for reliable shut-off
- Operates in any orientation and a narrow temperature band
- Two wrench flats for easy installation
- Wide choice of set points
- Unaffected by pressure variations
Typical Applications
Cooling Fluid Control
Typical cooling water and fluid temperature control applications include:
- Compressors
- Engines
- Heat exchangers
- Welding equipment
- Electrical equipment
- Molding equipment
- Die-casting machinery
Thermostatic Balancing
The HAT/RA-LP can also be used as a thermostatic balancing valve in systems with multiple cooling loads or zones in applications including injection, rubber, and plastic molding equipment, die casting, and platen processes.
Technical Documents
Specifications
- Sizes: ½”, ¾”
- Maximum Operating Pressure for B Port: 200 PSIG (13.8 bar)
- Maximum Operating Pressure for C Port: 150 PSIG (10.3 bar)
- Maximum Operating Pressure for D Port: 70 PSIG (4.8 bar)
- Maximum Temperature: Range 150ºF (83.3ºC) over set point with a limit of 300ºF (149ºC)
Ordering
| Part Number | Description |
|---|---|
| 144 – 202X00 – XXX | 1/2” HAT/RA B-Port |
| 144 – 212X00 – XXX | 1/2” HAT/RA B-Port all SS |
| 144 – 302X00 – XXX | 1/2” HAT/RA C-Port |
| 144 – 312X00 – XXX | 1/2” HAT/RA C-Port all SS |
| 145 – 502X00 – XXX | 3/4” HAT/RA D-Port |
| 145 – 512X00 – XXX | 3/4” HAT/RA D-Port all SS |
| 144 – 202X02 – XXX | 1/2” HAT/RA-LP B-Port 1/4 GPM |
| 144 – 212X02 – XXX | 1/2” HAT/RA-LP B-Port, all SS 1/4 GPM |
| 144 – 302X02 – XXX | 1/2” HAT/RA-LP C-Port, 1/4 GPM |
| 144 – 312X02 – XXX | 1/2” HAT/RA-LP C-Port, all SS 1/4 GPM |
| 145 – 502X02 – XXX | 3/4” HAT/RA-LP D-Port 1/4 GPM |
| 145 – 502X03 – XXX | 3/4” HAT/RA-LP D-Port 1 GPM |
| 145 – 512X02 – XXX | 3/4” HAT/RA-LP D-Port, all SS 1/4 GPM |
| 145 – 512X03 – XXX | 3/4” HAT/RA-LP D-Port, all SS 1 GPM |
Ordering & Configuration Notes
- Full open temperatures “XXX” available: 040°F, 045°F, 050°F, 060°F, 070°F, 075°F, 085°F, 095°F, 100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 130°F, 140°F, 150°F, 160°F, 170°F, 175°F, 180°F, 190°F, 200°F, and 210°F
- Closing temperature is typically 10°F below the opening temperature.
- Leak port flow rate specifications:
- All 144 Series (B and C-Port) leak flow rates at 60 PSIG (4.1 bar)
- All 145 Series (D-Port) leak flow rates at 40 PSIG (2.8 bar)
- Seal material compatibility:
- EPDM – air, water, steam, ketones, and synthetic hydraulic oils
- Viton – air, fuel, oil, gas, petroleum-based hydraulic oils
- Replace singular “X” with 1 for EPDM body seals; 2 for Viton body seals
Certifications
- NSF/ANSI/CAN 61 & 372 Certified options available.
How the HAT/RA Valve Works
The HAT/RA uses a thermal actuator to sense inline fluid temperature. As temperature rises into the valve’s operating range, the reverse-acting valve modulates open to increase cooling media flow. As temperature falls, the valve modulates toward closed to reduce flow.
HAT/RA-LP models maintain a small amount of controlled leakage while otherwise closed, allowing the actuator to respond to changing upstream fluid temperature.
