HAT
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IN-LINE TEMPERATURE CONTROL VALVE BENEFITS • Controls fluid return temperatures - ideal for glycol tracing • Maintains constant discharge temperatures • Self-operating, no power or signal required • Improves system efficiency • Unaffected by pressure variations • Two wrench flats for easy installation DESIGN FEATURES • • • • • • • Exclusive Thermoloid® thermal actuator 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 Optional leak port (LP) available APPLICATIONS To control temperatures in glycol heat tracing systems, HAT valves will maintain the discharge temperature. When glycol temperature exceeds the set point, the valve will modulate closed. As heat loss occurs and glycol cools to below the set point, the valve will open to allow warmer glycol to circulate. HAT valves can act as freeze protection for condensate systems. HAT valves open when temperatures fall to allow condensate to discharge before freezing. OPERATION A thermostatic element inside the valve senses temperature and if this falls below the set point, the valve modulates open to allow flow. When the temperature increases to near the set point, the HAT valve modulates closed. HAT valves are available with built-in leakage to allow bypass flow. SAMPLE APPLICATIONS In commercial aircraft, high temperature water can unexpectedly travel to the cold water lines. HAT valves on cold water lines will limit flow when excessive temperatures are detected, preventing scalding of passengers and crew. HAT valves used on tank heating coils limit the temperatures of the heating element. By closing before coil temperatures are too high, the HAT valves reduce the risk of over-temperature damage. When used as a subcooling steam trap, HAT valves reduce problems associated with overheating. When used as a sampling system safety shutoff, HAT valves will remain open as long as sample temperatures are under the set point. If the sample temperature increases, the valve will shut off, protecting analyzing equipment from damage due to high temperature.

HAT IN-LINE TEMPERATURE CONTROL VALVE PARTS & MATERIALS STANDARD FLOW1 OPERATING SPRING RAM-TYPE PLUG THERMAL ACTUATOR ACTUATOR CARRIER REVERSE FLOW SEAT RING SEAL BODY - HALF BODY - HALF Port Size Maximum Temperature 150ºF(66ºC) over set-point limit 300ºF(149ºC) NOTES 1. Flow direction is reversed in valves that close over 210°F (98.9°C). Reverse flow valves are rated for 150 PSIG (10.3 BAR). 2. Seal Material compatibility: a. EPDM - air, glycol, water, steam, ketones, and synthetic hydraulic oils. b. Viton - air, fuel, oil, gas, petroleum-based hydraulic oils. c. Kalrez d. Silicone 3....