Closed Until Temperature Rises—Valves that are closed until temperature rises are also known as reverse-acting valves. They’re commonly used to cool oil or water from heat exchangers, chillers, and compressors. As the temperature in your tank or pipeline rises to the set temperature, the valve opens to let in cold water or oil. When the tank or pipeline temperature cools to the set temperature, the valve closes again.

Open Until Temperature Rises—Valves that are open until temperature rises are also known as direct-acting valves. They’re often used with boilers and steam tables in washing and sterilizing applications. As the temperature in your tank or pipeline rises to the set temperature, the valve closes. As the tank or pipeline temperature falls below the set temperature, the valve opens again to let in hot water or steam.

Mixing Valves with Dial Thermometer—Dial thermometers display the sensor temperature. The dial can be rotated for easy viewing.