Freeze Protection Valves

Protect system fluid from freezing with Rostra Vernatherm's freeze protection valves.

Vernatherm freeze protection valves use reliable, non-electric, self-contained Vernatherm paraffin wax motors (thermal actuators) which automatically respond to temperature fluctuations. Usually in freeze protection applications, the valve port opens on temperature drop, allowing liquid that would normally freeze to be discharged and replaced with warmer fluid within the system.  When warmer temperatures are detected by the thermal actuator within, the valve will automatically close the valve and the discharge cycle stops.

This cycle will repeat as often as necessary to prevent freezing.  The amount of fluid discharged depends on ambient air temperature, and fluid temperature.  The system is functioning properly when fluid is being discharged from the valve in near freezing conditions.

Design features that sets these valves apart from all competition

• Anti-seize feature ensures longevity and durability
• Anti-insect design prevents any insect from making this valve it's home and causing a failure
• Compact design, that weighs only 4oz
• UV resistant body material
• Stainless steel inlet debris screen

Depending on your type of system and fluid volume, you may be required to discharge fluid at different temperature settings.
Standard Models:

35F Relief Temperature Models

• 4504-00-00 - Angled DesignSingle Threaded Design
• 4508-00-00 - Straight flow Double Threaded Design
• 4506-00-00 - Straight flow design single threaded design

45F Relief Temperature Models

• 4504-01-00 - Angled Design Single Threaded Design
• 4508-01-00 - Straight flow double threaded design
• 4506-01-00 - Straight flow design single threaded design