Passenger car freeze protection is a concern for rolling stock with potable water-bearing systems, typically supplying onboard toilets and kitchens. During frigid winter months, the water systems are at risk of freezing if the temperature drops too low. The results could be burst pipes and tanks, taking the car out of service and resulting in expensive and lengthy repairs.

During normal operation, a passenger train car’s heating will keep the water from getting too cold. However, when the heat is turned off for switching locomotives, during layovers or a power outage, the temperature inside of the cabin can quickly fall towards freezing. If the water in the system is not heated or drained it could freeze and potentially cause a lot of damage that can disrupt kitchen galleys and sanitary systems. To mitigate the risk of freezing pipelines, passenger train cars should have a freeze protection plan for winter weather.

ThermOmegaTech®’s line of GURU PC® passenger car freeze protection valves are self-operating, thermostatic drain valves that protect potable water-bearing systems from freezing. The GURU PC ¾” and 1″ valves monitor ambient temperatures and will automatically drain the water tanks if the air temperature falls to the valve’s set-point, 35°F, preventing burst piping and frozen tanks. Completely mechanical, with no outside power required, its high flow design allows for rapid draining, eliminating costly freeze damage.

Once the power and heat have been restored to the train, the GURU PC® will modulate closed again however, ThermOmegaTech® recommends using their electric heater assembly to quickly close the valve to refill the water system and get the car back into service as soon as possible.

The advanced, reliable GURU PC® valves increase up-time on passenger cars by preventing water lines from freezing before any damage can occur.

GURU® Rebuild Program

GURU PC® valves are recommended to be replaced every 18-24 months. ThermOmegaTech® offers a rebuild program where your maintenance personnel can quickly and easily replace the valve cartridge assembly in-line. To learn more, visit our Rebuild Program page.