Operation

The DTV is installed into the drain line such that the hot effluent passes over the thermal actuator which controls the cold-water inlet port. If the hot effluent is above the specified set point of the valve, the actuator senses the rising temperature and signals the DTV to open to allow the injection of cold water to temper down the discharge fluid before it reaches the drain.

As the hot effluent cools, the DTV automatically modulates to reduce the cold-water inlet flow. At about 10°F below the full open temperature, the cold-water inlet is fully closed again to conserve water.

The DTV provides a convenient, economical, and easy to use method of tempering hot effluent. Since the DTV is open only when the effluent exceeds the specified set point temperature, it also conserves water by automatically turning off cold water when not needed.

Typical Applications

The DTV (Drain Tempering Valve) is typically used in commercial dishwashers (warewashers), boiler blowdown drain lines, humidifiers, autoclaves, sterilizers, or any application that discharges scalding water to drains or sewers. Water temperatures entering the sewer system exceeding 140°F can lead to failed inspections, fines, business interruptions, or injury and damage to personnel and equipment.

Choosing Your Size

The DTV valves are available with ½”, ¾”, and 1′′ NPT water connections. To choose the valve right for your system you will need to calculate your Cv.

Ordering