TRAC STYLE 'D' TEMPERATURE REGULATOR

The TRAC Style ‘D’ temperature regulator is a pneumatic actuated temperature regulator. This type of regulator requires an external source of compressed air controlled by a temperature pilot. The Style ‘D’ valve is designed to be compatible with virtually any manufacturer’s temperature pilot (controller). TRAC Regulator does provide temperature pilots, available in direct acting (rising bulb temperature increases control pressure) and reverse acting (rising bulb temperature decreases control pressure)
control modes. The temperature pilot meets the hi-shock requirements
of MIL-S-901.

The TRAC Style ‘D’ temperature regulator is basically a modification to the Style ‘B’ regulator, where an air signal is introduced into the bellows to control valve action. The manual override feature is furnished on all Style ‘D’ production valves. It provides for uninterrupted service in the event that the bellows fails in operation. By adjusting the manual override wheel, the operator can modulate the valve to any position between full open and
full closed.

The TRAC Style ‘D’ Temperature regulator is available in two air signal ranges (1/2- 6 psig and 5-15 psig) and three basic types of valve action:

DIRECT ACTING: Direct acting valves are used for heating services where a rise in temperature tends to close the valve. A direct acting valve is generally used for controlling the temperature of any steam heated systems such as hot water tanks, steam tables, sterilizing equipment, etc…
MIL-V-19772A TYPE II CLASS 1 (Modified for Pneumatic Control)

REVERSE ACTING: Reverse acting valves are used for cooling services where a rise in temperature tends to open the valve. A reverse acting valve is generally used for controlling the temperature of cooling system recirculating lines, heat exchangers, environmental air cooling, etc…
MIL-V-19772A TYPE II CLASS 2 (Modified for Pneumatic Control)

THREE WAY: 3-Way valves are used for mixing hot and cold liquids to deliver liquid to the outlet at a predetermined temperature, or to divert the inlet flow of liquid to a heat exchanger or bypass based on the controlling condition.
MIL-V-19772A TYPE I (Modified for Pneumatic Control)

For more information on the TRAC Style ‘D’ product line:
TRAC STYLE ‘D’ CATALOG

For detailed maintenance instructions for Navy shipboard installations:
TRAC STYLE ‘D’ NAVY MANUAL S6435-PH-MMC-010
(This document is for official use only and distribution is controlled by the United States Navy. Copies of this document are not available online)