TRAC Temperature Regulating Valves

TRAC Regulator manufactures a complete line of temperature regulating valves for military and commercial applications. The valves are designed for durability and dependability, and require no external source of power to operate. The TRAC Temperature Regulating Valve product line consists of:

 

TRAC Style ‘A’

trac-style-a_image The TRAC Style ‘A’ (Failsafe) temperature regulator is a self-sensing and self-actuated temperature regulating valve that automatically controls liquid or steam flow in response to temperature changes in the controlling medium. The regulating valve requires no external power source to operate or to detect temperature changes in the controlling medium. The TRAC Style ‘A’ is suitable for shipboard service.

Failsafe is a term invoked by the military specification to differentiate this type of equipment from the standard (non-failsafe) design. It describes the failure mode that the system designer must consider as safest for the system. For most applications where the TRAC Style ‘A’ (Failsafe) temperature regulator is specified, the valve is intended to fail cold. The failsafe temperature regulator will fail in the full open or full closed position (depending on valve action) with no means to adjust the valve to an intermediate position. If adjustment to an intermediate position after thermostatic element failure is a system requirement, then consider the TRAC Style ‘B’ temperature regulator.

The TRAC Style ‘A’ Temperature Regulator is available in three 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 and sterilizing equipment.

Body and trim categories: single seat (cone disc), balanced single seat, double seat direct acting – union end or flanged end connections, and double seat reverse acting – union end or flanged end connections
Fails closed (in a heating system, the valve fails cold)
Applicable specification: MIL-V-19772A / MIL-DTL-19772B TYPE II CLASS 1 (Failsafe)*

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.

Body and trim category: double seat reverse acting – union end or flanged end connections
Fails open (in a cooling system, the valve fails cold)
Applicable specification: MIL-V-19772A / MIL-DTL-19772B TYPE II CLASS 2 (Failsafe)*
trac-style-a-3way_image
THREE-WAY: Three-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.

Available with either union end or flanged end connections
Three-way valves for mixing service fail cold (hot seat shut)
Three-way valves for diverting service will fail to cooler (bypass seat shut)
Applicable specification: MIL-V-19772A / MIL-DTL-19772B TYPE I (Failsafe)*
*The military specification type and class generally associated with each type of valve action is included with each valve description. Departures from the military specification valve are available. These modifications include, but are not limited to, changes in body material, trim material, end connections and rated pressure.

Please refer to the TRAC Style ‘A’ Catalog or Contact Us for additional information.

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TRAC Style ‘B’

trac-style-b_image The TRAC Style ‘B’ temperature regulator is a self-sensing and self-actuated temperature regulating valve that automatically controls liquid or steam flow through the valve in response to changes in the temperature of the controlling medium. The regulating valve requires no external source of power to operate the valve or to detect changes in the temperature of the controlling medium. The valve can be set to control at any temperature within the limits of the temperature range stamped on the nameplate. The standard ranges for Style ‘B’ valves are provided with a 40° F adjustable temperature span. The TRAC Style ‘B’ is suitable for shipboard service.

TRAC Style ‘B’ product specifications:

DIRECT ACTING: Direct acting valves are used for heating services when 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.

Body and trim categories: single seat (cone disc), balanced single seat, double seat direct acting – union end or flanged end connections, and double seat reverse acting – union end or flanged end connections
Fails open (in a heating system, the valve fails hot)
Applicable specification: MIL-V-19772A / MIL-DTL-19772B TYPE II CLASS 1 (Non-Failsafe)*

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.

Body and trim category: double seat reverse acting – union end or flanged end connections.
Fails closed (in a cooling system, the valve fails hot)
Applicable specification: MIL-V-19772A / MIL-DTL-19772B TYPE II CLASS 2 (Non-Failsafe)*
trac-style-b-3way_image
THREE-WAY: Three-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.

Available with either union end or flanged end connections
Three-way valves for mixing service fail hot (cold seat shut)
Three-way valves for diverting service will fail to bypass (cooler seat shut)
Applicable specification: MIL-V-19772A / MIL-DTL-19772B TYPE I (Non-Failsafe)*
*The military specification type and class generally associated with each type of valve action is included with each valve description. Departures from the military specification valve are available. These modifications include, but are not limited to, changes in body material, trim material, end connections and rated pressure.

For most applications where the TRAC Style ‘B’ temperature regulator is specified, the system designer considers it acceptable for the valve to fail hot with means for the operator to be able to adjust the valve to any intermediate valve position. The manual override feature is furnished on all TRAC Style ‘B’ production valves. It provides for uninterrupted service in the event that the thermostatic element fails in operation.

Please refer to the TRAC Style ‘B’ Catalog or Contact Us for additional information.

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TRAC Style ‘P’

trac-style-p_image The TRAC Style ‘P’ (electrically failsafe) temperature regulator is a pilot-operated valve specifically designed to control steam supply to shipboard instantaneous heater systems. The valve will automatically regulate steam flow to the heater coil in response to changes in hot water temperature at the heater outlet. The standard range for Style ‘P’ valve is 120°-180° F. Other ranges are available and are provided with a 60° F adjustable temperature span.

TRAC Style ‘P’ product specifications:

Sizes: 1″ – 2″

Pressure Rating: 100 PSIG

Materials: Bronze Body, Stainless Steel Trim

Service: MIL-DTL-19772B, Type III Class 1 Series 100

End Connections: Union End Sil-Braze I/A/W MIL-F-1183

Please refer to the TRAC Style ‘P’ Catalog or Contact Us for additional information.

To prevent overheating upon failure of the thermostatic element, the valve is provided with an electrically operated safety feature. A solenoid valve is incorporated on the inlet side pilot tube line. The solenoid provided is normally closed. In order to operate the temperature regulator, the solenoid valve must be energized. Upon failure of the thermostatic element, loss of electric current to the solenoid, or if any other valve malfunction causes the hot water outlet temperature to overheat, the solenoid valve will close, shutting off inlet pressure to the valve piston, thereby closing the temperature regulating valve.

For detailed maintenance instructions for the TRAC Style ‘P’ product line: TRAC Style ‘P’ Commercial Manual

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