Four Port Thermal Control Valves - Bypass, Relief, Diversion

four port thermal valve Four Port Thermostatic Control Valves ensure the proper operating temperature for any mechanical system, thanks to the exclusive aerospace technology used for accurate temperature control.  These valves are powered by a thermal actuator and are designed for each customer’s specific function needs.  These valves can regulate fluid in any temperature range from 30F to 300F.

Typically, these valves are installed in a system where temperature of a fluid must be regulated.  Installed in parallel with a heat exchanger, they divert fluid to be cooled when needed.  When cooling is not necessary, the valve simply passes fluid to the outlet.  Should the temperature continue to rise, a built-in pressure relief will protect your cooling system. The valve senses the fluid temperature 100% of the time while the system is on or off, and requires no power source.

Designed for easy installation and no maintenance, the four port valve is constructed of lightweight CNC machined aluminum and standard Viton rubber seals.  It is available in ¼” and ½” port sizes, with connections of various ports such as male or female NPT, AN or SAE.  Other materials are available for the valve body upon special request

 

four port valve 4 port valve

Advantages

  • Customizable
  • Repeatable
  • No external power source
  • No maintenance
  • Selectable temp range
  • Replaceable cartridge
  • Safety pressure relief
Cold fluid flows out of the valve due to a difference in pressure Hot fluid closes the channel, forcing fluid to flow to a heat exchanger for cooling and is then allowed to exit  

 

Material Specs

General Body
  • Body: 2024 Aluminum
  • Control Valve: 2024 Aluminum
Actuator Element
  • Piston: 303 SST’L
  • Guide: 360 ½ Hard AMS 4610
  • Cup: 353 Brass Rod
Flow Test Results for 1/4” Port Model
  • Substrate: Mil-L-7808
  • Pressure: 30 PSI
  • Flow: 16-18 GPM
  • Pressure Drop: 4 PSIG
Pressure Test Results for 1/4” Port Model
  • Max Tested: 1200 PSI
  • Guaranteed: 600 PSI
Product Characteristics
  • 100% CNC Parts
  • Temp Range 30 thru 300F
  • Temp Set at Factory
  • Variety of Rubber Seals
    • Viton
    • Nitrile
four port thermal valve
  No Cooling Required: The temperature of the system fluid is not in need of cooling, and the heat exchanger is bypassed.  This occures due to the pressure differential between the path to the heat exchanger vs the path directly back into the system.
4 port thermal valve
  Cooling Required: The temperature of the system fluid has reached the point where cooling is needed, and the valve has extended.  When the valve extends, it seats itself on the valve seat, sealing off the lower region of the housing from the upper chamber.  When the upper chamber is isolated, fluid has no other location to flow than through the heat exchanger to be cooled, then back through the sealed upper chamber out of the housing and ultimately back into the system.

 

thermal valve tip

Safety Pressure Relief:
Under normal pressure, the valve stays closed, directing hot fluid be cooled by the heat exchanger. Excessive pressure pushes up on the valve, compressing the spring and allowing fluid to flow straight out of the system without being directed to the heat exchanger. When the valve is closed, it sits at the bottom line. Excessive pressure pushes the spring to move the valve to the upper position pictured in the diagram

 

 

 

Four Port Valve Examples

four port manifold four port housing four port manifold