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Model D:

Three way theromstatic valve

AMOT Model D Thermostatic Valves are fully automatic, 3-way fluid temperature controllers for diverting applications.  They are used to provide reliable control lubrication oil cooling systems. These valves are suitable for process control and industrial applications where fluids must be diverted depending on their temperatures. They may also be applied to cogeneration systems to control temperatures in the heat recovery loop assuring proper engine cooling and maximizing heat recovery.


Features and Benefits

  • Flow rates of 1500-2800 USgpm

  • Tamper-Proof Temperature

  • Setting of 80F - 230°F

  • Completely self-contained

  • Positive 3-Way valve action

  • Available in cast Iron, Steel, Ductile Iron and Bronze.


  • Engine and compressor cooling system

  • Lube oil systems

  • Cogeneration heat recovery loops

  • Process control

  • Temperature mixing or diverting


Temperature ranges:  27-110°C  (80-230°F)

Materials:  House in cast iron, steel, ductile iron or bronze

Connections: Threaded or flanged

Other specifications:

Internal trim materials: Stainless Steel & Bronze

Standard seal material: Buna N/Nitrile


The valve is supplied with the temperature element assemblies factory-set to the nominal temperature setting. Temperature is sensed at Port A which remains open to Port B (bypass) until the fluid temperature reaches a point 8 – 10°F below the nominal setting. As the temperature continues to rise, the sliding valve moves to close off Port B and open Port C (connected to the cooler or heat exchanger.) Port B is fully closed 8 – 10°F above the nominal setting. The valve continually modulates the fluid flow to maintain the nominal temperature. For optimum control, the system should be sized so about 1/2 the total fluid flow is passing through the cooler at full load.

Download data sheet for D-valve >>

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