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Model BR:

Three way thermostatic valve

The AMOT model 6B steel and stainless steel thermostatic valve may be mounted in any position and uses the proven expanding wax principle to actuate the 3-way temperature element assemblies.

The valve is ideal for use in the lube oil skid building sector where demand has increased due to higher design pressures needed in the complete module, as well as the introduction of legislative driven specifications.

Features and Benefits

  • No external power source required – simple, low cost installation

  • No user setting needed – "fit and forget solution"

  • Small number of parts – simple maintenance and low cost of ownership

  • Robust design capable of high vibration and shock applications

  • Easy installation, operates in any mounting position

  • Automatic self-sensing control with positive proportional valve action


  • Lubricating oil temperature control

  • Jacket water high temperature (HT)

  • Secondary water low temperature (LT)

  • Heat recover

  • Water saving applications

  • Boiler inlet temperature control

  • Co-generation, cooling towers

  • Temperature mixing or diverting

  • Engine and compressor cooling systems

Temperature ranges:        13-116°C  (55-240°F)

Other specifications:

Flow Rates: 150 - 280 m3/hr660 - 1230 US gpm

Sizes: 150 mm6"

Body Material: Steel, stainless steel

Pipe Connections: Flanged: DIN, JIS, ANSI, US Navy

Amot BR-valve model code example: (See also table in data sheet p. 8)


3BRCB1000100AA: 3'' valve with manual override (BO), cast iron(C), flange PN10 (B), 100°F element  (100), standard element without override with buna N/Nitrile seal(01), leak hole size (0), leak hole number (0, no customer customization (AA)

33BRCB1000100AA: same as above, but with three elements

4BRCB1000100AA: same as above, but 4'' valve

4BRCB1250100AA: same as above, but with 125°F element


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 5 - 10°F (3 - 6°C) 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 (4 - 6°C) 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 half the total fluid flow is passing through the cooler at full load.

Download data sheet for BR-valve >>

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