Model R - Thermostatic Valves

Features

● Flow Rates of 12 - 116 USGPM

● Weldable Connections
~ Element Easily Removed While Valve Remains In-Line

● Tamper-Proof Temperature Settings

● Minimal Leakage Paths to Atmosphere

● Ideal for Refrigeration Service with Ammonia or other Refrigerants

Operation

The valve is supplied with the temperature element assembly factory-set to the nominal temperature set-ting. 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 continu-ally modulates the fluid flow to maintain the nominal temperature. For optimum control, the system should be sized so about half the total fluid flow passes through the cooler at full load.

For long life, AMOT Model R valves should not be exposed to continuous temperatures exceeding 65°F above their nominal temperature setting. For occa-sional short periods, such as 1/2 hour, they can be exposed to temperatures up to 90°F above their nomi-nal setting, but 250°F is the maximum temperature allowable.

Specifications

Valve Body ................................................... Steel Internal
Trim Materials ......... Steel/Stainless Steel/Brass
Standard Seal Material..................................... Neoprene
Maximum Differential Pressure ............. 20 psi (140 kPa)
Valve Pressure Rating ...................... 500 psi (3447 kPa)
Net Shipping Weight ........................................... 7-15 lbs