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The Macon one-pipe steam valve assembly consists of the reliable MTW direct mounting thermostat. The thermostatic head contains a temperature sensitive wax which expands and contracts on a rise and fall of temperature in the sensed area. When the temperature rises above the temperature selected, pressure from the expanding wax closes the valve, preventing or restricting the flow of steam through the radiation unit. When the room temperature drops below the selected temperature, the valve opens and allows an increase of steam flow through the radiation unit. This modulating process continues automatically to maintain the temperature you selected. The OPSK controls room temperature by regulating the amount of air and steam in the radiator.

Features & Benefits:
  • Compact dimensions
  • Nickel-plated, forged brass valve
  • Thermostat may be locked at or limited to any desired temperature or temperature range
  • Actuators may be changed without shutting down the system
  • Valve may be installed by dropping the system down to zero pressure
  • Individual room control for greater comfort
  • Replaceable insert
  • Stainless steel spindle
  • Fuel savings up to 30%
  • Nonelectric - fully automatic
  • Prevents over- and under-heating
  • Reliability
  • Remote thermostats available - call or write for the distributor nearest you!
  • Vent and vacuum breaker included
  • The OPSK helps to minimize large temperature swings inherent in one pipe steam systems.

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Product Type:
Connection Type:
Body Pattern:
Operating Temp Range:
46° - 82°F
Max Temp (F):
Nickel Plated Brass
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