The Macon one-pipe steam valve assembly consists of the reliable EVO 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.
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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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The OPSK can be fitted with any of our Macon Controls operators:
EVO (Standard) - Direct mount
EVO-Z - Direct mount w/Remote sensor
EVOL - Wall mount w/Remote dial
EVOLZ - Remote dial & Remote sensor
MTW-28-SS2 - Direct mount w/Stainless Steel
VA Series - electric actuator
ZMC-DDC - Electric actuator for DDC systems
ZMC-ES - Electric Actuator w/End switch
MVA-2-10 - Motorized Electric actuator
MPVC-0-10 - Motorized Electric actuator
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Maximum Temperature: 248ºF
Disc Material: EPDM
Valve Body Material: Forged, nickel-plated brass
Body Style: Straight Pattern
Connections: 1/8ʺ male NPT, fits in vent tapping of the radiator
Temperature Setting Range: 46ºF to 79ºF
Maximum Movement: 0.125” (3mm)
Movement: per 1 °F change in ambient .007 (.15mm)
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