Description
Schneider Electric (Barber Colman) MK-4641 Proportional Pneumatic Valve Actuator
The Schneider Electric (Barber Colman) MK-4641 is a precision-engineered proportional control pneumatic valve actuator designed for reliable performance in commercial HVAC and building automation applications. Featuring a spring return mechanism and linear movement, this actuator delivers accurate, repeatable valve positioning in response to pneumatic control signals — making it an ideal choice for variable air volume systems, hydronic control valves, and other proportional control applications.
Key Features
- Proportional control with linear movement for precise valve positioning
- Spring return operation ensures fail-safe positioning on loss of air signal
- 3–13 PSI pneumatic control signal range for standard pneumatic control compatibility
- 11 square inch diaphragm area for reliable actuating force
- 1/8″ NPT air connection for easy pneumatic line hookup
- 1/2″ nominal stroke for accurate linear valve travel
- NEMA 1 enclosure rating suitable for indoor, general-purpose installations
Specifications
- Brand: Schneider Electric (Barber Colman)
- Model / SKU: MK-4641
- Control Type: Proportional
- Actuator Type: Pneumatic
- Movement Type: Linear
- Return Type: Spring Return
- Control Signal Range: 3–13 PSI
- Diaphragm Area: 11 square inches
- Air Connection: 1/8″ NPT
- Nominal Stroke: 1/2″
- Enclosure Rating: NEMA 1
Applications
- Commercial HVAC pneumatic control systems
- Hydronic heating and cooling valve actuation
- Variable air volume (VAV) terminal unit control
- Building automation and direct digital control (DDC) interface applications
- Fan coil unit valve control
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