Description
Schneider Electric (Barber Colman) MK-8801 Pneumatic Valve Actuator
The Schneider Electric (Barber Colman) MK-8801 is a proportional control, spring return pneumatic valve actuator engineered for reliable linear valve positioning in commercial HVAC and building automation systems. With a robust 100 square inch diaphragm area and a NEMA 1 enclosure, this actuator delivers consistent, accurate valve modulation in a wide range of heating, cooling, and process control applications.
Key Features
- Proportional control for precise, modulating valve positioning
- Spring return operation ensures fail-safe valve positioning on loss of air signal
- Linear movement design for direct-coupled valve stem actuation
- 100 square inch diaphragm area provides high thrust output for demanding valve applications
- Operating pneumatic signal range: 3–8 PSI
- 1/8″ NPT air connection for easy pneumatic line hookup
- 1″ nominal stroke for compatibility with a broad range of control valves
- NEMA 1 enclosure rating for standard indoor installations
Specifications
- Brand: Schneider Electric (Barber Colman)
- Model / SKU: MK-8801
- Actuator Type: Pneumatic, Proportional Control
- Action: Spring Return
- Movement: Linear
- Diaphragm Area: 100 square inches
- Pneumatic Signal Range: 3–8 PSI
- Air Connection: 1/8″ NPT
- Nominal Stroke: 1 inch
- Enclosure Rating: NEMA 1
Application
The MK-8801 is ideal for use in commercial building HVAC systems where pneumatic control is required for two-way or three-way modulating control valves on heating hot water, chilled water, and steam coil applications. Its spring return feature provides a dependable fail-safe position, making it a trusted choice for critical comfort and process control environments.







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