Description
The Schneider Electric (Barber Colman) MK-6801 is a professional-grade pneumatic valve actuator engineered for precise proportional control in commercial HVAC and building automation systems. Featuring a spring return mechanism and linear movement design, this actuator delivers reliable, repeatable valve positioning across a wide range of hydronic and pneumatic control applications.
Key Features
- Proportional control for accurate, 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
- NEMA 1 enclosure for indoor installation protection
- 3–8 PSI pneumatic input signal range
- 50 square inch diaphragm area for high thrust output
- 1/8″ NPT air connection for easy pneumatic line hookup
- 1″ nominal stroke for precise valve travel
Specifications
- Model: MK-6801
- Brand: Schneider Electric (Barber Colman)
- Control Type: Proportional
- Actuator Type: Pneumatic Valve Actuator
- Return Type: Spring Return
- Movement Type: Linear
- Enclosure Rating: NEMA 1
- Pneumatic Signal Range: 3–8 PSI
- Diaphragm Area: 50 square inches
- Air Connection: 1/8″ NPT
- Nominal Stroke: 1 inch
Applications
- Commercial HVAC valve control in pneumatic building automation systems
- Hydronic heating and cooling coil valve actuation
- Air handling unit (AHU) control valve applications
- Retrofit and replacement for legacy Barber Colman pneumatic actuator installations
The MK-6801’s robust 50 square inch diaphragm delivers the thrust needed for reliable valve actuation, while the spring return mechanism provides a dependable fail-safe position whenever the pneumatic signal is lost. The NEMA 1 enclosure makes it suitable for standard indoor mechanical room installations. The 1/8″ NPT air connection simplifies integration into existing pneumatic control tubing networks.
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