Description
Schneider Electric (Barber Colman) MK-4611 Pneumatic Valve Actuator Overview
The Schneider Electric (Barber Colman) MK-4611 is a precision-engineered pneumatic valve actuator designed for reliable proportional control in commercial and industrial HVAC applications. Featuring a spring return mechanism and linear movement, this actuator delivers consistent, repeatable valve positioning for heating, cooling, and process control systems. Its robust NEMA 1 enclosure makes it well-suited for indoor installations where protection from dust and light contact is required.
Key Features
- Proportional control for precise, modulating valve positioning
- Spring return operation ensures fail-safe valve positioning on loss of air signal
- Linear movement for direct, smooth stroke actuation
- NEMA 1 enclosure rated for indoor use
- 5–10 PSI pneumatic operating range for compatibility with standard pneumatic control systems
- 11 square inch actuator diaphragm for reliable force output
- 1/8″ NPT air connection for easy integration with pneumatic tubing and fittings
- 1/2″ nominal stroke for precise valve travel
Specifications
- Brand: Schneider Electric (Barber Colman)
- Model / SKU: MK-4611
- Control Type: Proportional
- Actuator Type: Pneumatic, Spring Return
- Movement Type: Linear
- Enclosure Rating: NEMA 1
- Operating Pressure Range: 5–10 PSI
- Diaphragm Area: 11 square inches
- Air Connection: 1/8″ NPT
- Nominal Stroke: 1/2″
Applications
- Commercial HVAC hydronic valve control
- Building automation and pneumatic control systems
- Heating and cooling coil valve actuation
- Industrial process control requiring proportional pneumatic actuation
Why Choose the MK-4611?
The MK-4611 from Schneider Electric’s legacy Barber Colman line is a trusted solution for facilities engineers and HVAC contractors who rely on pneumatic control infrastructure. The spring return design provides an added layer of safety, automatically returning the valve to its fail-safe position whenever pneumatic signal pressure is lost. Combined with a standard 1/8″ NPT air connection and a compact 1/2″ stroke, this actuator integrates seamlessly into existing pneumatic systems with minimal modification.
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