Description
The Schneider Electric (Barber Colman) MK-2690 is a proportional control, spring return pneumatic valve actuator engineered for reliable linear valve positioning in commercial HVAC and building automation systems. Housed in a rugged NEMA 1 enclosure, this actuator delivers precise, repeatable control across a wide range of pneumatic applications.
Key Features
- Proportional control for accurate, modulating valve positioning
- Spring return design ensures fail-safe valve positioning on loss of air pressure
- Linear movement for direct, straightforward valve actuation
- NEMA 1 enclosure provides protection in standard indoor environments
- 6 square inch diaphragm area for reliable actuation force
- 1/8″ NPT air connection for easy pneumatic system integration
- 1/2″ nominal stroke to match a wide range of compatible valve bodies
Pressure Range Options
- 3–7 PSI control range
- 5–10 PSI control range
- 8–13 PSI control range
Specifications
- Brand: Schneider Electric (Barber Colman)
- Model: MK-2690
- Actuator Type: Pneumatic, Proportional Control
- Action: Spring Return
- Movement: Linear
- Enclosure Rating: NEMA 1
- Diaphragm Area: 6 square inches
- Air Connection: 1/8″ NPT
- Nominal Stroke: 1/2″
- Available Control Ranges: 3–7 PSI, 5–10 PSI, 8–13 PSI
Applications
- Commercial HVAC valve control in air handling units and fan coil systems
- Building automation and direct digital control (DDC) pneumatic systems
- Hot water and chilled water valve modulation
- Steam valve control in hydronic heating systems
- Retrofit and replacement for existing Barber Colman pneumatic valve actuators
The MK-2690’s spring return mechanism ensures the valve returns to its fail-safe position whenever pneumatic signal pressure is lost, providing an added layer of system protection. Its 1/8″ NPT air connection and 1/2″ stroke make it compatible with a broad selection of valve bodies commonly found in commercial building systems. Select the appropriate PSI range (3–7, 5–10, or 8–13) to match your system’s pneumatic control signal requirements.
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