Honeywell MP918A1081 Pneumatic Damper Actuator, High Force, Spring Return

Description

The Honeywell MP918A1081 is a high-force, spring-return pneumatic damper actuator engineered for reliable damper control in commercial HVAC and building automation systems. Designed to deliver consistent positioning performance across a wide range of operating conditions, this actuator is a trusted solution for VAV systems, air handling units, and other pneumatically controlled damper applications.

Key Features

• High actuator force for demanding damper control applications
• Spring-return design ensures fail-safe damper positioning on loss of air pressure
• 3½” stroke provides ample travel for a wide range of damper linkage configurations
• Wide humidity tolerance: 5–95% RH, suitable for diverse environmental conditions
• 25 PSI maximum operating pressure for compatibility with standard pneumatic control systems
• 5/32″ push-on barb connection for pilot air signal
• 1/4″ push-on barb connection for main air supply
• 10 PSI positive positioner span (5 PSI start point) for precise proportional control

Technical Specifications

• SKU / Part Number: MP918A1081
• Actuator Type: Pneumatic, Spring Return
• Actuator Force: High
• Stroke: 3½” (3.5 inches)
• Maximum Operating Pressure: 25 PSI
• Humidity Range: 5–95% RH (non-condensing)
• Pilot Air Connection: 5/32″ push-on barb
• Main Air Connection: 1/4″ push-on barb
• Positive Positioner Span: 10 PSI
• Positive Positioner Start Point: 5 PSI

Applications

• Variable air volume (VAV) damper control
• Air handling unit (AHU) damper positioning
• Commercial building HVAC pneumatic control systems
• Economizer and outside air damper actuation

Why Choose the Honeywell MP918A1081?

The MP918A1081 combines Honeywell’s proven pneumatic actuator engineering with a high-force output and spring-return fail-safe action, making it ideal for critical damper control where reliability is paramount. The integrated positive positioner ensures accurate, repeatable damper positioning across the full control range, reducing energy waste and improving system comfort. Push-on barb fittings simplify installation and minimize leak points in the pneumatic circuit.