Honeywell MP918B1154 Pneumatic Damper Actuator High Force 8-13 PSI

The Honeywell MP918B1154 is a high-force pneumatic damper actuator designed for proportional control of medium- to large-size dampers in commercial and industrial HVAC systems. This rolling diaphragm, piston-type actuator provides reliable, precise damper blade positioning to control airflow in variable air volume systems and zone control applications.

Key Features:

• Rolling diaphragm operation with low friction shaft bearing for long service life
• Spring range: 8-13 PSI operating pressure with spring return fail-safe mode
• 3.5-inch stroke length for positive damper control
• 23.8 square inch diaphragm effective area for high force output
• Barbed fitting for 1/4-inch OD plastic tubing air connection
• Operating temperature range: -20°F to 158°F (-29°C to 70°C)
• Maximum operating pressure: 25 PSI
• Operating humidity range: 5 to 95% RH non-condensing
• Zero air consumption design for energy efficiency
• Close tolerance on operating range and stroke for accurate positioning
• Non-overlapping spring ranges allow for sequencing applications
• UL Components Recognized (File R18118)

Construction:

• Deep-drawn aluminum body for durability and corrosion resistance
• Versatile mounting and connecting hardware included
• External mounting bracket with crank arm and pushrod assembly
• Can be mounted in multiple orientations for installation flexibility

The MP918B1154 is suitable for controlling dampers in air handling units, VAV boxes, economizer systems, and other commercial HVAC applications requiring reliable, proportional damper control. Its robust construction and precise control characteristics make it an ideal replacement device for most competitor products.