Honeywell MP909H1331 Pneumatic Damper Actuator 10 PSI Spring Range 4-Inch Stroke

The Honeywell MP909H1331 is a pneumatic damper actuator designed for proportional control of variable volume terminal units, mixing boxes, and small to medium-sized dampers in HVAC systems. This actuator features a 4-inch stroke length and operates on a 10 PSI spring range, providing precise and reliable air flow control in commercial and industrial applications.

Key Features:

• Rolling diaphragm operated design for smooth, consistent performance
• Positive positioner included (MP909H series feature)
• Low friction shaft bearing for extended service life
• Close tolerance on operating range and stroke for accurate control
• Non-overlapping spring ranges enable sequence operation with other actuators
• Corrosion resistant materials for durability
• Maximum operating pressure of 25 PSI
• Dual barbed air connections: 1/8 NPT with fittings for 5/32 or 1/4 inch O.D. tubing

This actuator is engineered for industrial processes requiring precise proportional control and is available in various operating ranges for either independent operation or sequence operation with other actuators. The MP909H1331 serves as a replacement for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell actuator models.