Honeywell 312817AA Pneumatic Actuator Assembly for VP512A Valve 3-8 PSI

The Honeywell 312817AA is a pneumatic actuator assembly designed specifically for use with VP512A, VP513, and VP517 series unit ventilator valves. This replacement actuator assembly features a spring return design with a 3 to 8 psi (21 to 55 kPa) operating range and delivers precise proportional control of steam and hot water in HVAC applications.

Key Features:

• Spring-operated pneumatic actuator with 1/2 inch stroke length
• Operating pressure range: 3 to 8 psi (21 to 55 kPa)
• Aluminum construction with durable Buna-N diaphragm
• Compatible with VP512A, VP513, and VP517 valve series
• Direct-acting design with spring return operation
• Suitable for use in hazardous locations

This actuator assembly is engineered for reliable, long-term performance in unit ventilator applications including commercial buildings, schools, hospitals, and industrial facilities. The Buna-N diaphragm provides excellent chemical resistance and durability, while the aluminum body ensures lightweight strength and corrosion resistance. The 1/2 inch stroke provides precise modulating control for optimal temperature regulation and energy efficiency.