This Honeywell Pneumatic Valve Actuator is designed with an 8-inch stroke and a spring range of 70 cubic inches. The actuator operates on the principle of air pressure differential, converting this into mechanical motion to control valves in heating, ventilation, and air conditioning (HVAC) systems. It features a robust construction with a cast iron body for durability and longevity. The actuator is also equipped with a position indicator for visual confirmation of valve status. Its design allows for direct mounting to Honeywell V5011 and V5013 series valves without the need for linkages or calibration.