The Johnson Controls V-3000-8012 Exposed Pneumatic Actuator is designed to provide precise control over HVAC systems. This actuator weighs about 0.75 lbs., has an 8" stroke length, and can work at a maximum supply pressure of 25 PSI. In HVAC applications, it regulates valves to control the flow of steam, water, or air by translating pneumatic signals into mechanical action. https://www.partshnc.com/pneumatic-valve-actuator-act-25-max-for-johnson-controls-part-v-3000-8012