The KMC Controls MCP-8031-3102 Smoke Control Damper Actuator precisely regulates airflow in HVAC systems. This actuator has a size of 1-11/16 inches and a pressure range of 5-10 PSI to provide effective control of smoke and air movement in essential ventilation system applications. Made of durable metal with a plastic bushing it is built to last and damage well. In a pneumatically wor... https://www.partshnc.com/mcp-8031-3102-kmc-controls-actuator-mtl-5-10-plasticbsh