Choose Grainger when you’re looking for replacement pneumatic controls for your HVAC system. Dependable pneumatic damper actuators provide proportional control of dampers in either independent or sequence operations. Pneumatic thermostats control pneumatic valves and damper actuators in heating and cooling applications. Sensing probes help determine air pressure in your HVAC system. They’re available in a variety of sizes and configurations. Choose from our selection of pneumatic HVAC controls and accessories including actuator mounting kits, adapter bonnets, ring pack packing kits, thread adapters, and more.