The Schneider Electric Barber Colman MK-4621 Valve Actuator is a high-performance component that provides precise control in HVAC systems. The actuator is highly effective in regulating fluid flow to copyright ideal environmental conditions, with a valve actuation range of 10-13 square inches. The MK-4621 Valve Actuator provides precise and responsive control over valves when installe... https://www.partshnc.com/10-13valve-actuator11sqin