Valves and actuators are responsible for ensuring reliable functioning of HVAC systems all over the world. Damaged actuators or valves in a HVAC system used to create a large field issue. Replacing the valve along with the actuator is not always a sensible solution. Taking a system off-line to replace numerous valves is not only laborious, its expensive. Facilities can lose thousands of dollars a day during maintenance shut-down. With retrofit solutions, this problem simply goes away. Valves and actuators can be quickly and conveniently up-fitted without any interruption in service.