Electric Linear Valve APPLICATION The ML6420 Non-Spring Return Electric Linear Valve Actuators are floating control actuators used with controllers that provide a switched or floating single-pole double-throw (spdt) output. These actuators operate standard Honeywell valves in heating, ventilating, and air conditioning (HVAC) applications. The ML7420 Non-Spring Return Electric Linear Valve Actuators are modulating control actuators [...]