Description
The Honeywell ML6421B1040 Dcva, Nsr, 405 Fltg, 1 1/2 Inch Strk is a direct coupled valve actuator (DCVA) specifically designed for use in hydronic heating and cooling systems. Since it is a non-spring return (NSR) type, it needs an ongoing electrical signal in order to keep its position. The force (405 pounds) that the actuator is capable of exerting is indicated by the “405”. Lastly, the actuator’s maximum movement distance when completely open or closed is indicated by the “1 1/2 Inch Stroke” on the valve stem.To put it another way, this gadget regulates the flow of water or refrigerant in hydronic HVAC systems similarly to an electric switch. The DCVA opens or closes when an electrical signal is supplied to it, converting the signal into mechanical force.
