What is a mid-position valve actuator?
What is a mid-position valve actuator?
A replacement Mid-position motorised zone valve actuator. It is to be used for the flow control of central heating or hot water in ‘Y plan’ central heating systems. By doing this it regulates flow simultaneously for hot water and central heating.
What does an actuator do in a heating system?
An actuator is the part of the heating system that is responsible for moving or controlling it. It requires a control signal and source of energy (usually an electric current). The actuator responds to the control signal by converting the energy into mechanical motion.
How does a mid-position valve work?
How the Mid-Position Three Port Valve works. The spring pulls the valve to open the flow through port B (traditionally connected to the hot water cylinder’s heating coil), while the motor winds it towards opening port A (feeding the radiator circuit).
How does a Drayton mid position actuator work?
Drayton mid-position valves allow the flow of water from the valve inlet to be directed to either of two outlets, or through both at the same time (mid-position).
Is the Drayton mid position valve actuator backwards compatible?
Drayton have changed the design, and decided to make the new one so that it was not backwards compatible. So the new Drayton heads don’t fit and the old ones have been made obsolete and not stocked anymore. If the new one did fit then the cheapest I have found is £58.
Why is the actuator off on a diynot hot water heater?
If you have the actuator off then it will pass down both because there’s nothing actually holding it in the position no matter where you place it. The spring holds the valve tightly shut on hot water and the motor keeps it under tension for the central heating position.
Can a actuator be removed from a valve?
With the actuator removed from the valve body. By using the programmer and tweaking the thermostats, select the three alternatives in turn. ie DHW only, Heating only and Both (it may be best to turn off the power to the system before each trial, at which time the actuator should definitely return to W).
