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actuator

An actuator is a component of a machine that is responsible for moving and controlling a mechanism or system, for example by opening a valve. In simple terms, it is a "mover".
An actuator requires a control signal and a source of energy. The control signal is relatively low energy and may be electric voltage or current, pneumatic, or hydraulic fluid pressure, or even human power. Its main energy source may be an electric current, hydraulic pressure, or pneumatic pressure. When it receives a control signal, an actuator responds by converting the source's energy into mechanical motion. In the electric, hydraulic, and pneumatic sense, it is a form of automation or automatic control.
An actuator is a mechanism by which a control system acts upon to perform an operation or task. The control system can be simple (a fixed mechanical or electronic system), software-based (e.g. a printer driver, robot control system), a human, or any other input.

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  1. M

    Hot water temperature problem

    I have a Glow Worm 24HX Condensing boiler on the ground floor with a pump in the same cupboard, a hot water storage cylinder in the airing cupboard upstairs (Kingspan 1500 x 450 grade 3, 162 Litre. cylinder) in the eaves area I have another pump (both pumps are Salus MP200 domestic circulating...
  2. G

    can i use a mid position actuator to replace a zone valve actuator

    can i use a mid position actuator to replace a zone valve actuator
  3. J

    How to replace actuator pin valve (uponor)

    I have an actuator pin which is leaking when closed, i have swapped the actuator itself but that has not resolved the problem. I have ordered a replacement actuator valve but I'm not sure what i need to do to replace,,, if i put a spanner on it straight away I'm guessing that water will go...
  4. C

    Baxi diverter valve actuator issue

    Hi. Have an issue with a Neta Tec 28GA boiler that’s not been the most reliable. Latest problem (if anyone can help), is heating works fine, but hot water is intermittent but rarely works now. Diverter valve cartridge replaced but still no good. Weird thing happening to the actuator though...
  5. M

    Manifold actuator caps spontaneously popped off?! Is this a problem?

    All. A couple of days ago my wife, upon hearing a whistling noise in the cupboard where the manifold is, noticed that one of the actuator caps was missing. Specifically, it was scattered throughout the cupboard (as if sprung by the...spring). Please see pictures. We have yet to re-fit the...
  6. J

    How to remove actuator from Drayton Mid Position Valve

    My Mid Position Valve has been playing up for years.. But a little tap, jet of air, or some lube seems to sort it. This year its failing more often than working, so its time to change it.. I have sourced a new value and was surprised to see that it had a black button on the side of the...
  7. barca

    Danfoss Actuator help

    Hi please could someone tell me if it’s possible I have got a danfoss HPA2 actuator which is not working so I bought a danfoss pack from Screwfix but the actuator is not the same as it’s HSA3 Are but will this still work I know HSA3 is for a 3 port Valve but I’ve only to 2 port valve Many...
  8. B

    Potterton Netaheat Boiler not switching over from CH to WH properly after replaced Valve Actuator

    My Potterton Netaheat Gas boiler in London UK only comes on to heat radiators when in timed water mode after renewing actuator valve or when both water and heating are set to On continuously it only heats water at the timed settings. Have never used a forum before to get advice. Can anyone help...
  9. P

    Only HW , no CH ,new valve and actuator fitted - Help

    Hi everybody I have got problem with my central heating. Everything was fine but couple of days ago we got only HW not CH. Couple details: Boiler Ideal Classic FF240 Programmer Drayton LP522 Thermostat Drayton RTS1 Mid position actuator Drayton MA1 One day CH didn't fired up , HW is...
  10. MrShoes

    Is it really the timer?

    Hi, I've been having heating problems recently where the heating wasn't always coming on. I have a Worcester Bosch condensing boiler which has recently been serviced, and a Lifestyle LP241 timer. The timer lets me set 2 times for each hot water and central heating. What I've found is happening...
  11. H

    Water in my Diverter Valve Actuator Motor?

    hi, I have an Ideal C30 combo boiler and recently lost all hot water, but the central heating still working. Got a plumber friend out to sort it, who changed the diverter valve actuator motor and also the BOILER DIVERTER VALVE CARTRIDGE. However, we lost hot water again the other day and after...
  12. Neil Finney

    mid point actuator does not go to H

    So, if I turn on the heating the actuator goes to W. If I turn on the heating it only goes to M. It wants to move to H but I watch and hear it stop while it is moving to H. Can someone help me as everything seems to be working? In the midpoint, the heating and water come on. Could it be...
  13. S

    3 port actuator replaced

    Hi I've just replaced my 3 port actuator. It was pretty straight forward. After I turned the power back on, it blew the 3amp fuse in the circuit board. What have I done wrong?
  14. F

    Advice on Sunvic actuator

    Hi All, I've need to change the actuator on a three port 4 wire. The actuator that is on it currently is a Sunvic SDM1901. Is there an equivalent make I could use without having to change the pipe work and follows the same wiring? Thanks
  15. C

    How to replace Mid position actuator of Drayton Mid-Postion Valve

    I think the actuator on our MA1/679 is faulty/sticking, but am not sure how to get it off to replace it. It was fitted so that it is touching one of the pressure vessels. The leaflet left by the plumber doesn't really help.( I tried to post a link to a pdf of it here, but the forum doesn't...
  16. R

    Myson Actuator Issues

    Hi, I have UFH heating downstairs installed new just over 2 yrs ago but I think one of my actuators isn't working. When the stat is turned on the red indicator doesn't lift so I'm thinking the actuator is damaged. The flow meter is working for the room when you remove the actuator but...
  17. hammers4spanner

    Faulty actuator??

    Just before i mashed my back i was asked to look at a commercial property where heating had gone down . This valve was on the flow to high level coils and was buzzing like hell , the pumps other side seem to be fluctuating .No heat seem to be transferring through to other side .
  18. M

    Swap actuator head - Wavin

    In our UFH I have noticed that 2 actuators are in the wrong position. When the stat for a room is calling for heat 2 actuators open but 1 of them is to the wrong pipe so 2 need swapped over. Would they simply screw off or clip off? Is this something I could do myself or would I need to get...
  19. S

    zone valve leak

    I have a zone valve (220V actuator) on 28mm boiler primary loop .... and a slight leak from there. It is not leaking from either of the compression joints ... so must be coming out via the central ball valve actuator. It's a Cimberio 1" valve with 28mm compression reducers, model...
  20. M

    diverter actuator not working correctly :(

    hi a week ago, we started to see problems with the central heating. When the central heating switches on, nothing happens. When the hot water is switched on, both hot water and central heating start working. I assumed it was a problem with the diverter valve (we have a Drayton MAI/679-3 mid...
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