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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. N

    ufh actuator stuck closed?

    Hope someone can help me with a problem one wwith one of the 2 zones on my ufh system.one(downstairs)works fine,the other(upstairs bedroom)fails to heat up. I've had room thermostat checked and its fine.thought it could be actuator stuck closed.i took top off but pin appears to be up-does that...
  2. MZR

    Nightmare !!! Help

    hi all vaillant ecotec pro 28 combi first job no hot water not firing = flow sensor changed hot water yay ! but looked like there was a leak that had caused that problem i investigated that and could find anything. recalled next afternoon due to a leak , located leak on divertor valve spindle...
  3. M

    New actuator on old wiring box

    I am replacing an old actuator sunvial dm5601 by a danfoss hsa3 and new 3 way valve. I have a sunvial wiring box and I want to know what changes I have to made because the new actuator doesn't work properly. The system is old and Y system. When HW calls is fine, CH call opens both ways, HW+CH...
  4. MarkAqua

    ACTUATOR/ motorised valve problem ******

    Hey just a quick questions, Got a call off a customer today and having trouble with her hot water and heating. What is happening is, when she turns her heating on the hot water just keeps getting hotter and hotter. They're is a motorised valve fitted and a cylinder stat both are 3 years old...
  5. P

    Underfloor heating manifold actuator

    Hi , just started in a new job with undefloor heating , although it is a really good job they seem to be having a lot of problems with the actuators popping off . Am i right to think that the manifold should be normally closed when the actuator isnt fitted and when the room calls for heat the...
    • papahape
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    • actuator heating manifold ufh under floor heating underfloor underfloor heating
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  6. M

    Can I remove the actuator head to test

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  7. S

    CH rads hot when they shouldn't be

    Hello, I am trying to diagnose the cause of a weird issue. CH system in 5 year old house, main symptoms high heatng bills and radiators on "all the time" most controls are drayton TA5 rads, LPSi241 prog timeswitch, ZA05 motorised actuator on the CH side not sure what the model of the HW...
    • Sah911
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    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  8. M

    vaillant ecotec pro 28R1 hot water ok but no heating.....

    getting central heating demand...boiler fires...goes upto 81 degrees then shuts off as the water is going no where.....is this the diverter? ....just wanted to check i have diagnosed correctly before ordering the part. thanks lads.
  9. F

    cylinder thermostat

    Got a prob with a sunvic unishare actuator not operating [opening] for c/h can this be why c/h is being shut down as soon as h/w is satisfied by cyl stat.
  10. D

    Bosh 37CDi model, Danfoss TP5000SI-RF + RX1, actuator & EUHWT wiring

    <span class="postbody">Hi All, <br> Bosh 37CDi model, Danfoss TP5000SI-RF + RX1, actuator & EUHWT wiring <br> I have a Worcester 37CDi model, Danfoss TP5000SI-RF + <span style="font-weight: bold">RX1</span> thermostat, Grundfos pump (230V)</span><span class="postbody"> +...
  11. T

    Motorised valve - How can I control it manually?

    I have a three way motorised valve minus the motor and actuator). I'd be very grateful if anyone can tell me the positions of the control to turn off rads or hot water - or both. It's a Worcester 420302 PMV3 (replacement MPE322)
  12. S

    Boilermate 3 (changed mid position valve radiators still getting hot?)

    Hi Got called out to my first Boilermate 3 today. Customer complained of hot rads with no call for central heating. Was just gonna change actuator but Valve was really stiff so drained down changed actuator and brassware. Still rads getting some heat in them. Valve is working correctly. Any...
  13. S

    Actuator Valve nightmare!

    Hi I have an old system where I have 2 x 2 port actuator valves honeywell, pump and baxi boiler. My HW valve head packed in a year ago so I just switched it off and jammed it open and it seems to heat the hot water cylnder when the heating kicks in (fine by me). The CH valve packed in the...
  14. D

    Drayton MA1 3 port Motorised valve question

    Hi, I beleive I have a faulty Drayton MA1 3 port motorised valve. I intend to replace just the actuator, but would appreciate if someone could shed any light on the following. If I take the actuator off, and move the spindle with my fingers, it only moves 45 degrees from one side to the other...
    • donkeeboy
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    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  15. R

    Y Plan Honeywell Smartfit

    Hi, Looking for advice I've got a honeywell smartfit the controller is showing Fault 04. But I've got no paperwork to refer to, The actuator operates fine when its removed from the valve but when on the valve it seems that is being forced up. The switch in wiring centre is correctly switched to...
  16. E

    zone valve actuator motor

    anyone know of any instructions on how to change a motor? tried it a couple of times but failed. any suggestions would be appreciated!
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    • Forum: Plumbing Zone
  17. R

    Actuator problem which replacement?

    Hi there, I have a problem with the actuator on a 3 port motorised valve in our system. 2 years ago a plumber installed a Salus MV322 - 3 Port Motorised Valve in 22mm. 1 year on when the system clicked from hot water to heating, it made an awful noise. Clunk! even waking the kids when it...
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    • Forum: Plumbing Jobs | The Job-board
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