Vibrating TRV's

[surreyblue]

Hi

I'm after some advise, I have recently had TRV fitted on all rad's except 1 in the hall where the room stat is located. As the upstairs rooms reach required temp, and the valves start to close I get a loud Vibrating / Banging sound coming from the rad / valve. If i manually close off the TRV the vibration stops. My pump is on speed 1 and the vibration can vary between 3 out of the 4 rads upstairs, never downstairs.

Any help would be much appreciated as it is starting to really P**s me off...

Many Thanks

Graham

 

[kevplumb]

sounds like they are fitted backwards

 

[PEDANTICVINDICTIVEMAN]

Cheap crap valves, bet there from a shed.

 

[oilman]

But it saves on U2 batteries

 

[ChrisR]

eh?

Try nearly-closing the lockshield valves on the offending rads. Try 1/4 turn open.

 

[surreyblue]

Excuse my lack of knowledge, but how do I check if they are fitted backwards? They seem work OK but make a bloody noise!!!
I think they are ECA? bought them from screwfix...Seems odd that downstairs have been fine but not upstairs???

Thanks for the help so far!

 

[kevplumb]

should be an arrow on the body that shows flow

 

[surreyblue]

I can see the arrows pointing into the Rad and then down the pipe. How do I check if this is correct?

thanks in advance

 

[kevplumb]

run the system from cold with offending rad turned off
let it warm up
then turn it on and feel the pipes first one to warm is the flow arrow should point that way

 

[bripl]

valve plunger is oscillating possibly round the wrong way,cheaper valves are prone to this are you sure they are multi directional