NO it does not
it proves nothing take the head off.You say all the other valves are on maximum, turn then down to 2-3 and post how many start to rattle.
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here`s a good un
- Thread starter yorkyuk
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NO it does not
it proves nothing take the head off.You say all the other valves are on maximum, turn then down to 2-3 and post how many start to rattle.
The installation appears to be another bodge job.
A TRV is fitted to the radiator where the room 'stat is sited.
The system should be fitted with a bypass as required by the manual.
Fitting an auto bypass may solve the noise. What make of TRV is it?
A TRV is fitted to the radiator where the room 'stat is sited.
The system should be fitted with a bypass as required by the manual.
Fitting an auto bypass may solve the noise. What make of TRV is it?
Diyitall wrote
May I suggest you have a look at the pictures below from a well known manufacturer and familiarize yourself with them as you obviously cannot understand text.
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Only if its fitted incorrectly also.
Namsag gave the answer to this post earlier and its a pity neither you nor the OP will listen.
May I suggest you have a look at the pictures below from a well known manufacturer and familiarize yourself with them as you obviously cannot understand text.
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Only if its fitted incorrectly also.
Namsag gave the answer to this post earlier and its a pity neither you nor the OP will listen.
The OP said,
My central heating will run for approx 90 mins then the water pipes start vibrating.To stop the vibration i have to turn my thermostat valve in the bedroom 1/4 turn.
This will keep the heating quiet for up to 1hr when the same must be done.
Why would it do that if reverse flow was causing the problem.
Namsag said
Sounds like your trv is on the wrong side take the head off and if it stays quiet it needs moving to other side of rad
Same question what difference will it make if you have reverse flow.
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My central heating will run for approx 90 mins then the water pipes start vibrating.To stop the vibration i have to turn my thermostat valve in the bedroom 1/4 turn.
This will keep the heating quiet for up to 1hr when the same must be done.
Why would it do that if reverse flow was causing the problem.
Namsag said
Sounds like your trv is on the wrong side take the head off and if it stays quiet it needs moving to other side of rad
Same question what difference will it make if you have reverse flow.
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In your opinion.
So you have obviously came to the conclusion that the flow direction is correct through the trv and that its not a bi-directional valve.
And you have this notion that the trv will vibrate when the valve is correctly fitted.
Perhaps you will englighten us.
Because single-direction trv's put on the wrong end, will often only rattle at a particular flow rate, which is only establiished when other trv's in the system have moved.DIA said:
Not in my experience. Some only rattle on some settings.DIA said:
Except when it does.DIA said:
Yes it will, the valve is then fully open and they don't rattle, i.m.e. .DIA said:
In your opinion.
So you have obviously came to the conclusion that the flow direction is correct through the trv and that its not a bi-directional valve.
And you have this notion that the trv will vibrate when the valve is correctly fitted.
Perhaps you will englighten us.
I already have ballski.
Pressure differential, most valves have an 0.5bar ish maximum head, as the valve start to close the head pressure increases and the seating bounces, turning the valve to a higher setting stops the problem until the new temperature is reached, whereas it does it again.
It would take the OP seconds to check the valve arrow and, post the make/model.
Have they got an exploding cylinder in it as well.
Diyitall wrote
Thats [rubbish].
Checking the arrow proves nothing though I would suspect the flow to go through the horizontal inlet port whilst looking at the valve with the trv head being in the vertical position.
The f&r through the rad is what counts and what side the valves are fitted and its not to difficult to check that.
Thats [rubbish].
Checking the arrow proves nothing though I would suspect the flow to go through the horizontal inlet port whilst looking at the valve with the trv head being in the vertical position.
The f&r through the rad is what counts and what side the valves are fitted and its not to difficult to check that.
Diyitall wrote
Thats [rubbish].
Ask the manufacturers
Checking the arrow proves nothing though I would suspect the flow to go through the horizontal inlet port whilst looking at the valve with the trv head being in the vertical position.
The f&r through the rad is what counts and what side the valves are fitted and its not to difficult to check that.
Not all valves are in the horizontal position, the arrow shows the intended flow, a hand on the pipe to see which end gets hot first would confirm the flow end.
N
namsag
Doitall how is taking the head off going to prove your theory all that is doing is leaving the valve wide open ,the valve is not going to be noisy ever in this situation .It gets noisy beause the head has reahed temp and is trying to close the valve and because of how the valve body internals are made for water to pass a certain way it is trying to stay open so in effect the valve eating starts to chatter
Your not listening namsag.
As the valves start to close the system head/pressure raises above the manufacturers maximum pressure differetial design limits 0.5bar in most cases
Opening the valve to a higher setting prolongs the shutting process until the higher temperature is reached. Which if you read the OP's post is what is happening.
The other valves are all turned on full and probably never get to shutting down, to answer your earlier question.[/b]
page 2 gives you the technical stuff.
http://content.honeywell.com/uk/homes/Catalogue/Non Electric/5.14 VT117E.pdf
N
namsag
Sorry just can`t see it every other valve has never shut off very very unlikely . Will wait and see the final outcome
Egg on face comes to mind
Ask any manufacturer.
In the meantime another bit of reading for you.
http://heating.danfoss.com/PCMPDF/VDSXE102_RA-UN+RA-UR.pdf
and another, note the maximum pressure differential
Why would all valve manufacturers recommend this and suggest an ABV is fitted to avoid any problem, even on bi-directional valves.
http://heating.danfoss.com/Product/013G0013_MNU17378936.html
Why would all valve manufacturers recommend this and suggest an ABV is fitted to avoid any problem, even on bi-directional valves.
http://heating.danfoss.com/Product/013G0013_MNU17378936.html
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