TVR valves

[man100]

I have always been given to understand that at least one radiator in a system should not have a tvr fitted so as to avoid the pump and boiler running when all radiators were closed off.

However I was on a site of a tvr maker and they stated that all radiators could and should have them fitted.

Which is correct ?

 

[PrenticeBoyofDerry]

One rad should not.

 

[Madrab]

They may be saying that on the proviso that the CH system has an auto-bypass built into the design. A lot of systems won't have an auto-bypass therefore one radiator is left without a TRV to allow the boiler/pump to overrun without damage.
Oh and it's TRV BTW unless it sounds great and does 160mph

 

[D_Hailsham]

However I was on a site of a tvr maker and they stated that all radiators could and should have them fitted.

Do you mean actually visiting their premises or just on their website?

If the latter, can you provide the link?

 

[Charnwood]

Spot the difference.

 

[hazetimesfive]

a non thermostatic fitted radiator is no longer suitable as a system bypass.

 

[Madrab]

I'll have the red one please

 

[Charnwood]

I'll have the red one please

On the flow or return? It is bi-directional, but flows faster in one direction than the other.

 

[Madrab]

how about 1 on each, both pointing in the direction of the flow, might get a bit of velocity noise though