By-pass balancing valve

[JAllen]

The diagram below shows my current boiler set up. Could someone tell me what is the purpose of the by-pass balancing valve as shown on the diagram. Should this gate valve be left open or closed, or somewhere in between? Thanks.

By-pass balacing valve

• JAllen
• 30 Nov 2008
• 1

 

[MANDATE]

It provides a way out should there be any pressure build up. It does not do anything if its closed. Having said that I believe if you have 3 port valve its not needed cause one of HW or CH ports is always open.
If you have it fully open you will find water will take the easy route and will go back to boiler rather than go through your radiators.
We had 1 radiator that would not get hot, well not until I found the by pass valve fully open. I now have it about 1/4 open.

 

[Softus]

It provides a way out should there be any pressure build up.

Wrong.

if you have 3 port valve its not needed cause one of HW or CH ports is always open.

Right.

If you have it fully open you will find water will take the easy route and will go back to boiler rather than go through your radiators.

Also right.

 

[scatmanjohn]

Softus wrote:

Right

Wrong.

 

[MANDATE]

Come on then softus! It's no good saying I'm wrong if your'e not going to expand on it . How will I get it right next time?

 

[seco services]

if you have 3 port valve its not needed cause one of HW or CH ports is always open.
Right.

what if it has trv's fitted ?

 

[scatmanjohn]

what if it has trv's fitted ?

They never thought of that did they

For Softus: http://www.bssuk.co.uk/bsscomm/assets/gfx/links/SundialYPlan.pdf

 

[Softus]

Come on then softus! It's no good saying I'm wrong if your'e not going to expand on it . How will I get it right next time?

Here's a clue:-

If the pressure builds up, then how will an open bypass valve relieve that pressure?
____________________

Softus wrote:

Right

Wrong.

Wrong.
____________________

Skidderly-bidderly-pupperly-wiggerly
____________________

what if it has trv's fitted ?

If the system has been badly installed, e.g. with TRVs on all rads, then all bets are off.

 

[scatmanjohn]

softus wrote:

Wrong.

Honeywell wrote:

Bypass – An automatic bypass valve
should be fitted to prevent any
increase in pressure within the system.
Even though there is always one valve
outlet open: the bypass will guard
against the possibility of the heating
circuit being isolated by the radiator
thermostats or manual operation of the
radiator hand wheel valves.

Hmmmm

 

[Softus]

Bypass – An automatic bypass valve
should be fitted to prevent any
increase in pressure within the system.

Would you like to interpret that nonsense statement?

Even though there is always one valve
outlet open: the bypass will guard
against the possibility of the heating
circuit being isolated by the radiator
thermostats or manual operation of the
radiator hand wheel valves.

And that one?

Or do you just prefer to unintelligently quote things, as if the words carry some special weight just by virtue of being published on a company web site?

 

[scatmanjohn]

Would you like to interpret that nonsense statement?

Sorry i only speak English and as that statement is already in said language i am struggling a bit.

If you want to make up your own methods, hey fill ya boots.

 

[Softus]

Ski-Ba-Bop-Ba-Da-Bop

Sorry i only speak English.

Hm.

 

[scatmanjohn]

 

[crockett]

I think the OP has his answer, you two go and spar somewhere else

 

[wiggikins]

Worralorrrabollluks