Primary Circuit Backflow in Solid Fuel / Oil Fired system

[dontknowitall]

I suppose you could put a normally open 2 port valve on the return operated by a stat on the flow so if no heat in solid fuel boiler valve shut and in a power cut valve returns to open. Please check regulations as to wether this is allowed

I don't know much about solid fuel (learning) but I think this one is allowed. I was scratching my head earlier as I have been shown how this was done to keep within regulations, safety, etc. The trick is the "normally open" 2 port valve - I think!

 

[Solid Fuel]

Ever fitted a flap non return valve in circuit and no adverse affect to flow.

 

[SimonG]

Should have 2, one to heat leak that fails open and one to cylinder that fails closed to protect cylinder in case of power failure.

 

[ecowarm]

I don't know much about solid fuel (learning) but I think this one is allowed. I was scratching my head earlier as I have been shown how this was done to keep within regulations, safety, etc. The trick is the "normally open" 2 port valve - I think!

Thats correct DKIA in green

 

[Solid Fuel]

Ever fitted a flap non return valve as suggested in primary circuit.

 

[Best]

Seen it done, & it works, providing it's fitted right, but can't see it being allowed.

 

[Gray0689]

Works perfectly and it is allowed

 

[Best]

Works perfectly and it is allowed

I wasn't sure if it was allowed or not, as some info says no valves on primaries, but I suppose this is to stop gate valves etc being fitted by idiots. I just don't like to tell anyone to mess about with the primary circuit if they are not experienced. I have no problem with a flap valve fitted on return, between cylinder, personally, & to be honest, have fitted them.

 

[Gray0689]

No valves allowed that can be shut off like you said gate valves ect

 

[Best]

Thanks Gray, I will feel happier fitting them in future, - if I can buy flap valves easily anymore, as merchants seem not to have them!