Which manufacturer makes "full bore" radiator valves?

[LordWest]

Which manufacturer makes "full bore" radiator valves?

Thanks

 

[Last Plumber]

Danfoss make valves for gravity systems.
Saunders make diaphragm valves.
What is it for/Why do you need full bore? Is it due to flow rates? or gravity circulation pressures?

 

[LordWest]

Danfoss make valves for gravity systems.
Saunders make diaphragm valves.
What is it for/Why do you need full bore? Is it due to flow rates? or gravity circulation pressures?

My residential building has a communal heating system with about 60 radiators for 12 flats over 6 floors (including basement and 5th floor loft). It is a single pipe system (i.e. old and inefficient) and as we replace radiators and valves, I want to make sure we install "full bore" radiator valves so that flow to the radiators is as good as it can be.

 

[LordWest]

Danfoss make valves for gravity systems.
Saunders make diaphragm valves.
What is it for/Why do you need full bore? Is it due to flow rates? or gravity circulation pressures?

Thanks for suggesting Danfoss. They do make a valve specifically for single pipe systems:

Radiator Valves, RA-G, High flow, DN 15, Angle, D
013G1676

Radiator Valves, RA-G, High flow, Angle, D | Fixed capacity valves | Build on valves | Radiator Valves | Radiator Thermostats | Climate Solutions for heating | Danfoss Great Britain Product Store

store.danfoss.com

 

[Last Plumber]

Thanks for suggesting Danfoss. They do make a valve specifically for single pipe systems:

Radiator Valves, RA-G, High flow, DN 15, Angle, D
013G1676

Radiator Valves, RA-G, High flow, Angle, D | Fixed capacity valves | Build on valves | Radiator Valves | Radiator Thermostats | Climate Solutions for heating | Danfoss Great Britain Product Store

store.danfoss.com

They do and they are very good quality in my opinion.
Make sure they go on the right side. Direction of flow is important here!