PRV theory

[renMIke]

Hi,

Does anyone know why you're supposed to fit PRV's on a horizontal run with the screw at the top? I'm a little short of available horizontal pipe and would like to know if it is possible to successfully fit them to vertical pipe, or failing that if I could ft one with the screw horizontally to one side.

Thanks,

Mike

 

[Bob Croft]

Boiler manufacturers fit PRV's on vertical pipes. I know of no reason why you should not fit them on vertical pipes. In essence the valve is a sealing element held against a seat with a spring. The sealing element moves once a preset pressure is reached and discharges water.

 

[justlead1]

Hi. Have not come across the the restrictions you mention, and have fitted on both horizontal and vertical. It may just be the make of valve you have acquired? The screw adjusts the pressure reduction via a spring, theres nothing inside that flops about by gravity. Good Luck

 

[Bernie2]

As far as I know it makes no difference.

 

[renMIke]

Thanks lads. That makes life a whole lot easier for me.

Mike

 

[Puddle]

As said on domestic systems ,can see no problem either way, Practice comes from industrial side were pipework is alot larger giving different pressures at different levals and flow rates affect existing pressure on vertical runs, making fitment of prv.s easier and more stable on horisontal runs

 

[Beeline]

To be fitted any which way but loose!

 

[renMIke]

Tell me now

I tried lose and got a wet wall!

Mike