Foot valve
Foot valve
(OP)
Hi guys,
I would like to calculate the loss of head in a 20" foot valve for a velocity of the fluid (water) about 1.2 m/s.
The most important factor are the losses in the screen retainer (i suposse), so should be interesting to know any kind of chart for calculate the losses depending the shape, diameter and the number of the circles of the string.
Thanks in advance.
I would like to calculate the loss of head in a 20" foot valve for a velocity of the fluid (water) about 1.2 m/s.
The most important factor are the losses in the screen retainer (i suposse), so should be interesting to know any kind of chart for calculate the losses depending the shape, diameter and the number of the circles of the string.
Thanks in advance.





RE: Foot valve
RE: Foot valve
as far as I know, the screen retainers are designed to have an open flow area similar to the nominal diameter of the pipe, so their pressure loss is no the most significant item.
The valve itself creates higher pressure losses.
If you install a nozzle check valve, the prssure loss may be as low as 5.5 mbar at 1.2 m/s.
They are non-slamming without dampening and available at www.noreva.de or hgustorf@noreva.de
RE: Foot valve
I would hope the manufacturer will have the emperical data you need. Just make sure they give you the data for your entire valve system, inclusive of the screen. A lot of times the first level sales reps don't have this info and you need to dig back to corporate engineering. Don't give up until you get the info you need!!!!
BobPE