Throttle valves for raw water
Throttle valves for raw water
(OP)
Hey guys,
Looking for a thread (or any reference really) which discusses different options for flow control valves; particularly those which are well suited for turbid water and can easily be throttled.
Thank you in advance for your recommendations.
Looking for a thread (or any reference really) which discusses different options for flow control valves; particularly those which are well suited for turbid water and can easily be throttled.
Thank you in advance for your recommendations.





RE: Throttle valves for raw water
Valves
RE: Throttle valves for raw water
also the control range, pressure, velocity, valve CV required have a big impact on what is and isn't possible.
Control valves are designed to be throttled so I'm not sure what you mean by "easily throttled"
Once you have fluid with dirt or particles, your choices of control valve start to reduce. You then either need very hard seals or disc edges in something like a butterfly valve, or you need slurry pinch valves like this http://www.flowrox.com/Products/3_1_pinch_valves
In general most types of valve designed for isolation (gate, ball, plug and butterfly to a certain extent, are not good at control and either have a poor control range or suffer wear very rapidly when trying to control with any substantial pressure drop.
Standard globe valves need very hard seats and discs to cope with dirt.
You would be advised to search and look up what they do for slurry as this is probably closer to your requirements.
Try and find a way to not need control valves - use of multiple pumps or VFDs or batch pumping - all much better in the long run.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Throttle valves for raw water
More details: Max velocity of 1.5 ft/s, max pressure 20 psi, max of 185 ntu, average pH 8.5.
VFD was ruled out by the powers that be. Looks like I'll need a robust butterfly valve of the sort.
RE: Throttle valves for raw water
http://www.globalspec.com/learnmore/flow_control_f...
RE: Throttle valves for raw water
I have no idea what 185 ntu means in practice wrt particles, but sure looks pretty murky...
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Throttle valves for raw water