Auto Recirculation Valves
Auto Recirculation Valves
(OP)
Dear All,
Has anyone used auto-recirculation valves in their pumping systems (see Tyco website: www.tycovalves-na.com/ getlit.asp?lit=ld/YAWMC-0418-US.pdf ). In our plant we use continuous minimum flow for small capacity pumps; for high capcaity pumps, we have a flow control valve to take care of the min. flow. However, in such large pumps ; we also have a min flow line (with a flow restriction orifice) for the startup / pump switching case.
The above was just for your information. My main question is that I want to have feedback from members about their experience with the Auto Circulation valves and the problems they faced (if any).
Best Regards
Has anyone used auto-recirculation valves in their pumping systems (see Tyco website: www.tycovalves-na.com/ getlit.asp?lit=ld/YAWMC-0418-US.pdf ). In our plant we use continuous minimum flow for small capacity pumps; for high capcaity pumps, we have a flow control valve to take care of the min. flow. However, in such large pumps ; we also have a min flow line (with a flow restriction orifice) for the startup / pump switching case.
The above was just for your information. My main question is that I want to have feedback from members about their experience with the Auto Circulation valves and the problems they faced (if any).
Best Regards





RE: Auto Recirculation Valves
Major complaints were. 1) When they failed they took the whole system down. 2) You cannot tell how much flow is going through them or where it is going at any given time. Even with three gauges (one before the valve one after the valve and one on the recirculation line) It can be confusing on how much flow is going to the different areas and they must have faith that the valve working correctly. 3) The savings in energy was not enough to pay for the valve and maintaining it.
Regards checman
RE: Auto Recirculation Valves
it pays to remember that a pump that is not required can be turned off. While this is not always the case with large pumps, it often is with small ones.
Cheers
Steve