One thing I would add is I am against any valves on the return lines unless they are only for isolating for maintenance. throttling a return is just asking for trouble at some point. if you want to varry the flow between the sump and the fuge use line size to do it. if you want to varry flow through the system then throttle the pressure side of the pump.
Steve
See no problem valving the return on a Herbie (only) if the emergency drain is sufficently sized.
11-19-2009, 02:41 PM
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