Lead/Lag Pumps
Lead/Lag Pumps
(OP)
Hi,
Can somebody explain what the lead/lag control means in pumps?(foe a novice)
How about HOA?
thanks
Can somebody explain what the lead/lag control means in pumps?(foe a novice)
How about HOA?
thanks





RE: Lead/Lag Pumps
Hand is when you control it with pushbuttons usually near the pump.
Off is a controlled state so that the pump will not start (not to be used for working on the pump, then you need to lock it out!)
Auto is when the starting and stopping of said pump is controlled by a computer, PLC, remote operating system.
RE: Lead/Lag Pumps
However, when pumping abrasive materials in facilities with high cpacity factors such as coal fired powerplants, the alternator is sometimes diasbled on pumps in ash water service. The theory is when the "lead" pump wears out the plant can continue to operate with the "lag" pump with minimal wear while the worn out pump is repaired or replaced. This requires plant personnel, both ops & maintenace, to monitor the performance of the "lead" pump and pull it when worn excessively.
RE: Lead/Lag Pumps
RE: Lead/Lag Pumps
Hand generally means that the pump is going to run. Auto could start or stop via a simple level or pressure switch instead of DCS or PLC output.
John