Grundfos scala 2 forum2/28/2024 ![]() ![]() However, to go back on topic, The booseter pump that I suggested earlier is exactly the item to boost pressure as needed from the community system pressure to the desired pressure. Selecting a pump to run against a constant pressure to an open tank instead of a pressure tank may allow it to be more efficient. That's where running a well pump against a pressure tank can be inefficient at some point in the pressure cycle the pump may be quite inefficient. Most pumps are efficient at only one particular flow rate and pressure. There are huge differences in efficiencies in pumps. Their only efficiencies come from being able to more efficientlyl run the pump, so that the PUMP is more efficient. ![]() VFD controlled motors are actually LESS efficient than standard motors. The only thing I know which can increase power efficiency for any given well pump motor is correcting the power factor, either by get a high efficiency motor or by using power factor correcting devices or capacitors. As it stands there are no devices in this universe which can get around that, perhaps in another universe perpetual motion has been achieved, but not his one. The amount of power used to deliver a given number of gallons from a well is a constant, a VFD can not change that. VFDs do little or anything for water pumps about the only power saved is during the inrush current during starts. Multi stage pumps have multiple impellers, each boosting the pressure, worked with some which have 16 stages. You need a booster pump as mentioned or a multi stage pump. ![]() JRC3 is correct, the tank is there to stop short cycling, by no means does it increase or decrease pressure supplied by your pump I was in water well drilling for years. ![]()
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