Variable Frequency Drives (VFDs) improve the efficiency of high-pressure pumps in RO systems by allowing the pump speed to be adjusted to match the actual flow requirements of the system. Without a VFD, a pump operating at a fixed speed delivers a constant flow rate, regardless of the demand. If the system requires less flow than the pump is delivering, the excess flow is typically throttled using a valve. Throttling wastes energy because the pum....
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