This Corken multi-stage side channel pump (same a Sero) is pumping NH3 for a refrigeration loop. The lesson here, is how quiet the pump is when installed correctly, and operating full of liquid. The noise you hear is the two Chempumps that are installed to the left of this pump, wrapped in insulation. We rebuilt this pump for customer after a "pump house" rebuilt it incorrectly. This video is after our repair.
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