Flow passes through the Centra-flo™ Filter by gravity. Using a pneumatic-float displacer type level sensor, a constant water level is maintained in the filter. An automatic effluent control valve with a pneumatic positioner regulates the degree of opening in response to a 3 to 15 psi signal from the level sensor. A change in the signal will result in a corresponding change in the degree of valve opening or closing.

UP FLOW FILTER P&ID

DOWN FLOW FILTER P&ID

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Flow control system will be self-contained and may require manual adjustments to fine tune the system.

Each filter will be furnished with an operator’s control station equipped with a manual shut off valve, air regulator, air filters, rotameter(s), pressure gauges, and all other controls necessary for operation of the filter’s airlift.