Description Manuals Videos Articles Clemco Part # 22764 is the Metering Screw for the Manual Quantum Valve (MQV) knob. Manual Related Parts (1) Parts Included (1) Clemco Manual Quantum Valve, MQV #22845 $398.67 462 Customers Also Viewed Service Kit, MQV Metering Segment #22854 $25.71 Clemco Manual Quantum Valve, MQV #22845 $398.67 MQV Metering Plate & Shaft #22763 $82.45