Description Manuals Videos Articles Popular Accessories 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 $493.29 462 Customers Also Viewed Clemco Apollo 20 HP DLX Supplied-Air Respirat… $530.58 - $618.37 Retaining screw #03131 $4.00 Clemco SG-300 Portable Suction Blast Gun with… #02641 $775.17