Description Manuals Videos Articles Popular Accessories Clemco Part # 20498 - Metering Handle for Clemco Flat Sand Valve (FSV) and Sentinel Valve. FSV Item # 6 Sentinel Valve Item 19 Manual Related Parts (2) Parts Included (2) Clemco Flat Sand Valve, FSV #02427 $315.46 159 Clemco Sentinel Metering Valve for fine grit … #21439 $1,010.07 465 Customers Also Viewed Clemco 1 inch Abrasive trap, Complete #02011 $163.70 Clemco Flat Sand Valve, FSV #02427 $315.46 Pulsar Plus VI-S Suction Cabinet #29383 $20,358.00