Description Manuals Videos Articles Clemco Part # 02440 - Inspect Plate for Clemco Flat Sand Valve (FSV) and Sentinel Valve. FSV Item # 18 Sentinel Valve Item # 15 Manual Related Parts (2) Parts Included (2) Clemco Flat Sand Valve, FSV #02427 $281.18 159 Clemco Sentinel Metering Valve for fine grit … #21439 $916.11 465 Customers Also Viewed Clemco Flat Sand Valve, FSV #02427 $281.18 O-Ring, 1-3/4 inch OD #01990 $5.74 Gauge Unit for FSV & Sentinel Valves #02433 $30.78