Description Manuals Videos Articles #20494 Clemco Sentinel Valve Piston Shut-off. Related Parts (5) Parts Included (5) Clemco Millennium Valve Piston #22613 $44.40 282 Clemco Sentinel Valve (with ACS) #20508 $916.11 463 Sentinel Piston Cup #20515 $42.39 526 Spring, Sentinel and Auto Quantum Valve #20600 $59.44 527 Valve, Upper Body, Sentinel #20514 $335.44 528 Customers Also Viewed Clemco Sentinel Metering Valve for fine grit … #21439 $916.11 Sentinel Piston Cup #20515 $42.39 Sentinel Seal Kit, Upper Segment #22388 $65.28