Facts & Figures Book - KPI-JCI

Sand discharge is controlled via a controller (see section onSpec-Select Classifying Tank Controllers) which receivesa signal from an adjustable height sensing paddle locatedat each station. The sensing paddle controls the amountof material that accumulates at each station before a valveopens to discharge the sand and water slurry. The valvesconsist of self-aligning urethane dart valves and urethaneseats, providing uniform flow at the maximum rate, positivesealing and long service life. The urethane dart valveis connected to an adjustable down rod to ensure optimumseating pressure and provide leak resistant operation. Thevalves are activated by an electric/ hydraulic mechanism inresponse to signals received from the controller and sensingpaddle. Once discharged, the slurry flows through productdown pipes, which include urethane elbows for improvedflow and wear into a collecting/blending flume for transportto the appropriate dewatering screw.The electric/hydraulic mechanism is mounted within abridge that runs lengthwise with the tank. This systemincludes an electric/hydraulicpump, reservoir, accumulator,individual ball, and check valvesat each station. Also included is atoggle switch box, with a 3-positionswitch for each valve at a stationACBwhich can be “plugged in” to anindividual station, providing maximumflexibility in troubleshootingand servicing the classifying tank.Other important features of theclassifying tank include stainlesssteel hydraulic tubing withO-ring face seal fittings, optionalrising current cells to createhindered settling, optional recirculatingpump to reduce overallwater requirements and completepre-wiring of the tank to a NEMA 4 junction box/controlenclosure located on the bridge.Washin g/Classifyin g121