630.941.7600 | [email protected] | valmatic.com 71 4/24 0 0 100 200 ≥300 ≥50 40 30 20 10 STATIC HEAD (feet) PIPELINE FLOW DECELERATION (ft/sec2) RECOMMENDED VALVE SELECTION 7900B BOTTOM OIL CUSHION OR 7800LS LEVER & SPRING 7900S2 SIDE OIL CUSHION 2-STAGE 7800LW LEVER & WEIGHT OR 7800AC AIR CUSHION 7900S2 SIDE OIL CUSHION 2-STAGE OR 7900B BOTTOM OIL CUSHION W/ RELIEF VALVE OR W/ SURGE TANK 7900S3 SIDE OIL CUSHION 3-STAGE OR 7900B BOTTOM OIL CUSHION W/ SURGE TANK OR W/ PUMP CONTROL VALVE A variety of closure mechanisms allows selection of the correct Swing Check Valve for every application. This application chart illustrates the range of use for the various Swing Check configurations. Pumping systems with low static head and gradual pipeline flow deceleration may be best served by a conventional lever & weight or air cushion Swing Check. Higher static head applications benefit from a rapid spring assisted closure. When severe deceleration is present in a pumping system, oil cushioned closure provides an economical and reliable means of preventing surges associated with transients while greatly minimizing the potential for check valve slam. The adjustability of closure times on oil cushion Swing Check Valves allows operation to be tailored for each application. HEAD LOSS IN FEET OF WATER FLOW OF WATER IN GALLONS PER MINUTE CUBIC METERS PER HOUR METERS OF WATER 10 20 30 40 50 60 70 80 100 200 300 400 500 600 700 800 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 100,000 .1 .2 .3 .4 .5 .6 .7 .8 1 2 3 4 5 6 7 8 30 20 10 8 7 6 5 4 3 2 1 .8 .7 .6 .5 .4 .3 .2 3 4 5 6 7 8 10 20 30 40 50 60 70 80 100 200 300 400 500 600 700 800 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 10,000 20,000 36” 30” 24” 20” 16” 14” 12” 10” 8” 42”48” 20 FEET/SECOND VELOCITY 10 FEET/SECOND VELOCITY 15 FEET/SECOND VELOCITY 18” 6 FEET/SECOND VELOCITY 4 FEET/SECOND VELOCITY 21/2” 3” 4” 6” 2” FULL VALVE SIZING RANGE RECOMMENDED SIZE RANGE A W W A S W I N G C H E C K V A L V E Size 2 2 1/2 3 4 6 8 10 12 14 16 18 20 24 30 36 42 48 Cv 95 150 210 380 850 1,515 2,370 3,410 4,640 6,060 7,670 9,470 13,600 21,300 30,700 41,750 54,550 Flow Coefficients Swing Check Valves Swing Check Valves Application Chart Headloss Chart
