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Safety Check Valves A SanitaryFireHoledallHydraulicPlasticBrassTruckTankShankAirMaintenanceBoss&PipeHoseSwivelCam& Air Fittings and Accessories ValvesClampsWeldingFittings&RepairFittingsGrooveFittingsJointsFittingsFittingsFittingsFittingsFittingsFittingsFittings Safety Check Valves B (Air Fuse) C D Flow Direction Check Valve in Check Valve in Open Position Closed Position E Features: NPT and Hose Cut-off Flow Rate Part # Price/E � Does not prevent backflow I.D. Size (SCFM at 90 PSI) F � High flow valve to provide optimum performance 1/4" SCVL2 23-29 $44.52 � Controls excess air flow (SCFM) in only one direction 3/8" SCVM3 39-47 45.19 � Not for use in applications where 100% of the available SCVS3 52-65 45.19 air is required, i.e. sand blast, pile driving rigs, 1/2" SCVM4 70-78 48.53 expansion joint blow down pipes, etc. G SCVS4 80-96 48.53 � Automatically senses change in air flow and shuts off the 3/4" SCVL6 72-88 76.80 flow in the event of a surge in excess of valve flow rating SCVM6 92-108 76.80 thus preventing hose whip SCVR6 112-128 76.80 � Conforms to OSHA regulation 1926.302 (b) (7) requiring SCVJ6 132-148 76.80 H a safety device at the source of the air supply and at SCVS6 160-180 76.80 branch air lines. SCVH6 180-200 76.80 � Applications include temporary plant/factory air, 1" SCVL8 165-195 91.00 construction sites, shipyards or utilities SCVM8 220-260 91.00 I SCVS8 280-320 91.00 Construction: SCVH8 310-340 91.00 � Solid brass body and valve 1-1/4" SCVL10 260-290 179.43 � Stainless steel spring and roll pin SCVM10 300-340 179.43 � Maximum working pressure: 250 PSI SCVS10 440-500 179.43 J � Maximum temperature: 250�F SCVH10 570-630 179.43 1-1/2" SCVL12 300-360 300.96 Use: SCVM12 470-530 300.96 � Safety check valves operate by using the pressure SCVS12 640-720 300.96 differential across the valve to operate the valve and K SCVH12 750-830 300.96 spring assembly. The pressure differential is directly 2" SCVL16 510-590 410.93 related to the flow of air (SCFM) through the valve. SCVM16 725-825 410.93 � When the pressure differential is within the operating SCVS16 900-1050 410.93 limits - below the cutoff flow - of the unit, the force on the SCVH16 1100-1200 410.93 L valve exerted by the spring is greater than that caused by 3" SCVL24 1200-1400 1919.13 the pressure differential (see "Open Position" graphic SCVS24 2400-2700 1919.13 above). The valve remains open and normal operation SCVH24 2850-3050 1919.13 continues. � When the pressure differential is above the cutoff limit, the M force on the valve exerted by the pressure differential is greater than the force exerted by the spring, and the valve closes (see the "Closed Position" graphic above). � After the repair is made, normal operation is automatically N enabled when pressure across the valve equalizes through the bleeder hole. � The valve spring size can be specified by determining the air flow during normal operation and by estimating the air flow if a failure or rupture occurs. O P 106 DPL108 pages091-106.pmd 106 10/5/2007, 9:56 AM Safety Check Valves
Goodyear Rubber Products
