b'SW-NCA & NCB SERIESS W- N C A & N C B S E R I E SOPEN SW-NCASeries CLOSED SW-NCBSeriesSwing-Check StandardDualDiscCheckValveVr Reverse VelocitySupercheckDualDiscCheckValveNozzleCheckA/A1 A/A1 dr/dt Deceleration3Single Spring Loaded Nozzle Check Valve SW-NCA SeriesFaceTo Upto250NB(10)and150~300LBSsinglespringFace4 5 loadeddesign(ModelNumber:SW-NCA)minimumpressurelosswithexcellentdynamicperformance.Multi Spring Loaded Nozzle Check Valve SW-NCB Series2FaceToFace250NB(10)andabove150~2500LBSmultispringloadeddesign(ModelNumber:SW-NCB)minimum pressurelosswithexcellentdynamicperformance.16 4ExampleOnly.Refertoasbuiltdrawings.(FL-NCFOSeries)alsorefertodrawingsasalldimensionsaredifferent.46 SUPERCHECK - Check Valves - Wafer Style'