Ball Check Valve Fig. No. CV48S Size: DN25-DN80 for Threaded End,DN40-DN600 for Flanged End Design Standard: EN12050-4 Face to Face: EN558 Series48 Threaded according to ISO228-1,BSPP Flange drilling according to EN1092-2 PN10,PN16, ISO 7005-2 PN10,PN16 Working Pressure: PN10.PN16 Hydralic Test according to EN12266-1, ISO5208 Material conform to EN-GJS500-7. Counterweight Control Lever for selection. Suitable for both horizontal and vertical installation