... /4"- 6" ) Working Pressure: 10kg/cm2 150 psi PVC Swing Check Valve ( in Vertical or in Horizontal ) DIN, ANSI, JIS, BS Standard ... Flap, Can be Dual-Use in Vertical / HorizontalFull-Flow, Low Resistance. Small Opening Pressure ShiftNo Internal Exposed Metal Parts, No Springs ... ( 3/4" ) - DN150 ( 6" ) EPDM Rubber. BSPT or NPT2. PVC Check Valve with Flange DIN, ANSI, JIS, BS Standard DN20 ( 2" ) - DN150 ...