... Working Pressure: 10kg/cm2 150 psi PVC Swing Check Valve ( in Vertical or in Horizontal ) DIN, ANSI, ... -Flow, Low Resistance. Small Opening Pressure ShiftNo Internal Exposed Metal Parts, No Springs, Not Easy ... Arrow Mark on the Top Side 1. PVC Check Valve DIN, ANSI, JIS, BS Standard DN20 ( 3/4 ... DN150 ( 6" ) EPDM Rubber. BSPT or NPT2. PVC Check Valve with Flange DIN, ANSI, JIS, BS Standard DN20 ( 2" ...