... ( in Vertical or in Horizontal ) DIN, ANSI, JIS, BS Standard DN20-DN150 ( 3/4"- 6" ) . Working Pressure PN10 Feature:Inclined Seal ... Pressure ShiftNo Internal Exposed Metal Parts, No Springs, Not Easy to Be Blocked, Complete Anti-CorrosionLow Open Pressure (<0.01kg/cm2 ... ).Increased Wall Thickness, and Are Support to 1.5 Times the Back-Pressure PNConnection with Stainless Steel ...