Any further inquiries please contact with me Valve Type CI / CS / SS WAFER CHECK VALVE Design Std API 598 / API 6D Size Range 25 DN to 600 DN [1 to 24] Body [SS - AISI 304 / 316] [CI- IS 210 Gr. FG 200 / ASTM A 126 Gr. B] [CS - ASTM A 216 Gr. WCB] Disc AISI 410 / 304 / 316 Seat NITRIL / EPDM / NEOPRENE / PTFE / SILICON Design Features Single Plate, Swing type, Self acting , Wafer type, Face Sealing - O ring, Horizontal / Vertical Mounting Pr.Rating [PN 10 / PN 16] [ASME - Class 150 / 300 / 600] Face to Face API 6D End Connection Sand witched Between Flanges: [BS 10 Table D / E ] [ DIN 2542 - PN 10 / DIN 2543 - PN 16] [ ASME B16.5, - CLASS 150 / 300 / 600 ] Testing Std. API 598 Optional Spring Loaded , Small / Large Groove faci