Med Full Lug Dual Plate Check Valves designed and manufactured strictly to International Standards API 6D, API 594, ASME B16.34 or Equivalent Standards Compliance and Design Features: » Design & Manufactured to API 6D, API 594, ASME B16.34 or Equivalent » P.T Ratings to ASME B16.34 » Face to Face Dimensions to ASME B16.10 » Flanged Ends to ASME B16.5 » Butt-weld Ends to ASME B16.25 » Valves Marking to MSS SP-25 » Inspect & Tested to API 598 » Size Ranges from 2 ”thru 60” » Structured in One Piece Union Body » Pressure Ratings from Class 150 to Class 2500, PN16 to PN420 » Ends Connections in Flanged R.F or RTJ, Wafer, Fully Lugged and Grooved » A variety of body and trim material is offered, including carbon steel ASTM A216 WCB, WCC, Low Carbon Steel LCB, LCC, Alloy Steel WC6, WC9, C5, Stainless Steel CF8, CF8M, CF3, CF3M, Duplex & Super Duplex Steel A890 GR.4A,5Aor F51, Special Materials in Monel, Alu. Bronze C95800, 95600 etc. Coatings may be provided for added corrosion or wear resistance. Hard-facing and weld overlays may also be supplied. Seats Options with metal-to-metal or bubble-tight resilient.