Disc Check Valves are needed in steam systems where only unidirectional flow of steam or condensate is permissible. The Forbes Marshall spring loaded disc check valve is of wafer pattern check valve which can be sandwiched between flanges.

FMDCVs are compatible with both PN and ANSI flanges. They are compact in design as compared to the conventional swing and lift type of disc check valves. The spring loaded design results in a tight shutoff.