check valves are bolted cover, renewable seat ring, and body mounted disc swing type. Swing Check valves are normally designed for horizontal installations. It can be installed in vertical direction with flow in upward under the disc. There is no tendency for seat to disc because the disc meets flat surface without rubbing upon contact.
Flow directions are marked as cast on the body for ease of installation. Swing Check valves are adequate for all service media.
BS 1868 / API 6D
BS EN 12266-1
FACE TO FACE
ASME B 16.10
Flanged End – ASME B 16.5 Butt Weld End – ASME B 16.25