Swing check valve in ductile iron with a flanged connection, intended for use on water, waste water and media with sludge content. The body has a tilted seat for best tightness at low differential pressures. The valve is equipped with a lifting device which makes it possible to drain the pressure side before service. The flap is reversible and comes with NBR or EPDM rubber (KTW, W270, WRAS). The swing check valve has a low pressure drop and therefore low energy losses. Face-to-face length acc. to EN 558-1 basic series 48. Manufactured and tested acc. to EN 1074-3 and resilient seated acc. to EN 12334.