Damping device for quick closing fittings - has damping piston with longitudinal bore connected by cross bores to sealing pack

摘要

The damping device for a quick closing fitting has a drive piston connected to a spindle and provided with a recess which is associated with a damping piston fixed on the cylinder base. The damping piston has a longitudinal bore (18) with throttle and this bore is connected by cross bores (25) with the ring grooves (23) of the guide rings (21) of the sealing pack (20). These ring grooves touch several slits (24) provided at the ends of the guide rings (21). The sum of the cross sectional faces of all the transverse bores (25) including the cross sectional face of the throttle is less than the cross sectional face of the longitudinal bore (18). ADVANTAGE - Relatively quick closing times.