Lift valve with raisable and lowerable spindle - has O-ring seal for inner space of upper housing section against throughflow duct in lower housing section

摘要

A closable throughflow duct coacts with a housing part (1a,1b) with an unmachined valve seat (2) in its lower section (1a),while in the upper housing section(1b) is a raisable and lowerable spindle (4), which carries a plug (5) at its end extending into the throughflow duct and working with the valve seat (2). The spindle with its upper end is in engagement with radial clearance with a spindle nut (9) arranged in the outer end of the upper housing section. The inner space of the upper housing section is sealed by a sealing device (7,6a,6b) against the throughflow duct,through which medium flows. Between the element (7) which has a tipping movement and the spindle is arranged a further part (6b) of the sealing arrangement (7,6a,6b). ADVANTAGE - Simple mfr.and assembly.