Control valve for regulating pressure medium flow in door closer, includes resilient-material-made collar set around support end of control piece, to form supporting surface that can be placed against door closer body

摘要

The valve (510) has a control piece (51) with a beveled end (52) and a support end (53). A resilient-material-made collar (54) is set around the support end, to form a supporting surface that can be placed against the door closer body, such that the control piece and the collar fixes the control valve to the door closer body.