Check valve with valve part and control with passage through

摘要

The passage (63,65,66) through the control (82) forms a fluid connection between a connection (XI) and the valve seating. The pressure-loaded end surface of the end part (38) of the control on the valve-seating side is the same as the pressure-loaded end surface of the end part (40) of the control on the connection side. The control has a control flange (35) whose annular surface (102) is exposed to control pressure. The middle part of a valve-hole (32) is sealed against the valve hole parts (46) in which the end parts of the control are guided, by a seal (54) Each seal is supported axially on one side on an annular shoulder of a wear-resistant insert (43,44), and on the other side on a support ring (48).