SELF-CLEANING, AUXILIARY-CONTROLLED MAIN VALVE WITH MECHANICAL OPERATING MECHANISM, PARTICULARLY FOR HIGH-PERFORMANCE PIPE NETWORKS

摘要

Auxiliary valve controlled self-cleaning main valve with mechanical operating means. The valve body (1) of the main valve has an inlet (2) and an outlet (3) interconnected through a flow-through opening, and a movable piston (6) having a main closing element (8) at one of its sides and a brake O-ring (9) at its other side. In the control chamber (5) an auxiliary valve (4) with a control valve stem (7) is provided. Between the piston (6) and the auxiliary valve (4) a compressible spring (12) is positioned. The mechanical operating means is provided with a wedge travel path and adapted to press the control valve stem (7) when force is applied externally and to keep it pressed in without applying external force, further it is adapted to release it when force is applied externally and to keep it released without applying external force.