HYDRAULIC DAMPER FOR PIPELINE SYSTEMS AND THE LIKE

摘要

The hydraulic shock absorber for piping systems has a piston and a cylinder, and also a storage space for the hydraulic liquid contained in the cylinder spaces present on either side of the piston. Disposed in the piston is a main control valve having a valve seating body in which two oppositely situated, piston-like valve parts having at least one through hole are displaceably mounted and are under spring force. At least one of the circumferential surfaces (31, 36) and one of the circumferential surfaces of the hole which receives the valve seating body are provided with circumferential grooves (33). The groove expediently extends helically. Radial slots (34, 35) are provided at the end faces of the valve body (17). ……