Hydraulic play leveling device, with shell sector and radial web of compression piston made as separate parts

摘要

The leveling device (1) has a compression piston (5) partly of a material of higher thermal expansion coefficient than the casing (2) round it. The piston is divided, with a radial web (7) for a no-return valve of ferrite steel and a shell sector (6) of austenite steel acting with the casing, which is of ferrite steel, to form the leakage gap.