Piston unit with rolling membrane

Details Piston unit with rolling membrane Piston unit with rolling membrane

F - Mech Eng,Light,Heat,Weapons

04

B

103/141

F04B 43/00 (2006.01)

Patent

CA 2019976

Piston units with rolling membrane are used for the handling of liquid products which require good hygiene, e.g. foodstuffs such as milk products. In a piston unit used as a pressure-compensating device pressure variations in a product line are dampened in that the side of the piston remote from the product line is subjected to a variable air pressure. Rolling membranes are positioned on both sides of the piston and enclose between them a chamber which is connected to a source of vacuum so as to secure contact of the membranes with the piston. The vacuum is distributed in the chamber with the help of a vacuum line with enlarged outlet area, and is distributed over the end faces of the piston by means of a network of ducts in the piston.

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