公开(公告)号：US11746923B2

公开(公告)日：2023-09-05

申请号：US17609692

申请日：2020-05-05

Applicant: DELAVAL HOLDING AB

Inventor： Souren Kerikorian ,  Krister Lindström ,  Peter Rehnström

IPC: F16K11/044 ,  F16K31/40 ,  A01J5/04 ,  F16K31/06

CPC classification number: F16K31/402 ,  A01J5/048 ,  F16K11/044 ,  F16K31/0606 ,  F16K31/0627

Abstract: A control valve and a membrane for a moving a valve disk of a control valve between a first position and a second position are provided. The membrane has a central axis perpendicular to an extension plane of the membrane. The membrane includes an outer annular rim portion, a central portion configured to be connected the valve disk, and a flexible portion that is annular and provided between the central portion and the outer annular rim portion. The membrane is flexible to permit the central portion to move back and forth along the central axis, thereby permitting the valve disk to move to one of the first position and the second position. The membrane is designed with an inherent pre-tensioning of the flexible portion, which permits the membrane to exert a force on the valve disk from the first position towards the second position.