公开(公告)号：US20180128394A1

公开(公告)日：2018-05-10

申请号：US15569868

申请日：2016-03-01

Applicant: Danfoss A/S

Inventor： Aravind Vijayan ,  Raghavendra Venkatesh ,  John Arul Mike Prakash ,  Detlef Matzen

IPC: F16K31/124 ,  F16K31/42 ,  F16K31/40

CPC classification number: F16K31/1245 ,  F16K31/406 ,  F16K31/42

Abstract: The present invention relates to a top cover (3) for a soft throttling valve body (2), to a soft throttling valve (1), and to a method for throttling a main valve of a soft throttling valve (1). A follower arrangement (8) is arranged to throttle a pilot fluid flow for setting a degree of opening of the main valve in order to allow a soft throttling of the main valve, a throttling of the pilot fluid flow depending on a degree of opening of the main valve, so as to allow for a soft throttling process of the main valve. Thus, a self-controlled throttling of pilot fluid flow driving the main valve in order to establish a partial opening of the main valve becomes possible. By that, a good prevention of pressure shocks when throttling the valve is allowed and a good control for partially opening the main valve is achieved.