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.

公开(公告)号：US20200063887A1

公开(公告)日：2020-02-27

申请号：US16345964

申请日：2017-10-27

Applicant: Danfoss A/S

Inventor： Niels P. Vestergaard ,  Detlef Matzen ,  Rajakumar Kanajam ,  Raghavendra Venkatesh ,  Torben Schack Fabricius

IPC: F16K31/122

Abstract: The present invention relates to a top cover (5) for soft throttling valve body (2), the top cover (5) comprising one or more fluid conduits for transferring a pilot fluid flow for setting a degree of opening of a main valve situated in a soft throttling valve body to the soft throttling valve body. Furthermore, the invention relates to a soft throttling valve (1) and a method for assembling the soft throttling valve (1). The object of the invention is to allow a good control of the pilot fluid flow while protecting the soft throttling valve body from damage due to valve failure. The object is solved by having a follower arrangement arranged to throttle the pilot fluid flow depending on the degree of opening of the main valve, further having a manual opening arrangement for manually opening the main valve and/or by further preventing a step-wise opening of the main valve in less than two opening steps. A method for assembling a soft throttling valve is also disclosed.

公开(公告)号：US11067191B2

公开(公告)日：2021-07-20

申请号：US16345964

申请日：2017-10-27

Applicant: Danfoss A/S

Inventor： Niels P. Vestergaard ,  Detlef Matzen ,  Rajakumar Kanajam ,  Raghavendra Venkatesh ,  Torben Schack Fabricius

IPC: F16K31/122 ,  F16K31/124 ,  F25B47/02 ,  F25B41/20

Abstract: The present invention relates to a top cover (5) for soft throttling valve body (2), the top cover (5) comprising one or more fluid conduits for transferring a pilot fluid flow for setting a degree of opening of a main valve situated in a soft throttling valve body to the soft throttling valve body. Furthermore, the invention relates to a soft throttling valve (1) and a method for assembling the soft throttling valve (1). The object of the invention is to allow a good control of the pilot fluid flow while protecting the soft throttling valve body from damage due to valve failure. The object is solved by having a follower arrangement arranged to throttle the pilot fluid flow depending on the degree of opening of the main valve, further having a manual opening arrangement for manually opening the main valve and/or by further preventing a step-wise opening of the main valve in less than two opening steps. A method for assembling a soft throttling valve is also disclosed.