公开(公告)号：CA2955431C

公开(公告)日：2019-04-30

申请号：CA2955431

申请日：2010-08-30

Applicant: EMERSON PROCESS MANAGEMENT VALVE AUTOMATION INC

Inventor： TER HORST GERARD ,  VAN DORP ERWIN

IPC: F16K31/163 ,  F15B15/22 ,  F16F9/48

Abstract: Rotary valve actuators having partial stroke damping apparatus are described herein. An example rotary valve actuator described herein includes a housing containing a first piston and a second piston opposite the first piston, where the pistons move in opposite directions to rotate a shaft of the rotary valve actuator. A damper is operatively coupled to at least one of the first piston or the second piston to slow the movement of the piston for only a portion of a stroke of the rotary valve actuator.

公开(公告)号：CA2768670C

公开(公告)日：2017-02-21

申请号：CA2768670

申请日：2010-08-30

Applicant: EMERSON PROCESS MANAGEMENT VALVE AUTOMATION INC

Inventor： TER HORST GERARD ,  VAN DORP ERWIN

IPC: F16K31/163 ,  F15B15/06 ,  F15B15/22

Abstract: Rotary valve actuators having partial stroke damping apparatus are described herein. An example rotary valve actuator described herein includes a housing containing a first piston and a second piston opposite the first piston, where the pistons move in opposite directions to rotate a shaft of the rotary valve actuator. A damper is operatively coupled to at least one of the first piston or the second piston to slow the movement of the piston for only a portion of a stroke of the rotary valve actuator.

公开(公告)号：CA2955431A1

公开(公告)日：2011-03-10

申请号：CA2955431

申请日：2010-08-30

Applicant: EMERSON PROCESS MANAGEMENT VALVE AUTOMATION INC

Inventor： TER HORST GERARD ,  VAN DORP ERWIN

IPC: F16K31/163 ,  F15B15/22 ,  F16F9/48

公开(公告)号：CA2768670A1

公开(公告)日：2011-03-10

申请号：CA2768670

申请日：2010-08-30

Applicant: EMERSON PROCESS MANAGEMENT VALVE AUTOMATION INC

Inventor： TER HORST GERARD ,  VAN DORP ERWIN

IPC: F16K31/163 ,  F15B15/06 ,  F15B15/22

Abstract: Rotary valve actuators having partial stroke damping apparatus are described herein. An example rotary valve actuator described herein includes a housing containing a first piston and a second piston opposite the first piston, where the pistons move in opposite directions to rotate a shaft of the rotary valve actuator. A damper is operatively coupled to at least one of the first piston or the second piston to slow the movement of the piston for only a portion of a stroke of the rotary valve actuator.