Emerson Process Management Valve Automation, Inc.

Erwin Van Dorp

Gerard Ter Horst

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.

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Bad Bentheim, Germany

Erwin Van Dorp