Fisher 3560 Valve Positioner Manual Pdf
Fisher 3560 Valve Positioner Manual Pdf ===== https://urluso.com/2t9N7C
The Positioner is used to control the flow of a product by changing the position of the valve. The positioner is normally placed between the controller and the control valve. The positioner may be a rotary valve positioner, a linear valve positioner or a combination of the two. The actuator and positioner may be integrated into a single unit.
Valve positioners are often found in combination with other positioners or sensors that provide other types of feedback. For example, an Actuator positioner may be coupled to a Jet Valve positioner that provides a speed control function. This would allow a more rapid control response than that possible with a jet valve alone. The Actuator positioner would, in turn, be coupled to the valve that the Actuator is controlling. The Actuator positioner would provide the desired valve position until a desired position was achieved. If the valve should be moving too fast, the actuator positioner would then send a signal to the actuator to stop the movement of the valve.
The Positioner is used in several different ways. The positioner may simply hold the valve open. It may send a signal to the actuator to change the position of the valve. The positioner may also store a desired set point from the controller. When the control valve is being operated, the positioner will compare the process variable to the desired set point. If the process variable is greater than the desired set point, the positioner will send a signal to the actuator to move the valve toward the open position. If the positioner is storing a desired set point, this desired set point will be sent to the actuator by the controller.
A positioner is one of the most important devices in a process control system. The term Positioner comes from the positioning action it performs. A positioner acts as a feedback control device. When the positioner receives input from the controller, it will change its control valve position. The positioner changes the output of the actuator that is being controlled. Change in the positioner output is, in turn, reflected in the position of the controlled actuator.
Refer to separate instruction manuals for information on the actuator and control valve. Do not install, operate, or maintain a 3660 or 3661 positioner without being fully trained and qualified in valve, actuator and accessory installation, operation and maintenance. To avoid personal injury or property damage...
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