Valve Positioners
Positioners are most commonly used to move a control valve to a specified position so that a process meets specific parameters (flow, pressure, temperature). Fisher® positioners have the reputation of providing the most accurate, robust, and reliable performance in the industry.
Digital valve controllers use microprocessors and have become the dominant replacement technology for conventional and electro-pneumatic positioners since the mid 1990s. Fisher® FIELDVUE™ digital valve controllers integrate functionality far beyond the traditional analog or pneumatic positioner. The benefits of using a FIELDVUE digital valve controller include: Availability of equipment alerts to notify the user of pending issues, automated configuration, calibration and tuning , and access to advanced levels of valve assembly diagnostics. This provides consistent and predictable knowledge of valve assembly performance and condition regardless who performs the task.
Pneumatic Positioners
Positioners are most commonly used to move a control valve to a specified position so that a process meets specific parameters (flow, pressure, temperature). Fisher® positioners have the reputation of providing the most accurate, robust, and reliable performance in the industry.
Conventional pneumatic positioners receive a pneumatic control signal and translate that into the appropriate pneumatic output signal to the control valve actuator.
Electro pneumatic positioners
Positioners are most commonly used to move a control valve to a specified position so that a process meets specific parameters (flow, pressure, temperature). Fisher® positioners have the reputation of providing the most accurate, robust, and reliable performance in the industry.
Electromechanical positioners are conventional pneumatic positioners that have an additional integrated electro-pneumatic transducer.
Digital Positioners
Digital valve controllers use microprocessors and have become the dominant replacement technology for conventional and electro-pneumatic positioners since the mid 1990s. Fisher® FIELDVUE™ digital valve controllers integrate functionality far beyond the traditional analog or pneumatic positioner. The benefits of using a FIELDVUE digital valve controller include: Availability of equipment alerts to notify the user of pending issues, automated configuration, calibration and tuning , and access to advanced levels of valve assembly diagnostics. This provides consistent and predictable knowledge of valve assembly performance and condition regardless who performs the task.