efector Valvis Provides Continuous Position Indication of Linear Valves
 
 


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 efector Valvis Provides Continuous Position Indication of Linear Valves

  • The efector Valvis sensor is installed on top of a linear valve to reliably detect the stroke position up to 80 mm.

  • The sensor monitors single-seat and double-seat valves providing a condition-based monitoring solution.

  • On double-seat valves, the sensor detects the open position, closed position and seat-lift cleaning position.

  • On single-seat valves, the sensor detects the open position, closed position and provides an additional output for seal contact wear.


ifm's Innovative Multiplexed Sensing Technology

  • The sensor's principle of operation is based on ifm's multiplexed sensing technology

  • The sensor incorporates 16 individual air coils that are positioned closely together to create a linear inductive sensing field.

  • Each coil is connected to the microprocessor-controlled electronics. As a valve stem enters into the sensing field, the coils detect the valve stem at a resolution of 0.2mm.

  • Pushbutton setup establishes setpoints and an integrated LED display indicates operating status.

  • The resulting signal of the stem is compared with the teach-in switch points.


efector Valvis Monitors Seal Wear and Seal Parameters
As a predictive maintenance tool, efector Valvis can monitor seal wear and seal parameters. When sensor detects changes in the condition, it sends an alarm signal to a PLC which eliminates cycle-based maintenance.

efector Valvis sensors are available in two models: a 3-wire Micro DC version with analog output and a 5-wire Micro DC version with three switching outputs.