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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.
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