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.

Courtesy of  Ifm