Rotor Detection System-GEA Group Aktiengesellschaft

The use of plastic rotors in demountable rotary valves has proven to be a viable solution to eliminate metal contact, which can occur with full stainless steel construction.

However, plastic rotors are not suitable for all applications, such as abrasive or high temperature products, or for CV applications that require stainless steel rotors to be used. For applications that involve abrasive materials or high temperatures (and limited tolerances), GEA has developed a special monitoring device to manage the potential risk of rotor scraping. The robust Generation 3 RDS has been specifically designed to meet CIP requirements and is ATEX-compliant. The Generation 3 assembly uses longer life bearings in the rotary valve unit and a solid stainless steel — serviceable — rotor. Retrofitting existing Generation 1 and Generation 2 RDS systems and/or RDS-free rotary valves is also possible.

Features

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When fitted, this device continuously monitors the rotor and the valve housing, immediately providing a warning of any rotor contact or the presence of a metal shaving lodging between the rotor and the body. Generation 3 RDS features include:

detection range of 0–120 ohms ATEX rated (with compliant barrier)
CIP compatible
circuit monitoring
offline testing
data recording to preserve history
can be used in direct drive or chain drive systems
Modbus RS485 and TCP/IP networkable
speed output/motion detection
mounting distance up to 200 m
Windows configurator interface RS485 and micro USB
all settings can be downloaded
maintenance management system
seal controller
instant output signal from any metal contact
failsafe monitoring with fault output signal
confirms valve rotor is running free after reassembly and commissioning online
adjustable sensitivity via control module
24 volt DC
dual setpoint

Options

Seal pressure control
Seal wearing / worn out alarm
Drive start control
Rotor detection system (RDS) option is available on all GEA demountable rotary valves, including the easy slide rotor support option.

Applications

Monitoring rotor to housing contact
Use for warning or process shutdown when rotor contacts the valve body
Use with close tolerance stainless steel rotor applications
Use in high temperatures applications, to detect any rotor contact with the valve housing
Use with abrasive products
Use in the feeding to filling lines
Use at the bottom of cyclones

Control Module

Controls RDS System
24V DC, DIN rail mounted
Includes ATEX compliant barrier
Modbus/RS485 network communication
LED status indication
Separate contact/system fault outputs
CIP mode

Interface

PC interface for system setup and diagnostics
Modbus/RS485 network communication
USB PC connection
Adjusts material/CIP conductivity setpoints
Adjusts on/off/debounce/latch setpoints
Logs operating data
Offline testing and diagnostics

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