Coarse and fine screens

Differential water level measurement for control of screen raking

Application

Mechanical cleaning removes larger, floating and entrainedmatter from the intake rakes, screens or sieves. This protects the following process stages from buildup, clogging and abrasion. Solids with diameters greater than 25 mm are trapped in the coarse screens, sometimes finer secondary screens remove smaller residual materials. The screenings are processed in a press and then disposed of.

Recommended Products

VEGAPULS WL 61

The difference between the water level either side of the screen indicates the degree of contamination of the screen and activates the rake or cleaning process

Reliable, maintenance-free measurement
Simple installation thanks to contactless measuring principle
Unaffected by foam or condensation

Measuring range - Distance

15 m

Process temperature

-40 ... 80 °C

Process pressure

-1 ... 2 bar

Hydrostatic level measurement as an alternative: VEGAWELL 52

The difference between the water level in front of and behind the screen indicates the degree of contamination of the screen.

Wear-free measurement due to ceramic measuring cell
High accuracy and repeatability via small pressure ranges
High long-term stability

Measuring range - Pressure

0 ... 60 bar

Process temperature

-20 ... 80 °C

Process pressure

-

VEGAMET 625

Signal conditioning device and display instrument for two level sensors

Highly versatile use through three scalable current outputs for control of displays and downstream systems, such as PLC or SCADA
Simple integration into Intranet/Extranet through integrated web server
Simple data logging and history retrieval with integrated memory

Protection rating

IP 20/IP 30

Input

2 x 4 … 20 mA/HART sensor input with transmitter power supply (only HART capable sensors)

Output

1 x fail safe relay

1 x Ethernet

1 x RS232

3 x operating relay

3 x 0/4 … 20 mA current output

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