Endress+Hauser CUA252 Specifications
TI01139C/07/EN/03.19
71440424
2019-03-01
Products Solutions Services
Technical Information
CUA252
Flow assembly for CUS52D turbidity sensor
Application
The CUA252 flow assembly is designed for the installation of
the CUS52D turbidity sensor. It can be used anywhere process
medium is conducted in pipelines or, following sampling, is
held in closed pipes.
• Turbidity measurement at all stages of the water treatment
process
• Final turbidity measurement in outlet of waterworks
• Turbidity measurement in inlet of waterworks
• Turbidity measurement for filter monitoring and filter
backwashing
• Turbidity measurement in drinking water networks
Your benefits
• Easy wall or pipe mounting
• Variable mounting
• Self-venting with vertical installation
• Suitable for use in drinking water thanks to PE100 material
Function and system design
7
1
2
3
4
5
6
CUA252
Measuring system
A complete measuring system comprises:
• Flow assembly Flowfit CUA252
• Sensor Turbimax CUS52D
• Transmitter, e.g. Liquiline CM442
• Measuring cable
1 Measuring system
1 Process pipe
2 Measuring cable
3 Liquiline CM442 transmitter
4 Return line with shut-off valve
5 Turbidity sensor CUS52D
6 Flow assembly CUA252
7 Inlet with shut-off valve
2 Endress+Hauser
A0022262
CUA252
Installation instructions
Installation
2 Connection example with open outlet
A0022259
Endress+Hauser 3
CUA252
p1
p2
p1 > p2
1
A0022258
3 Connection example with bypass and orifice plate in the main pipe (supply from below)
1 Orifice plate
No measures to increase pressure are required for branch pipes (pipes that branch off from the
main pipe).
To achieve flow through the assembly with a bypass, pressure p1 must be higher than pressure p2.
Install the orifice plate in the main pipe → 3, 4.
‣
The inlet and outlet connection of the flow assembly are always identical. The system is symmetrical.
1. Install the flow assembly vertically.
2. Connect the inflow at the bottom end (upward flow in the pipe).
Avoid buckles and loops in the hose system.
Pay attention to the installation instructions (flow direction) for the sensor.
Many media tend to develop gas bubbles in a depressurized state. The operation of the flow
assembly under pressure (adjustable valve after the flow assembly) prevents this behavior in many
cases.
4 Endress+Hauser
CUA252
291 (11.46)
1
Mounting the flow assembly Mounting the assembly with wall holder unit
4 Wall holder unit. Engineering unit: mm (in)
1 Hanger bolt STST 10x60 (included in scope of delivery of wall mounting kit)
A0022264
Mounting the flow assembly in a bypass
1. Install a shut-off valve upstream and downstream from the flow assembly in the bypass line.
This makes it possible to perform maintenance tasks, such as the cleaning of the sensor,
without affecting the process.
2. Mount the assembly vertically.
3. Establish the medium connection using commercially available connection fittings.
Mounting the flow assembly in a branch pipe with an open outlet
1. Install a shut-off valve upstream from the flow assembly.
2. Mount the assembly vertically.
3. Establish the medium connection using commercially available connection fittings.
Endress+Hauser 5
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