bar 120 BAR4023CG-HEC 2 Operator's Manual page 2

CLASSIFICATION
High Pressure Water Cleaning systems which include all BAR pressure cleaners are separated into two classes as per
Australian and New Zealand Standard 4233.1 & 2
Class A systems – Produce [pressure*flow] between 800 bar litres per minute and 5600 bar litres per minute.
Class B systems – Produce [pressure*flow] of 5600 bar litres per minute or greater.
A high pressure cleaning system cannot be reclassed by reducing available working pressure, the rating is based on
the units' maximum output capability.
The following graph provided by Safe Work Australia can assist you to determine the class of your system.
Bar litres per minute = pressure (bar) x flow (L/min)
For example –
1000 psi gives 68.9 bar pressure from the conversion table and let's say we want 60 L/min of flow. So if we follow the
graph, we can see that the lines meet in the green section which is class A and if we put the values into the formula
we get –
68.9 bar x 60 L/min = 4134 bar litres per minute
which justifies the system to be in the class A range as we witnessed from the graph.
Nozzle reaction force (newtons) = 0.182 x pressure (bar) x [ x (nozzle diameter / 2)
[Please refer to online catalogue page -
Guide for managing risks from high pressure water jetting, Safe Work Australia -
AS/NZS 4233.1:2013 High pressure water jetting systems – Safe operation and maintenance
AS/NZ2 4233.2:2013 High pressure water jetting systems – Construction and performance
This manual is provided as guidance only and does not guarantee compliance with the WHS Act and Regulations in all instances.
526 for nozzle diameter.]
This manual references or includes material from the following sources:
PRESSURE CLEANER OPERATOR'S MANUAL
Helpful conversions
Pressure
1 psi =
14.5 psi =
1000 psi =
2900 psi =
0.264 gallons =
1 gallons =
2.642 gallons =
7.925 gallons =
[ = 3.14]
https://www.safeworkaustralia.gov.au/
CLASSIFICATION
0.0689 bar
1 bar
68.9 bar
200 bar
Volume
1 litres
3.785 litres
10 litres
30 litres
(mm )]
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