Atlas Copco AWC160

Instruction Manual
12 LRP200000228 Issue A
can start to boil and this may result in cavitation. (Cavitation occurs when vapour bubbles formed at the
suction inlet are transferred to the discharge outlet, where the bubbles collapse under pressure with
potentially destructive force.)
You should therefore ensure that the temperature of the sealing liquid supply is as low as possible. If the
temperature of the process gas is > 80 °C, consult Atlas Copco Application Engineers for advice.
2.5.2 Use of water based sealing liquid
If you use a water based sealing liquid, where ambient temperatures can fall close to 0 °C or below, take
appropriate precautions to ensure that the liquid does not freeze and damage the pump.
Such precautions may include the addition of ethylene glycol anti-freeze to the liquid, in concentrations to
suit the climatic conditions. You must not use other types of anti-freeze, without consulting Atlas Copco.
Table 9 – Sealing liquid supply data
Sealing liquid pressure
> outlet pressure + 0.05 bar, 5 x 10
3
Pa
Sealing liquid
Maximum viscosity
*
1 x 10
-5
m
2
s
-1
Maximum density*
1200 kg m
-3
Maximum flow rate
See Table 6
Maximum temperature
80 °C
* Contact your supplier or Atlas Copco if you want to use a sealing liquid with higher density/viscosity.