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