17 Preparation and maintenance of the cooling medium
EN
86
Rittal Liquid Cooling Package
17
Preparation and maintenance of
the cooling medium
Depending on the type of installation to be cooled,
certain purity requirements are placed on the cooling
water in a recooling system. According to the level of
contamination and the size and design of the recool-
ing systems, a suitable process is used to prepare
and/or maintain the water. The most common types of
contamination and frequently used techniques to
eliminate them in industrial cooling are:
Tab. 42: Cooling water contaminants and treatment
procedures
Type of impurity
Procedure
Mechanical contami-
nation
Filter the water using:
Mesh filter, sand filter, cartridge
filter, precoated filter, magnetic
filter
Excessive hardness
Soften the water via ion ex-
change
Moderate content of
mechanical contami-
nants and hardeners
Treat the water with stabilisers
and/or dispersing agents
Moderate content of
chemical contami-
nants
Treat the water with passivators
and/or inhibitors
Biological contami-
nants, slime bacteria
and algae
Treat the water with biocides
Note:
For the proper operation of a recooling sys-
tem that uses water on at least one side, the
composition of any additive used or system
water should not deviate substantially from
hydrological data presented in section 16.1
"Hydrological information".
