Page 21 - Commercial Catalogue 2011

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Filter Type Advantages
Disadvantages Applications
Cartridge
Small footprint
Difficult to clean:
Low flows with
Filter
High surface area
sometimes requires the
low to medium
use of chemicals
suspended solids
Pressurised
1-50
µ
m
Replacement cartridges
expensive
Sand Filter
Variety of media can be used Water lost during Medium to high
back-flushing
flows with low to
Risk of channelling medium suspended
Needs to be pressurised solids. 21
µ
m
Bag Filter
Replacement bags inexpensive Low surface area
Low flows with
Very little head loss
Needs to be cleaned and low to medium
Gravity fed or pressurised
replaced regularly
suspended solids
50-400
µ
m (gravity fed)
1-100
µ
m (pressurised)
Screen Filter
Separates solids from system Limited installation options Medium to low
water
Gravity fed only
water flows with
Medium maintenance
medium to high
suspended solids
200/300
µ
m&
300/600
µ
m
FilterType Advantages
Disadvantages Applications
p.17
p.26
p.25
p.21
System Components
Mechanical Filtration:
Choosing the Correct Mechanical Filter
Mechanical filtration is possibly the most important filtration element of any re-circulatory filtration
system. Solid waste must be removed from the system quickly and effectively so that it is not
allowed to break down into undesirable compounds which will further pollute the system. Listed
below are a number of different types of mechanical filters which will clean the water to varying
degrees of fineness.The type of filter required will depend primarily on the flow of water to be
treated, the size of the particles which need to be removed and the clarity required. Different types
of filters can be used in series, to achieve the desired water quality criteria.
www.tropicalmarinecentre.co.uk Tel: +44 (0) 1923 284151 Commercial Catalogue 16