Commercial Products

Mechanical Filtration

Choosing the Correct Filter

Prosep & Baker Hydro Cartridge Filters

FSI X100 Cartridge/Bag Filter Housing

Hidroclean Cartridge Filters

Pressurised Sand Filters

TMC Mechanical Bag Filters

TMC Filter Bag Housings

Swirl/Screen/Drum Filters

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 that 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 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.

Cartridge Filter	Advantages	Disadvantages	Applications
	• Small footprint • High surface area	• Difficult to clean: sometimes requires the use of chemicals • Pressurised • Replacement cartridges expensive	• Low flows with low to medium suspended solids • 1 - 50 µm
Sand Filter
	• Variety of media can be used	• Water loss during backflushing • Risk of channeling • Needs to be pressurised	• Medium to high flows with low to medium suspended solids • 21 µm
Bag Filter
	• Replacement bags inexpensive • Very little head loss • Gravity fed or pressurised	• Low surface area • Needs to be cleaned and replaced regularly	• Low flows with low to medium suspended solids • 50 - 400 µm (gravity fed) • 1 - 100 µm (pressurised)
Screen Filter
	• Separates solids from system water • Medium maintenance	• Limited installation options • Gravity fed only	• Medium to low flows with medium to high suspended solids • 200/300 µm & 300/600 µm
Drum/Disc Filter
	• Separates solids from system water • Low maintenance • Fine filtration of high water flows	• Expensive • Large footprint	• High flows with medium to high suspended solids • 10 - 100 µm
Swirl Filter
	• No replacement of mechanical parts	• Large footprint • Does not remove fine particles	• Low to medium flows with medium to high suspended solids • > 1mm