Vacuum Media Filtration for Swimming pools

Vacuum Media Filtration

Vacuum Media Filtration (VMF) is our companies specialist filtration area. It is the technology that we believe suits most commercial filtration applications.

Vacuum media filtration cost efficiencies and reliability is what sets VMF filtration system apart from alternative filtration options.   

Vacuum media Filtration

Vacuum Media Filtration, or Vacuum DE as it is called in some circles, has a long history of successful/economic operation in many swimming pools around both New Zealand and in other countries.

The  first Vacuum Media Filtration system to be installed in New Zealand was in Christchurch for the 1974 Commonwealth Games.

How Vacuum Media Filtration works 
Vacuum media filters are based on the principal of  elements that are contained within an open tank constructed from either  concrete or more recently fiberglass. The elements are constructed from ABS and  are enclosed in a bag constructed from polyethylene fabric. This fabric  supports the media through which the water passes. When one of these filters is  started up or after one is backwashed, a "precoat" of media is added  to create a layer approximately 1.5mm thick on the fabric. After this a dosing pump adds a small "body feed" amount of the media continuously until  the filter requires backwashing. Addition of the bodyfeed stops the top layer of media becoming clogged with filtered dirt and thus lengthens the filter cycle, keeping the operation as economic as possible. Through our experiences  of operating these filters we would expect filter cycles of at least 6 to 8 weeks between backwashes. 

Backwashing involves shutting down the pumps, hosing down the elements and then starting up the system again before adding the precoat. Typically backwashing takes about 2 to 2½ hours depending on the filter size. 

One of the big benefits of a vacuum media system is that the open tank allows you to view the elements and directly see the point of filtration. This allows you to gauge the filters condition and performance at a glance.

This is particularly helpful during busy periods such as school holidays when increased loading's place more stress on filtration systems.

Why Purifibre 

Traditionally Diatomaceous Earth (DE), an economic filter media,  has been used in both pressure and vacuum media filters for many years without understanding DE chemical composition. Awareness of the adverse chemicals in DE , Ian Coombes  began the search for a safer, less expensive filter media alternative and ended up developing Purifibre.

Purifibre is  a food grade cellulose based filter media. This sustainable filter media is non- carcinogenic, biodegradable  and proven in the NZ pool environs to filter out Cryptosporidium Cysts. 

Purifibre is more expensive than DE on a per weight basis,  however because of the integrity of the filter material less Purifibre media is required than traditional DE resulting in a saving of up to 25% on media filter material.  

DE is no longer the preferred  filter material of choice and is a registered banned substance in many US states today. However there is no equivalent legislation governing the use of DE in NZ pool filtration systems at present.    

For me information please see the below downloadable brochure for Purifibre

Aquaboss Vacuum Media Filters
Aquaboss is manufactured and installed by Ian Coombes specialist water services technicians to ensure effective and efficient swimming pool filtration.  Aqua Boss filters are the latest in swimming pool filtration technology. With the ability to provide sparkling water on a  8-16 week filter cycle,  allows the conservation of millions of liters of water per year. Aqua Boss Vacuum media filters are setting  the new benchmark for water conservation in swimming pool filtration.  

How they work
Aquaboss filters use the Vacuum Media Filtration Principal. They operate by drawing the water through an open tank full of filter elements. Each Filter element has a filter area of more than 1m² and is coated in a non toxic, non carcinogenic, cellulose media called Purifibre.

Purifiber filters the pool water removing particles of 2 -3 microns
Long filter cycles are made possible by our patented hopper technology. The hopper continuously adds a measured amount of Purifibre to the filter every day, refreshing the media and extending the filter cycles.

When the end of a filter cycle is reached the  pumps are simply switched and the filter is drained directly into the sewer.  Each filter element is easily hosed off with our washer wand that connects to  mains pressure water and the fibre is washed down the drain. 

The results of longer filter cycles in significant saving in water, chemical and labour costs per year .

Aquaboss Vacuum Filtration system allows 

  • Fine Water Filtration
  • Significant Water Saving
  • Efficient and independent mechanical operation 
  • Easy Visual assessment of filtration process stages 
  • Lower maintenance costs
  • Labour savings as less supervisory system time required.       
  • Long Product Life

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