Model P.C.T. Series
The Pre-Coat filter is well know for its superior performance as a filter system. In the case of the Atlas Filter the water is pumped in at the bottom of the tank, through a non return flap valve, and flows, from the outside, through a vertically placed polyester cloth filter bag coated with Pre-Coat Filter. The filtered water is then pumped out through the top of the tank back into the pool. The filter is backwashed by reversing the flow through the filter tubes.
The system is easy to operate and maintain, saves water and energy and ensures superior water clarity.
A large filter area is achieved by vertically placed filter bags, supported on special configuration cores. The result is a compact plant size with the ability to cope with very large bathing loads. This makes the product a cost-effective solution for filtering large public swimming pools.
The Atlas filtration system can be used for both fresh and salt water filtration.
The tanks are of a solid steel plate, stainless steel or composite fiber glass construction. All seams are welded internally and externally by qualified coded welders. The tanks are complete in every respect with necessary pressure gauges, air release valves, plus all necessary fittings.
Complete consideration is given to corrosion protection in the form of sand blasting, galvanizing and 3 coats of Copon Epoxy Bitumen to 320 microns. Then internal filter elements are constructed of patented injection moulded ABS cored covered by Polyester/Polypropylene bags which are heat set. The tubes are held down by a pressure planet and inert rubber “O” rings. The spacings of the elements are 37mm apart, thus avoiding any by bridging during the filtration cycle. The internal design conforms strictly to the N.S.F codes laid down for this particular type of filtration.
The tanks are manufactured from solid steel plates with the wall thickness varying between 8mm and 16mm depending upon the model. Likewise the manifold varies in thickness from 12mm to 30mm. All seams are welded internally and externally by qualified coded welders. The tanks are complete in every respect with pressure gauges, air release valves and butterfly valves, plus all necessary fittings.
Testing pressure is 7.0 bars for a working pressure of 2.0 bars.
Method Of Backwash
Method of backwash is by means of reverse flow butterfly valves which are fitted to each filter. The water inlet at the bottom of the tank and the clear water outlet at the top of the tank, plus the vertical rube element design give complete disposal for the filter aid and solids under reverse flow conditions.
When the flow is stopped , the filter aid settles the bottom of the tank and is then redistributed in a different porosity when the filtration cycle is restarted. A patented diffusion inlet manifold ensures turbulence and complete redistribution of the filter media.
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The flow rate is calculated at 1,0 liters to 1,25 liters per second per m² of filter area of filter area. The amount of effective filter area per tank in different models is 20m2, 30m2, and 40m2.
Advantages of Atlas Filtration Systems
• Effective and simple use of superior natural filter media. (Diatomaceous Earth, alternatively Perlite).
• Ease of Operation.
• Saving in water and energy (large saving in electricity due to shorter running hours).
• Economical, long runs between backwashing.
• Superior water clarity and sparkle, and hence lesser chlorination requirement.
• Small, compact, size of plant. ATLAS filter plants require less space than any other type of filtration plant.
• Ability to cope with large bathing loads.
• Cost effective solution for filtration of large swimming pools.
• Can be used for salt water filtration.
• No critical flocculation required . (No coagulant chemicals required and the pH correction chemical requirement is therefore also considerably reduced). Independent tests by various public authorities have shown that this method of filtration is most economical to operate. There is no critical flocculation required and the extended runs between backwashing significantly reduces running costs.
• Lower capital costs :
Capital cost saving of 20% due to large filter area per tank. ( i.e. Less filter tanks required and smaller plant room required.)
• Saving in maintenance costs.
• Lower plant room floor loadings – construction saving.
• Possibility of filter bed channelling eliminated.
• Optimum performance of the filter recirculation plant.
• Flexibility : Each filter tank has its own pump and motor and can run completely independently. (i.e. use only a portion of the total plant during reduced bathing load periods).
• Large saving of backwash water.
i.e. Less chemical costs
Less make up water required
Less chemicals required for pH correction & chlorination of make up water.