SAND FILTER HOUSINGS AND CARTRIDGES TO REMOVE PARTICULATE MATTER FROM WATER SYSTEMS
• No maintenance or renewal of filter cartridges
• Restoration of filter capacity without disassembly
• Simple self-cleaning operation
• Four different sizes with full range of male BSP threaded fittings
• ¾”, 1”, 1¼”, 1½” & 2” models
• May be installed in horizontal or vertical pipework
When water supplies are heavily contaminated with suspended particulate matter such as sand, earth, and even rust (particularly water from bore-holes and wells), conventional filters and cartridges are prone to regular clogging of the filter surfaces, requiring frequent disassembly, washing and cleaning of the filter cartridge to maintain water flow quality and output.
In such situations, it is necessary to utilise a sand filter rather than a conventional filter, and the DEPURA CYCLONE has been optimised to handle this type of problem.
Water entering the filter housing is guided by a diverter plate so that it enters the filter chamber itself tangentially to the inner wall of the bowl, creating a whirlpool effect that utilizes centrifugal force to separate heavier particles from the main body of the water.
These particles gravitate to the base of the filter chamber where there is sufficient space to accumulate without covering and clogging the main filter cartridge.
The accumulation of solid matter may be monitored visibly through the green tinted bowl of the filter, and the impurities may be discharged when convenient simply by opening the discharge valve at the base of the DEPURA CYCLONE. This dumps them to a suitable waste by means of a waste hose (not supplied). This method allows considerable savings of water with respect to other cyclone filters, which often continually discharge water to waste.
DEPURA CYCLONES are simple and compact, and do not require any power supply. They are produced in materials suitable for use with both potable and process waters.
INSTALLATION:
IMPORTANT: To avoid malfunctioning, read these instructions carefully before installation or servicing, and always keep within easy reach.
Depura Cyclone water filters should be installed at the water main supply entry, immediately after the meter, with a bypass installation before and after the water filter as in diagram (B) (right) to enable the Depura Cyclone to be isolated if required.
Use compression joints and PTFE / Teflon tape when installing filter housings in pipe work. Use only parallel threaded fittings, and not tapered fittings, which may damage the threaded brass inserts in the filter body. Do not use hemp or jointing compounds. Keep blow-torches away from filter housing - heat travelling along pipe work may damage filter housing and loosen or weaken moulded-in threaded brass inserts.
Before installing, check that the operating pressure and temperature rating of the filter is adequate for your applications.
Ensure that hot water above rated temperature use does not enter filters, using a check valve if necessary in feed lines to hot water systems. If the mains pressure is higher than the maximum operating pressure of the filter or in areas where pulsating pressure and "water hammer" are experienced, install a pressure reducing valve before the filter.
Filter housings should be installed away from direct sunlight, which can encourage growth of algae if present in water, and away from areas where the water may freeze and over stress the bowl.
When installing the filter, leave enough space between the filter and wall or floor to allow for removing the bowl for cleaning and / or replacing the cartridge.
It is recommended that the filter be installed with a by pass system with valves (see diagram) in order that the filter may be disconnected from the water supply for maintenance and changing of the cartridge.
OPERATING INSTRUCTIONS
In order to carry out the cleaning procedure, simply turn the
discharge valve handle through 90°C in an anticlockwise
direction, as indicated in diagram B.
Keep the waste valve in the open position,
until the bowl is perfectly clear and all the
loose debris is eliminated.
Once the cleaning procedure is complete,
return to the normal operating mode by
closing the discharge valve.
The cleaning procedure should be
carried out frequently, at least once
every four days, to prevent deposits
from thickening and hardening.
If mud or clay are present, the filter
should be cleaned every day.
CHANGING FILTERS:
The frequency at which filters should be changed will vary with water contamination level, but as a guide, filters should be changed at least every three months. Reduced water pressure will indicate that filters should be checked, and changed if necessary.
Activated carbon filters should be changed prior to this if efficiency drops, indicating that absorption capacity has been used up. After changing activated carbon cartridges, run tap for 5/10 minutes to remove any carbon fines from the system before using water. Run drinking or cooking water taps for at least 10 seconds prior to using water, particularly if tap is not used daily, and longer if tap has not been used for a week or more.
