Sand Filter

Quartz sand filter removes impurities from raw water to achieve water reuse. Filter is automatic operation and back-flushing, under control system of dp-switch (pressure drop), butterfly and PLC control system.

Sand Filter Pictures

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How does the sand filter works

Raw water passes inside water distributor into filter media layer (quartz sand), which let impurities stay at sand layer. Clean water flow out stably from water collector. When the pressure drop reaches the given value, the cleaning cycle is started. The rinse control start working at pressure drop value at 0.05-0.15MPa, return to 0.02-0.04MPa after back flushing.
Quartz sand inside tank mixed with coarse and fine sands. They are allocated above water distributor averagely. Even in back flushing, water consumption is little. Tank inside has rubber line and plastic line for option. It is for anti-corrosion, which ensure a tank can be used 10-20years. The completed filter control system has finished already in factory.

sand filter Technical Parameter

Single Flow Rate 6-300m3/H 
Design Pressure 7.5-16 bar 
Water inlet pressure 2.5-3 bar 
The Range of Working Temperature 20-120.C (68-248.F)
Seal Type O-ring and Washer 
Connect Method Flange 
Surface Treatment Matt Spray Beads, Mirror Polishing, Electropolishing 
Control Method Differential pressure switch, Time control and manual control
Filter sand type Quartz sand, activated carbon, Anthracite, fiber ball, resin 
Filter medium supply We can supply different kind filter medium and combination
Equipment Chamber Material Carbon steel 304ss or 316L
The key of filter effect water distribution and catchment technology

Where to use sand filter

Swimming pool, hotel spa, water entertainment, aquarium, fish farm
Irrigation in agriculture
Drinking water pre-treatment
Industrial recycled water, central air-condition system

We have models for choose

Sand filter with water enters from top

sand-filter-with-water-enters-from-top

Item Model Φ

(mm)

Height  

(mm)

Connect size  

(mm)

Filter area Flow rate  

(T/H)

1 QLQ500×700 520 816 40 0.2 6-10
2 QLQ600×766 620 874 40 0.28 8-14
3 QLQ700×819 720 899 40 0.38 12-19
4 QLQ800×872 820 957 50 0.5 15-25
5 QLQ900×1024 920 1104 50 0.64 18-30
6 QLQ1000×1079 1000 1164 50 0.79 23-39
7 QLQ1100×1131 1100 1211 50 0.95 28-47
8 QLQ1200×182 1200 1267 80 1.13 33-55

Sand filter with water enters from side

sand-filter-with-water-enters-from-side

Item Model Φ

(mm)

Height  

(mm)

Connect size  

(mm)

Filter area Flow rate  

(T/H)

1 QLQ1400×1700 1400 1700 100 1.54 45-75
2 QLQ1600×1800 1600 1800 150 2.01 60-100
3 QLQ1800×1900 1800 1800 150 2.54 75-125
4 QLQ2000×2000 2000 1900 150 3.14 95-155
5 QLQ2000×2000 2200 2000 150 3.8 115-190
6 QLQ2400×2100 2400 2100 150 4.52 130-210
7 QLQ2600×2400 2600 2400 150 5.3 145-225
8 QLQ2800×2500 2800 2500 200 6.15 155-240
9 QLQ3000×2600 3000 2600 200 7 170-255

Diagram on pressure drop

sand-filter-diagram-on-pressure-drop

Drawings help you understand clear

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sand-filter-installation2

Attentions in using

1. When quartz sand filter first into use, users should clean sand firstly, after that to start filtration.
2. Turn all operating valves slowly, to avoid water impact.
3. Keep sharp or hard things away from filter.
4. Keep away from fire and high temperature.
5. Make sure sand is clean when not using.

How to install sand filter

Before installing a quartz sand filter, please make sure the ground is strong and even. The space is big enough for connecting pipes, valves and repair.
The filter needs changes sands after using some time. Follow below steps one by one:
1.Take down control valve
2.Pour sand into tank, by covering a protective cover at the inlet to avoid sand inside
After replacing new sand, return control valve, connect tightly. Remember there’s a pressure gauge, but not fasten it tightly. Make sure each pipe connection is correct and no leak.

sand filter Inside look

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sand-filter-inside-look2

sand filter media

Natural quartz sand: contains SiO2, smooth and clean out appearance.
Quartz sand from mine bed: irregular shape of sand, with strong hardness.
Sea sand: smooth and clean out appearance.

sand-filter-media

sand filter fittings

sand filter fittings .jpg

sand filter fittings

sand filter Packing

sand filter Packing .jpg

If you are interested in our products,pls send your inquiry details to   info@hvacaqua.com