Shallow sand filter Technique Description
TX fully auto control Shallow sand filtering system is composed of
multipal standand high speed sand cylinders in which there
are some special designed water catchment and water distributors
with special dual direction auto washing valves. It can
realize single clyinder backwashing one by one under normal
operation condition ,The whose running period by auto control
with small backwash water volume,easy operation , large filtering
Mounting way can be horizontal or vertical option as per demand.
This filter is suitable for both industrialand civil engineering
circulated water treatment.
After absorbing the overseas advanced technology we have made joint
effortto develop new generation TX sery auto filter system with
compact structure. Its special design can make output water
turbidity below 0.5 NTU, the impurities filtering precision reach
5um.this machine can carry on auto backwash with lower running
Flushing filter status:
when system is under filtering status, the unfiltered water will
carry on auto water distribution averagely via our speical designed
distributor by via of layer flow status going through inside media
layer(Refined quartz sand or garnet grains), when water flow go
through media layer ,the impurites will stop on side and the clean
water will go down through bottom water cachement for collection.
As impurities in the filler layer continuous accumulation, the
internal press head loss will continue to increase. When the inlet
and outlet water pressure head loss reaches the set value, the
system will automatically activate the constant pressure device to
convert it to backwash state, when the end of this station
backwash, hydraulic valve to change the direction of the water one
by one in order to achieve backwash easier cleaning accumulate
When the system is in the backwash condition, filtration will
continue operation,in which, the backwash sand cylinder dont go
filtering , other standard cylinders will go on with filtering .
The filtered clean water , part is supplied for backwashing filter
, the other is still deliveryed to the user, and the backwash dirty
water will be discharged out through backwash valve .
In high speed sand cylinder auto clean and filter system, special
designed water cachement can make the media clean each other to
maximumize the backwash efficiency and reduce the needed clean
water for backwash with no media leakage or running together with
One standard cylinder backwash will last for 2 minutes,then stop
with its head lost reducing to a reasonable extent, constant
pressure device reset signal is given, the hydraulic valve is
returned to the filtering state, the next standard cell Sand Filter
is ready to enter the backwash state.
Media and volume:
TX can use ordinary various media but mainly based on quartz sand,
we recommend 2 kinds of quartz sand below
Cover the catchment
Ordinary filtering system combination
Fine Volume T/H
1.22 x 1.22 x 2
2.64 x 1.22 x 2
3.96 x 1.22 x 2
5.28 x 1.22 x 2
6.95 x 1.22 x 2
8.32 x 1.22 x 2
Comment:for those morer large flow volume , we can use more filter
unit by connecgting with different tube , valve with standard DIN
Characteristgic of the unit
1.With small volume and footprint ,compact structure ,horizontal or
vertical optional mounting indoor or outdoor to save cost and room.
2. With good errosion-proof and long life.
3. With large filter volume- can be boosted from 30m3/h into 2500
m3/h and large filter speed : around 40m/h, Maximum can reach 60m/h
as per waer quality. with excellent efficiency-impurities precision
can reach below 0.10mm with output trubidity below 0.5NTU.
4.automatic intelligent backwash with no man handle use filter
water, no need configue with boosting pump and backwash pump.
Backwash lasts around 2-3min with backwash flow<3m³.
5.constand water supply；when backwashing, filting process continue
running to suppy water.
6.Adopt special water distribution and cachement device to make
whole filtering sytem as layer flow and stable running.
7. Preferably using refined quartz sand or garnet as a filter
medium, according to the water quality to select, Min filter media
diameter can be 0.16mm
8.Lower cost of long term operation by ways of saving water,
electrictiy and maintenance charge
Electricity saving:special backwash valve to make all cylinder not backwash
simulaneously but separatively one after another under normal clean
water supply condition without any backwash pumps. Meanwhile, the
filter pump head can be 6-7m shorter than other pumps.
Water saving:special water complemetary or collectiong deivce can make its
backwash perid go stably and effectivly without configuring
compressed air .so the demand backwawh water is small , single
filter cylinder backwash need water volume is only 1 m3 per minutes
for lasting 2 or 3 minutes to finish one circle.
Maintenance charge saving:
the whole system backwash runs only by specialdesigned multipal
fuction valves which has feature of 10-year running no damage ,
long life and lower management cost instead of any mechnical or
elecricl driven valves.
1). Mounting field: Auto high speed filter is installed outdoor.
2).Control method:fully automatic control system
3).Main parts Material:
Body shell: Q235 with erosion-coating
Water Collector: Reinforced Plastics
Two-way valve material: Reinforced Plastics
4)Filter media and flow volume
It can fit for all ordinary media but mainly based on quartz sand,
we hereby recommend two accuracy quartz sand:
Bottom sand for covering Catchment
Upper sand (120-380mm thick)
Two-way hydraulic control diaphragm
1. Working principle
The switch of the diaphragm valve is controlled by reinforced
rubber diaphragm under pressure of pipeline: When the pressure
medium enter(water or gas) valve control chamber, the diaphragm
pressed downfoward to close the valve channel , when the control
chamber pressure output exhaust air or running under downstream
pipeline the diaphragm rises to make the valve channel open.
This valve doesn’t happen corrosion nor locking phenomenon with
great stability due to no shaft, seal gasket and positioning seat.
The only parts in its channel is diaphragm.
Our Various structural and control forms (manual and automatic) is
ideal option for a variety of fluid control needs.
2. Technique Condition
Casted iron or plastic
Bolt, Flange or others
10/15 year for PVC/Metal
3. Running feature
Press grade: PN10,or as per demand PN16 with Min start
Simple structure, easy commission and stable and safe running long
Can realize onsite maintenance without disclose all pipeline with
lower water head lost, fast exchange of water flow direction and
The water power control valve, namely backwash valve can be started
by pipeline pressure or other outer press sources to carry on
backwashing and impurities discharge timely. It can be adjustable
as per running condition or system setting to change models between
below 2 working
1. Filtering model:allow raw water go directly into the filter
through output pot.
2. Backwash model:cut down normal working valve input pot from
output channel , then start sludge output valve to carry on
backwash by removing impurities from the water.
Applicant of the filter
1. Industrial water filter –has some demand on water quality such
as filtering Oxygen lance water from steel factory , boilers and
heat exchangers feeding water to avoid clogging of the nozzle.
2. Industrial circulated water filtering system.
3. Raw water disposal--Surface water, lake water, sea water, water
reservoirs, wells water, waterworks water to remove grain, sand ,
SS, algage and organics in the wate.
4.Agricultrue irrigation—Especially for those water sources with
highflow , good impurities such as Farmland irrigation, park and
golf course turf irrigation
5. Industrial waste water treatment such as food industry , paper
and pulp,power plant , hospital clean water pre-treatment
6. Aquaculture, swimming and water park industry.
Main technical parameter of the filter unit
Mounting way Outdoor
Combination 5 cylinders as one group
Main pipeline DN DN200mm
Filter media Circulated water
Working temperature ≤55℃
Flow speed 35-45m/h
Single cylinder volume 45-55m3/h
Total filter volume 200m3/h
Total filter area 5.65m2
Working pressure 0.2-0.5 MPa
Running way automatically operation and backwashing
Filtering way quartz sand
Input water quality SS≤50mg/L
Output water quality SS≤5mg/L
Media layer height 400mm
Quartz sand grain DN 1.0-2.0mm
Auto backwash valve
Form :DN100 two-way three direction valve
Valve Material: reinforced Plastic
Controller: Made in China with pressure and time display switch and
Running duty: S1 continuously
Cylinder body:Q235－B carbon steel,
Filter element: Mushroom-type
Pipeline: 20# seamless S.S.
Flange pressure standard: PN= 1.0 Mpa
Outer device of the body
Water input nozzle: DN200 /PN1.0
Water output nozzle: DN200 /PN1.0
Water discharge nozzle: DN100 /PN1.0
Pressure gauge for input and output water : 2 pcs of Y100 0~1.0MPa
Whole system composition parts
Low layer sand filter
Auto air discharge valve
Input and output Manual valve
Discharge Manual valve