Mechanical Filter for Water Treatment with Activated Carbon/Fiber
August 24 10:45:45, 2025
Model NO.: DMF
Media: Quartz Sand
Tanks Quantities: 1-10
Tank Size: 16-96"
Housing: Carbon Steel/Stainless Steel
Working Pressure (Max.): 10 Bar
Backwash Pressure (Min.): 2 Bar
Pressure Loss: 0.2-0.5 Bar
Back Time: 20-200s
Application: Industrial/Irrigation
Control Way: Differential Pressure/Time/Manual
Trademark: CDFS
Transport Package: Corrugated Paper Plus Plastic Film
Specification: 28"
Origin: China
HS Code: 8421219990
Technical Requirements
Minimum pressure: 0.15Mpa Maximum pressure: 1.0Mpa Working temperature: <65ºC Tank thickness: 4/6/8mm Power: 220V/110V/battery
Working Principle
The Filtering Process Media filters, also known as depth filters, operate by passing water through a thick layer of graded particles, referred to as the filter bed. These particles can be sand, gravel, or other granular materials. The filtration efficiency depends on the effective size of the media and the water velocity through the filter.
Raw water enters from the filter inlet (1) and percolates through the filter bed (2). Suspended materials come into contact with the media particles and attach to them. Clean water flows through the filtration nozzles (3) and exits via the outlet valve (4).
As dirt accumulates in the filter bed, the pressure differential across the filter increases. When it reaches its maximum design value, a cleaning process should be initiated. In automatic media filters, a pressure differential switch detects this and triggers the self-cleaning process.
The Cleaning Process
Cleaning is achieved through backwashing, where pressurized water flows in the reverse direction—upwards from the nozzles, causing the filter bed to suspend and release the trapped suspended matter. The dirt particles are then washed out through the back-flush valve. In automatic systems, the controller initiates the cleaning process when the pressure differential reaches a preset value.
Sand Filter Specification Sheet Table
Model
Vessels QTY
Max. flow (agri.)
Max. flow (indus.)
Min. pressure
Max. pressure
Backwashing flow
Water in/out (mm/inch)
DMF24-2-A
2
30
22
0.2
1.0
15
80 / 3
DMF24-3-A
3
45
33
0.2
1.0
19
80 / 3
DMF28-2-A
2
60
30
0.2
1.0
30
100 / 4
DMF28-3-A
3
90
45
0.2
1.0
50
100 / 4
DMF32-2-A
2
75
40
0.2
1.0
35
100 / 4
DMF32-3-A
3
115
60
0.2
1.0
50
150 / 6
DMF36-2-A
2
80
70
0.2
1.0
40
100 / 4
DMF36-3-A
3
120
105
0.2
1.0
50
150 / 6
DMF48-2-A
2
160
100
0.2
1.0
80
150 / 6
DMF48-3-A
3
240
150
0.2
1.0
80
200 / 8
  Remark: The agri.- agricultural, The indus- industrial.
            The flow is different when used for agricultural and industrial applications. Â
Multi Vessels Auto Sand Filter Dimensions
Â
Model
D
L
W
H1
H2
H3
h (agri.)
h (Indus.)
DMF24-2-A
600
1330
630
130
1215
1450
400
600
DMF24-3-A
600
2030
630
130
1215
1450
400
600
DMF28-2-A
700
1520
720
140
1305
1580
400
600
DMF28-3-A
700
2320
720
140
1305
1580
400
600
DMF32-2-A
800
1720
820
140
1345
1620
400
600
DMF32-3-A
800
2620
820
170
1395
1695
400
600
DMF36-2-A
900
1920
920
140
1385
1660
400
600
DMF36-3-A
900
2920
920
170
1440
1740
400
600
DMF48-2-A
1200
2620
1220
170
1593
1925
400
600
DMF48-3-A
1200
4020
1220
200
1648
2005
400
600
Packing Picture
Company Introduction
       In 2002, Dawn Environmental Protection Technology Co., Ltd. was founded, which is an emerging technology company specialized in environmental water treatment. The main products include water filtration, water descaling, antiscale, and water heating for industrial and irrigation.        In 2010, the first patent was awarded.        In 2014, we built our own factory covering an area of 13,000 square meters, which is the largest domestic water filter production base.        In 2015, Hunan Dawning Filter System Tech. CO., Ltd (CDFS) was founded as a subsidiary for foreign trade.        In 2016, the quotation system became available.        In 2017.1, an integrated filtration system testing platform was built.        In 2017.3, we introduced automatic surface treatment equipment.        In 2017.8, we expanded the factory area to reduce lead time for customers.        More developments continue...
