Mechanical Filter for Water Treatment with Activated Carbon/Fiber
August 24 10:32:31, 2025
Model NO.: DMF
Media: Quartz Sand
Tanks Quantity: 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
Backwash 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: 0.15 Mpa Maximum pressure: 1.0 Mpa Working temperature: <65ºC Tank thickness: 4/6/8 mm Power: 220V/110V/battery
Working Principle
The Filtering Process Media filters, also known as depth filters, work by passing water through a thick layer of graded particles, called 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 get attached. Clean water then 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 is required. In automatic media filter systems, a pressure differential switch senses this and triggers the self-cleaning process.
The Cleaning Process
Cleaning is done by backwashing, where pressurized water flows in reverse direction—upward from the nozzles. This causes the filter bed to suspend, releasing the trapped suspended matter. The dirt is then washed out of the filter through the back-flush valve. In automatic media filter systems, the cleaning process is managed by the system's controller. When the pressure differential switch detects that the differential pressure has reached a preset value, it signals the flushing controller to initiate the self-cleaning process.
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: agri. = agricultural; indus. = industrial.
The flow rate varies depending on whether it is used for agriculture or industry.
Multi Vessel Auto Sand Filter Dimensions
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 established, a company specializing in environmental water treatment. The main products include water filtration, descaling, and heating for industrial and irrigation applications.        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 water filter production base in China.        In 2015, Hunan Dawning Filter System Tech. Co., Ltd. (CDFS) was founded as a subsidiary for foreign trade.        In 2016, a quotation system was introduced.        In 2017, an integrated filtration system testing platform was built.        In 2017, automatic surface treatment equipment was introduced.        In 2017, the factory area was expanded to reduce lead time for customers.        More developments continue...
