Disc Filter – The Ultimate Protective Barrier for Irrigation Systems

In modern agricultural irrigation, water quality management is crucial. The disc filter, as an efficient and reliable water filtration device, utilizes its unique multi-layer disc design to effectively remove suspended solids and particulates from water, ensuring the smooth operation of the irrigation system.

Its automatic backwash function not only reduces maintenance costs but also enhances the operational efficiency of the system. In irrigation systems, disc filters are commonly used in conjunction with primary filters as secondary filters. Whether in drip or sprinkler systems, disc filters provide stable filtration performance, making them an ideal choice for agricultural irrigation.

A disc filter and a filter element
Working Principle

The disc filter element is composed of a set of discs with grooves on both sides. The intersection points formed by the groove edges can trap solid particles in the water. Due to the simultaneous surface interception and depth coagulation effects, the filtration efficiency is greatly improved.

Filtration Process:

Water enters the filter through the inlet. As it passes through the filter discs, the discs are tightly pressed together under the force of the spring and hydraulic pressure. Impurity particles are trapped at the intersection points of the discs, and the filtered water flows out through the main channel of the filter.

Backwash Process:

Disc filters can be manually or automatically washed. For manual washing, the filter element can be removed, and the compression nut loosened, then rinsed with water.

For automatic washing, when a certain pressure difference or time is reached, the system automatically enters the backwash state. The controller adjusts the valve to change the water flow direction, and the backwash pressure tightens the spring, loosening the discs. The nozzles on the filter element's support column spray tangentially, causing the discs to rotate and wash away impurities trapped on the discs. When the backwash is completed, the flow direction changes again, the discs are pressed tightly once more, and the system re-enters the filtration state.

A disc filter element and a detail view of the disc
A diagram of the working principle of a disc filter
Features
  • The housing is made of high-pressure-resistant plastic, which is sturdy and has a long service life.
  • The filter element's disc has a deep groove design with micron-level filter rating, capable of accommodating a large amount of dirt and impurities.
  • It has a large filtration area and low friction loss, allowing for longer intervals between cleanings.
  • It has a simple structure, easy to install, and the spiral locking design allows for convenient removal and cleaning of the filter element.
  • Various specifications are available to meet different filtration needs.
  • A y-type filter and a filter cartridge

    Y-type Disc Filter

  • A t-type filter and a filter cartridge

    T-type Disc Filter

  • A h-type filter and a filter cartridge

    H-type Disc Filter

Y-Type Disc Filter

The Y-type Disc Filter is mainly composed of a housing and a disc filter element, providing micron-level in-depth filtration with high filtration efficiency and large contaminant capacity.

The Y-shaped design is suitable for confined spaces, and the filter element is easy to disassemble, making cleaning and maintenance simple.

Structure
  1. Disc Filter Element
  2. Spring
  3. Housing
A disassembled Y-type disc filter
Specifications
2 dimensional diagrams of y-type disc filter
Table 1: Y-Type Disc Filter Dimensions
Model H
(mm)
W
(mm)
D
(mm)
YD-1 173 176 93
YD-2 173 192 83
YD-3 173 176 93
YD-4 173 192 83
YD-5 230 250 120
YD-6 230 250 120
YD-7 260 290 140
YD-8 330 360 168
YD-9 330 360 168
Table 2: Y-Type Disc Filter Technical Parameters
Model Connection Pipe Diameter
(BSP/NPT)
Filter Rating
(Mesh)
Maximum Flow Rate
(m3/h)
Working Pressure
(bar)
Filtration Area
(cm2)
Weight
(kg)
YD-1 3/4" 120 5 8 180 0.39
YD-2 3/4" 120 5 8 195 0.35
YD-3 1" 120 6 8 180 0.39
YD-4 1" 120 6 8 195 0.35
YD-5 1-1/4" 40 / 80 / 120 / 150 10 8 300 0.96
YD-6 1-1/2" 40 / 80 / 120 / 150 14 8 300 0.96
YD-7 2" 40 / 80 / 120 / 150 25 8 525 1.36
YD-8 2-1/2" 80/120 30 8 600 2.60
YD-9 3" 80/120 35 8 600 2.70
T-Type Disc Filter

The T-type disc filter mainly consists of a filter element, a housing, and atop cover. Its inlet and outlet are usually located on the same side, forming a 'T' shape. This design is suitable for confined spaces.

Structure
  1. Pressure Detection Interface
  2. Pressure Detection Interface
  3. BSP/NPT Connection Port
  4. Drain Bolt
  5. Housing
  6. Disc Filter Element
A T-type disc filter and a filter cartridge
Specifications
Dimensional diagrams of 2 T-type disc filters
Table 3: T-Type Disc Filter Dimensions
Model H
(mm)
X
(mm)
D
(mm)
TD-1 280 205 139
TD-2 280 205 139
TD-3 280 205 139
TD-4 620 320 220
TD-5 740 320 220
TD-6 630 320 220
TD-7 750 320 220
TD-8 630 340 220
TD-9 750 340 220
TD-10 480 292 233
TD-11 630 292 233
TD-12 528 355 233
TD-13 678 355 233
Table 4: T-Type Disc Filter Technical Parameters
Model Connection Pipe Diameter
(BSP/NPT)
Filter Rating
(Mesh)
Maximum Flow Rate
(m3/h)
Working Pressure
(bar)
Filtration Area
(cm²)
Weight
(kg)
TD-1 1-1/4" 40 / 80 / 120 / 150 10 8 300 1.01
TD-2 1-1/2" 40 / 80 / 120 / 150 14 8 300 1.01
TD-3 2" 40 / 80 / 120 / 150 20 8 300 1.03
TD-4 2" 40 / 80 / 120 / 150 / 200 / 300 30 10 1200 6.2
TD-5 2" 40 / 80 / 120 / 150 / 200 / 300 30 10 1700 7.2
TD-6 2-1/2" 40 / 80 / 120 / 150 / 200 / 300 40 10 1200 6.4
TD-7 2-1/2" 40 / 80 / 120 / 150 / 200 / 300 40 10 1700 7.3
TD-8 3" 40 / 80 / 120 / 150 / 200 / 300 50 10 1200 6.5
TD-9 3" 40 / 80 / 120 / 150 / 200 / 300 50 10 1700 7.4
TD-10 2" 40 / 80 / 120 / 150 / 200 / 300 30 10 1050 4.2
TD-11 2" 40 / 80 / 120 / 150 / 200 / 300 30 10 1660 5.4
TD-12 3" 40 / 80 / 120 / 150 / 200 / 300 50 10 1050 4.6
TD-13 3" 40 / 80 / 120 / 150 / 200 / 300 50 10 1660 5.9
H-Type Disc Filter

The main structure of the H-type disc filter is H-shaped, primarily composed of 2 disc filter elements and a plastic housing. Its inlet and outlet are usually located on both sides, forming an 'H' shape. This design facilitates the observation and cleaning of the filter.

Structure
  1. Plastic Housing
  2. Disc Filter Element
  3. Clamp
A h-type disc filter housing and 2 disc filter elements
Specifications
Dimensional drawing of 2 H-type Disc Filters
Table 5: H-Type Disc Filter Dimensions
Model H
(mm)
W
(mm)
D
(mm)
HD-1 940 335 220
HD-2 1200 335 220
HD-3 960 340 220
HD-4 1220 340 220
Table 6: H-Type Disc Filter Technical Parameters
Model Connection Pipe Diameter
(BSP/NPT/GRV)
Filter Rating
(Mesh)
Maximum Flow Rate
(m3/h)
Maximum Pressure
(bar)
Filtration Area
(cm²)
Weight
(kg)
HD-1 3" 40 / 80 / 120 / 150 / 200 / 300 50 10 2400 10.9
HD-2 3" 40 / 80 / 120 / 150 / 200 / 300 60 10 3400 13.1
HD-3 4" 40 / 80 / 120 / 150 / 200 / 300 70 10 2400 11.3
HD-4 4" 40 / 80 / 120 / 150 / 200 / 300 100 10 3400 13.5