Automatic Stainless Steel Self-Cleaning Water Filter water filter
Automatic Stainless Steel Self-Cleaning Water Filter water filter How It Works
The unit consists of two stages of filtration, a coarse pre-filter and a stainless steel fine screen.
The unwanted solids accumulate on the inner surface of the fine screen, building up a filter cake,which filters out even finer particles, creating a pressure differential. Once the pressure drop reaches a preset level, a rinse cycle is activated by the factory supplied control system.
The solids are removed from the fine screen using a spot backwashing method, which aggressively sucks the dirt off the screen, similar to a vacuum cleaner, and are carried tothe drain via the rinse valve. The dirt collector rotates, ensuring the entire screen is cleaned each cycle. The process takes a matter of seconds, without interruption of system flow.
Control method
Filter has differential switch and integrator. Once the pressure drop reaches a preset level, a rinse cycle is activated by the PLC controller.
Feature
Structure compact
Low water consumption
Fine filter degree
Low pressure drop
Application
1、Chilling water treating: such like cooling tower, water supplement system, air conditioning system, heat exchange system.
2、Raw water treating: such like surface water, lake, sea water, tank water, well to remove grind, sand, algae, organism etc.
3、Cycling industry water: cooling tower, polishing process water, ion exchange water, spraying process water, heat exchange plant, rolling plant, casting plant etc.
4、Irrigation: farm, dip field, golf, lawn etc.
5、Recycle water
Filtration System Operation
Backwash Process
Filtration Process
- The contaminated water enters the tank through the inlet manifold, transitioning to the 3-way valve and into the top inlet of each tank
- The two-stage deflector creates a uniform distribution for laminar flow across the media bed while avoiding channeling of the media bed
- Particulate is trapped and retained within the media bed resulting in clean process water flowing out through the stainless steel wedge wire underdrain, to the outlet of each filter tank and to the outlet manifold for end use
Backwash Process
- Backwash sequence is initiated by either elapsed time of the controller or pressure differential between the inlet and outlet manifolds
- Water or air pressure opens the 3-way valve causing the reverse flow of a portion of filtered water up through the stainless steel underdrain to hydraulically and uniformly lift the media bed
- The use of a hydraulically balanced underdrain in conjunction with a gravel pack creates a proper and uniform lift of the media bed while avoiding a turbulent backwash
- Entrapped particulates are released during the backwash event, exhausted through the backwash manifold and routed to a convenient location
- One tank at a time is backwashed while continuing to process water for use until the entire system is clean
- Once completed with the backwash, filtration continues until the next backwash event .
Automatic Stainless Steel Self-Cleaning Water Filter water filter Control manner
Peide Backwash control valve is started by water pressure or an external power source.
Peide backwash control valve is composed of solenoid valve, hydraulic relay valve actuator or manual
three-way valve.
Peide filter backwash control valve outlet normally open (N.O.), drain valve normally closed (N.C.).
Each outlet is sealed by its own independent sealing seat, but they are controlled by the same stem of
seal diaphragm.
Valve is a complete, interactive set. When one outlet is turned on, the other outlet is in a closed state
Paralled filter system Mode of Backwash：
Inlet of valve is closed,backwash drain valve is open. It makes the flow reverse to the filter,so
that the impurities will be discharged from filter.
Silica sand: mined from silica bed. After milling, it becomes into irregular angular shape. When mixed
with concrete, it has a good adhesion, which can increase slurry strength.
Sea silica: with smooth outside, and even grind and with salty.
Technical Parameters
Performance parameters
Model | QLQ48-1 | QLQ48-2 | QLQ48-3 | QLQ48-4 | QLQ48-5 | QLQ48-6 |
Inlet & outlet Diameter | （100） | 200 | 200 | 200 | 200 | 200 |
Drainage | （80） | 100 | 100 | 100 | 100 | 100 |
Flow rate（M3/H） | 15-50 | 30-100 | 45-150 | 60-200 | 75-250 | 90-300 |
Maximum pressure（MPa） | 0.6（1.0） | 0.6（1.0） | 0.6（1.0） | 0.6（1.0） | 0.6（1.0） | 0.6（1.0） |
filter area（M2） | 1.13 | 2.26 | 3.39 | 4.52 | 5.65 | 6.78 |
total length （MM） | （1320） | 2640 | 3960 | 5280 | 6600 | 7920 |
Quartz sand（KG） | 860 | 1720 | 2580 | 3440 | 4300 | 5160 |
Drain valve interface | 4”×3” | 4”×3” | 4”×3” | 4”×3” | 4”×3” | 4”×3” |
For some bigger flow rate, parallel filter system can be used for one time.
1、 Filter medium and flow rate
Filtration precision | Filter material(12-40CM） | Recommend flow rate（M3/H） | Backwash flow rate（M3/H） |
General filter | Quartz sand | 40-50 | 35-55 |
1.0-2.0MM | |||
Precision filter, | Quartz sand | 15-25 | 25-40 |
Other diameter silica sand can also be used, which reaches into function of filter precision and stain resistance.
1、 Manufacturing materia
Filter chamber | Carbon steel（Epoxy asphalt coating paint） |
Filter medium | Delicate natural quartz sand |
Water distributor | Engineering plastics |
Water collector | Engineering plastics |
Sealing ring | Nitrile rubber |
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