Vertical Automatic Self-Cleaning Water Filter for Industrial Water Pretreatment

Product Introduction

This vertical self-cleaning filter assembled with heavy-duty water filter housing is a precision filtration device that directly intercepts suspended impurities in water through stainless steel wedge wire screen, purifying water quality and safeguarding downstream pipeline and process equipment. Water enters the self-cleaning filter through the inlet port. Powered by intelligent PLC and PAC control system, the unit automatically detects impurity accumulation and sends signals to blowdown valves for automatic sewage discharge. Unlike conventional filter products that feature limited holding capacity, easy fouling clogging, mandatory disassembly for cleaning and blind operation without real-time monitoring, this self-cleaning filter can perform screen cleaning and sewage draining online while the system keeps supplying water continuously. Operators can monitor running status remotely, with available filtration precision ranging from 50μm to 3000μm to satisfy diverse raw water and process requirements for industrial and agricultural water filtration.

Working Principle

Raw water flows into the filter housing from the inlet, and particulate contaminants are trapped on the outer surface of the stainless steel wedge screen, which gradually builds up a pressure difference between inlet and outlet. Once the differential pressure reaches the preset threshold, the electronic controller triggers the driving motor and blowdown valve. The motor drives the stainless steel brush assembly to rotate and scrub the screen surface thoroughly, while the blowdown valve opens to discharge collected sludge and impurities. The whole cleaning cycle only takes dozens of seconds. When cleaning finishes, the blowdown valve closes and the motor stops rotating, the filter returns to normal filtration mode and waits for the next cleaning trigger. The entire process runs automatically without cutting off the water flow of the pipeline system.

Technical Specifications

Core Advantages

Compact and simple mechanical structure, convenient for on-site installation and maintenance.

Short backwashing cycle, large allowable flow rate and minor pressure drop during cleaning.

Three optional control modes: differential pressure, timing and manual operation to match different site management habits.

Support signal transmission to connect with DCS system for centralized workshop monitoring.

High-precision wedge wire screen ensures stable outlet water quality and extremely low blowdown water waste.

Permanent service screen, no frequent filter element replacement, greatly cuts consumable cost.

Robust material configuration extends the overall service life of the filter.

Strong adaptability, works steadily for different raw water sources including river water, underground water and seawater.

Few wearing parts, no regular consumable purchase, low running cost and simple operation.

Non-stop flow during automatic backwash, avoiding production interruption caused by filter maintenance.

Application Scenarios

1. Metallurgy Industry

Continuous casting water, high-pressure dephosphorization water, circulating clean water, cooling water full-flow filtration, side-stream filtration and nozzle protection.

2. Power Industry

Turbine cooling water filtration, wet electrostatic precipitator ash recycling water filtration, dust suppression nozzle protection, cooling tower full flow and side-stream filtration.

3. Agriculture

Sprinkler irrigation and drip irrigation water treatment for farmland, orchards, nurseries, greenhouses, golf courses and landscape parks.

4. General Industrial Fields

Steel, petroleum, chemical, electronic, textile, paper-making, food, pharmaceutical and automobile manufacturing. It is widely used for RO system pre-filtration, white water filtration for paper mills, injection molding machine water loop, pasteurization system, vacuum pump and air compressor water circuit protection, acid pickling water and chilled heating water filtration, municipal water reuse and tertiary sewage treatment.

FAQ

Q1: Do I need to shut down the water system when this self-cleaning filter is washing?

A1: No shutdown is required. The design realizes continuous water supply during the brush cleaning and blowdown process, which is a key advantage for 24h uninterrupted production lines.

Q2: Can the filter screen be replaced if damaged after long running?

A2: The wedge wire screen is a reusable core component. It can be replaced separately if damaged under harsh working conditions, instead of replacing the whole filter housing.

Q3: Which control mode is recommended for most industrial circulating cooling water?

A3: Differential pressure automatic control is the most popular option, it starts cleaning only when the screen is clogged, which saves water and power compared with fixed-time cleaning.

Q4: Is this filter suitable for seawater desalination pre-treatment?

A4: Yes. We can select 316L stainless steel screen and shell plus EPDM seals for anti-corrosion when handling seawater, brackish water and high salinity raw water.

Q5: What is the difference between brush type self-cleaning filter and suction scanner type?

A5: Brush-type model is more cost-effective for particles above 50μm, less sensitive to viscous sludge and easier to maintain on site, which fits most cooling water and irrigation projects.

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