Single Self-Cleaning Water Filtration System

Single water filtration encompasses systems that work with one self-cleaning filtration mechanism. They are straightforward in design, cost-efficient and effective for most standard filtration applications. Whether it concerns separating coarse solids, protecting pumps or continuously filtering process water — single self-cleaning filtration systems offer a reliable and low-maintenance solution.

Dutch Flow Control offers six single self-cleaning water filtration systems, each with its own operating principle and area of application.

Self-Cleaning Screen Bend Filter

The screen bend is a fully static filter system with no moving parts, self-cleaning in the range of 0.25 to 2 mm. The water flows across a curved surface positioned at an angle of approximately 60 degrees, and the separation of solids and liquid takes place by skimming. Solid particles such as fibres, granules and organic material are retained on the screen surface and slide by gravity into a collection trough.

Due to the absence of mechanical components, the screen bend requires virtually no maintenance and the risk of breakdowns is minimal. The unit is available in 304 or 316 stainless steel. For heavier or sticky material, optional additions are available such as a vibration mechanism, spray nozzles or brushes.

Applications screen bend

Wastewater
Process water
Systems with a high contamination load and gravity feed

Features screen bend

No moving parts — no wear, no breakdowns
Slot widths from 0.25 mm to 2 mm
Gravity-driven — no pumps or energy required
Optionally expandable with spray nozzles, brushes or collection trough

Self-Cleaning Drum Filter (RDF)

The drum filter is a mechanical, continuously rotating filter system for separating suspended and floating solids from water and process liquids. The self-cleaning drum filter has a filtration range of 0.25 to 4 mm. The water flows through a slowly rotating drum fitted with wedge wire. Solids are retained on the outer surface of the drum and are continuously removed by a fixed scraper.

Internal spray nozzles (4–6 bar) keep the screen slots free from blockages during operation. The system operates fully automatically and is suitable for continuous, uninterrupted use. Capacity ranges from approximately 25 m³/hr to 1,770 m³/hr.

Applications drum filter

Wastewater and process water treatment
Sewage water treatment
Paper and textile production
Plastics and (petro)chemical processing
Meat and vegetable processing

Features drum filter

Fully automatic and suitable for continuous use
Low investment costs and minimal maintenance
Low energy consumption
High flow rate with high contamination load possible
Standard configuration for contamination loads up to approximately 200 mg/l
Higher contamination loads are possible
Manufactured in stainless steel

Self-Cleaning ACF Coarse Filter

The ACF coarse filter is a fully automatic system for removing coarse particles from process water. This self-cleaning coarse filter has a filtration range of 0.1 to 5 mm and uses a wedge wire filter element.

The system cleans itself automatically via a mechanical scraper or a backflush mechanism. As soon as contamination accumulates and the pressure differential reaches a preset threshold, a cleaning cycle of just six seconds is initiated — without interrupting the primary process. The construction is manufactured from 316L stainless steel and is highly suitable for industrial process conditions.

Applications ACF coarse filter

Protection of pumps, heat exchangers and pipework
Pre-filtration ahead of fine filters or membrane systems
Cooling water treatment
Wash water for vegetables, potatoes or flower bulbs
Granulate filtration
Industrial process water
Intake of surface water and wastewater

Features ACF coarse filter

Automatic cleaning in 6 seconds
Low pressure drop and low maintenance
Capacities from 25 to 650 m³/hr
Corrosion-resistant 316L stainless steel
Can be cleaned with mild acids to counter the build-up of salts, scale and organic material

SCF — Automatic Self-Cleaning Filter

The SCF filter is designed for applications that require continuous and uninterrupted filtration. This self-cleaning filter has a filtration range of 15 micron to 3000 micron. The liquid flows from the inside to the outside through a cylindrical filter element. The system continuously monitors the pressure differential across the filter element. As soon as a preset threshold is reached, a short cleaning cycle starts automatically.

During this cycle, internal spray nozzles clean the filter element through a combined rotating and axial movement. Flow is maintained uninterrupted throughout the cleaning process. The SCF filter combines high capacity with a compact design. The stainless steel housing guarantees a long service life and minimal maintenance.

Applications SCF

Process monitoring for process water and cooling water
Spray nozzle protection
Industrial water treatment and inline filtration for 2" to 16" pipelines
Protection of downstream equipment

Features SCF

Fully automatic operation without process interruption
Filtration range from 15 to 3,000 micron
Robust stainless steel housing
Compact dimensions, suitable for inline installation in 2" to 16" pipelines
Fast return on investment due to low operational costs

HL-SCF — Self-Cleaning Water Filter for High Contamination Loads

The HL-SCF filter is a self-cleaning filter system that is a variant of the SCF filter, developed specifically for processes with very high concentrations of solid contaminants. The key difference between these self-cleaning filters lies in the flushing: the HL-SCF filter has continuous flushing ahead of the self-cleaning filter, whereas an SCF filter flushes intermittently on pressure differential.

The HL-SCF filter has a filtration range of 35 to 400 micron and is an intelligent cleaning system that ensures the filter element is continuously flushed every 5 seconds by rotating spray nozzles, without interrupting the filtration process. This makes full (100%) cleaning of the filter element possible even after millions of flush cycles.

Applications HL-SCF

Reuse of wastewater and irrigation water
Pre-filtration of sand filters
Cooling water inlet filtration
Filtration for recirculation systems with high contamination loads
Steel, paper and plastics industries
Sugar production
Seawater filtration

Features HL-SCF

Continuous 100% cleaning of the filter element without process interruption
Cleaning cycle of just 3–5 seconds
Resistant to millions of cleaning cycles
Suitable for low operating pressures
Fully automatic — no operator intervention required

MFF — Self-Cleaning 3 Micron Filtration

The MFF Microfilter is a self-cleaning filter system for the removal of fine particles, with a filtration range down to 0.5 micron and most applications in the 3 micron filtration range. The system uses rotating filter drums fitted with cassettes of multi-layer polyester fibres.

When the pressure differential across the filter element reaches a preset threshold, a high-pressure flush cycle starts automatically. Water jets clean the polyester fibres effectively and thoroughly, without the need for consumable filter material or replacement media. After the brief flush cycle, the system resumes normal filtration.

Thanks to the modular construction of the MFF, the system can easily be scaled up to higher capacities. The design focuses on fast and straightforward maintenance with minimal downtime.

Applications MFF

Pre-filtration of RO membrane systems (reverse osmosis)
Removal of insoluble heavy metals from industrial wastewater
Removal of cysts and parasites (such as cryptosporidium) from drinking water and fish farm water
Removal of legionella in cooling water and shower systems
Cleaning of spray systems and wash installations

Features MFF

Many 3 micron applications delivered to full customer satisfaction over the past 15 years
Multi-layer polyester fibres
No consumable filter material — no replacement costs
Modular construction for easy capacity expansion
Fast maintenance with minimal downtime
Fully automatic cleaning cycle

Downloads

Download our brochures, datasheets and technical documentation for detailed specifications, performance data and application information. Additional data or project-specific information is available on request — please feel free to contact us for further details.

Need help choosing the right product?

Which single system is the best fit for your application, or is a combined system perhaps a better solution? Our specialists are happy to advise you based on flow rate, contamination load, slot width and process conditions. Contact us without any obligation.

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