Dust in the supply air settles on sensitive equipment, clogs cooling circuits and wears out fans and electronics. Standard off-the-shelf filter boxes rarely fit an existing duct or cabinet opening, and filters that are hard to reach tend to be changed too late. The customer needed a compact filter unit that mounts straight into the air intake, stops dust effectively and allows a quick filter change without dismantling the ductwork.

Filter-Technics designed and built a three-stage filter housing in-house. The powder-coated steel casing has flanges on both sides with pre-drilled bolt holes, so it mounts directly between the existing duct sections. A mesh pre-filter captures coarse particles first. A standard panel filter from our range follows as the intermediate stage, and a pleated fine filter in a stainless steel frame holds back the finest dust. Spreading the load over three stages keeps the pressure drop low and extends the lifetime of the fine filter. All elements slide into guide rails and are reached through a side access door with a full rubber seal and quick-release latches, so the housing stays airtight during operation and a filter change takes only minutes. Airflow direction is clearly marked on the elements to prevent incorrect installation.

• Custom powder-coated steel filter housing with flanged connections
• Mesh pre-filter for coarse particles
• Standard panel filter as intermediate stage
• Pleated fine filter in stainless steel frame
• Side access door with rubber seal and quick-release latches

Clean intake air, better protection of the equipment behind the filter and less maintenance downtime. The intermediate panel filter is a standard, low-cost replacement part, so the more expensive fine filter needs changing far less often.

Contamination is the number one cause of hydraulic failures. Particles and water in the oil wear out pumps, valves and cylinders and lead to unplanned downtime. New oil is often not clean enough straight from the drum, and many hydraulic systems have no fine filtration on board. Maintenance teams need a way to clean oil on different machines, fill reservoirs with filtered oil and flush systems, without installing extra filters on every machine.

Filter-Technics designs and builds mobile filtration units in-house, tailored to each application. Each unit is mounted on a stainless steel frame, trolley or hand truck with a drip tray to keep the work area clean. An electric or compressed-air driven pump circulates the oil through a filter housing or spin-on filter elements, removing particles and water in bypass while the machine keeps running. Suction and pressure hoses with quick couplings make connection fast, and pressure gauges show when the element needs replacing. Electric units come with a control box including a main switch, emergency stop and CEE plug. Air-driven units get a filter-regulator and lubricator to run from the plant's compressed air network. Where oil temperature is an issue, we also build compact cooling skids with a plate heat exchanger and thermostatic valve.

• Stainless steel frames, trolleys and hand trucks with drip tray
• Electric and pneumatic pump units
• Filter housings and spin-on filter elements
• Plate heat exchanger skids for oil cooling
• Quick couplings, strainers, gauges and control boxes

Cleaner oil, longer lifetime of hydraulic components and fewer breakdowns. One mobile unit serves several machines, so customers get fine filtration where they need it without investing in a fixed installation on each system.

This company reuses process water in its brick and ceramic production. Reclaimed water carries clay fines and solids that blind a conventional filter element quickly, and every manual clean interrupts the recuperation circuit. The duty called for 100 µm filtration at 50 m³/h, running continuously with as little attention as possible.

DELTA-STRAIN 240-S/L self-cleaning filters with mechanical scraper-blade cleaning, in inline design: inlet and outlet sit at the same height, so the units drop straight into the pipe run and the sump demounts downwards. Product-contacted parts are stainless steel 1.4571, 1.4404, 1.4435 and 1.4310, pickled and passivated, sealed with an FPM O-ring and an aramid-with-PTFE stuffing box on the shaft. Each filter closes with a DELTA quick-action spindle cover closure for fast access to the element, and is driven by a 400 V worm geared motor in IP 65, efficiency class IE3. Filter-Technics mounted the filters in parallel on one frame, sharing DN100 inlet and outlet headers and a common DN50 drain collector. The units are designed to AD2000 and PED 2014/68/EU, category I, module A, and carry CE marking.

• DELTA-STRAIN 240-S/L self-cleaning scraper filters, inline design
• 50 m³/h · 100 µm · PS 0/+10 bar · TS −10/+80 °C · volume 8.7 l · ≈ 43 kg empty
• DN50 PN16 flanges to EN 1092-1 · face-to-face 420 mm · 1" BSP drain
• Worm geared motor 400 V / 3 ph / 50 Hz / 180 W · IP 65 · IE3
• DELTA-SNSB/15WL self-re-stressing gland · DELTA quick-action cover closure
• Frame with DN100 in/outlet headers and DN50 drain collector · RAL 6011
• AD2000 and PED 2014/68/EU, cat. I, module A, CE-marked

Reclaimed water is filtered continuously at 100 µm while the scrapers keep the element clear, so the recuperation circuit stays in service instead of stopping for cleaning. The quick-action cover closure keeps inspection quick when the element does need checking.

A filter vessel in refining and chemicals service usually faces two kinds of attack at once: a chemically aggressive medium, and the abrasive particles the filter is there to remove. An ordinary paint system is neither diffusion-tight nor hard enough to survive that combination, and lining the vessel is not the same job as painting it.

Filter-Technics supplied basket filters lined internally with CP Phenolics® 210 Red Series, a phenolic stoving coating with very high wear resistance. After blasting, the coating is applied and then baked onto the metal in a polymerisation oven, built up as a multi-layer system averaging 180 µm. The cured film is diffusion-tight and cross-linked, giving very high chemical resistance, so the whole surface facing the process is protected by a single engineered coating system rather than by the vessel material alone.

• Basket filter vessels
• CP Phenolics® 210 Red Series internal stoving coating
• Multi-layer system, average 180 µm thickness
• Blasted, coated and oven-cured (polymerised)
• Diffusion-tight, cross-linked film with very high chemical and wear resistance

A filter housing that combines the chemical resistance of a lining with the wear resistance of a hard coating, applied and cured under controlled workshop conditions rather than brushed on site.

Zinc smelting depends on a continuous supply of clean cooling water. Suspended solids foul heat exchangers, and a strainer that has to be isolated and cleaned by hand is awkward work in a plant that runs around the clock. The plant needed filtration down to 50 µm at up to 300 m³/h that would look after itself.

Filter-Technics supplied a fully automatic self-cleaning basket filter, model M308P with a stainless steel 316 filter housing, a filter area of 3,060 cm² and a maximum pressure drop of 0.20 bar. The unit backflushes itself on differential pressure through 24 VDC 3/2 and 5/2 valves running on compressed air, discharging through a DN80 flush outlet, and a DN100 inspection port gives access to the element. The complete control unit came with it: an enclosure holding a differential-pressure controller adjustable from 0.2 to 0.8 bar, a 230 VAC to 24 V transformer, and timers for flush time, delay times, alarm and a periodic flush anywhere from 1 to 24 hours. LED indication shows flush, alarm, power and running, and a push button triggers a manual flush at any moment.

• M308P fully automatic self-cleaning basket filter, 8", SS316
• 300 m³/h · 50 µm · filter area 3,060 cm² · Δp max 0.20 bar
• DN200/PN10 inlet and outlet · DN80 flush outlet · DN100 inspection port
• Control cabinet with Δp controller 0.2–0.8 bar and 24 VDC 3/2 and 5/2 valves
• Timers for flush time, delay, alarm and periodic flush 1–24 h · LED status · manual flush button
• Supply: 230 VAC and compressed air

Cooling water is filtered continuously and the filter cleans itself on differential pressure or on a set interval, so the strainer no longer has to be opened as part of routine maintenance. Operators keep direct control through the LED panel and the manual flush button.

This process plant engineers and builds process plants for the edible oil, oleochemical and biofuel industries. For a plant destined for South Korea, the process line needed self-cleaning filtration rated from full vacuum up to 11 bar at 90 °C, and it had to arrive with a documentation package combining ASME Section VIII Division 1 with Korean KOSHA requirements. The end client also excluded any material of Chinese or Indian origin and required independent PMI verification of the alloys used.

Filter-Technics supplied four DELTA-STRAIN 960-S/L-S self-cleaning filters with mechanical scraper-blade cleaning. All product-contacted parts are duplex stainless steel 1.4462, pickled and passivated. The two-piece housing lets the cover, motor and gear unit be lifted off upwards, clear of the filter sump. Design, calculation, fabrication and testing follow ASME VIII Div. 1, 2023 edition, with minimum spot radiography on every welded seam, and a PMI gun test was carried out by an independent certified testing laboratory. The complete sealing package is rated for the full 90 °C design temperature: an aramid-with-PTFE stuffing box, PTFE and carbon-filled PTFE bearings, FPM O-rings and epoxy/fiberglass scraper blades. The outside is coated in the client’s own N10 system in RAL 7038, with a 75 mm insulation collar and an earthing lug.

• 4 × DELTA-STRAIN 960-S/L-S self-cleaning scraper filters
• Duplex stainless steel 1.4462 (318LN), pickled and passivated · no Chinese or Indian material
• PS full vacuum / +11 bar · TS −18 °C / +90 °C · volume ≈ 66 l · ≈ 160 kg empty
• 4" 150 lbs ASME B16.5 SORF inlet and outlet · 2" drain · 1½" 300 lbs Δp connections
• DELTA-SNSB/30WL self-re-stressing gland unit
• ASME VIII Div. 1 (2023 ed.), KOSHA, third-party PMI testing

The four filters left the workshop with a full ASME and KOSHA documentation package and an independent PMI verification of the alloys, vacuum-wrapped and crated for shipment. In service, the scraper blades keep the element clear, so the process line keeps running without the housing being opened.

This service center in Maastricht manufactures welded steel tubes and profiles. These processes require substantial amounts of cooling water, drawn from the Juliana Canal through a dedicated pipeline.

A perforated plate provides pre-filtration. Five self-cleaning DFA71 scraper filters were installed in parallel for the main filtration stage.

• 5 × DFA71 self-cleaning scraper filters
• Perforated plate for pre-filtration

This manufacturer of titanium dioxide pigments for industries including paint production, draws large volumes of surface water from rivers and canals for its operations. This water contains considerable organic debris, including leaves, fibers, and sludge, causing conventional filters to clog quickly and require intensive manual maintenance.

Filter-Technics supplied a fully automated, self-cleaning scraper filter, model HSBIO-W-16/40-E-200-BN50, manufactured entirely from 316L stainless steel. A motor-driven scraper continuously cleans the filter element based on differential pressure, ensuring uninterrupted filtration at 200 µm without shutting down the system.

• HSBIO-W-16/40-E-200-BN50 self-cleaning scraper filter
• 316L stainless steel construction · 400 m³/h · 200 µm · DN400
• Automatic, differential-pressure-controlled cleaning

Continuous water intake with minimal manual maintenance. Removed contaminants are discharged automatically instead of being extracted from the filter by hand.

The train’s roof-mounted traction transformer must remain completely free from contamination. Its cooling air intake must prevent dust, dirt, rain, and snow from entering—a conventional grille or standard filter cannot provide sufficient protection.

Filter-Technics designed a smart filter panel with specially shaped louvers. It blocks contaminants while its carefully engineered louver design provides simultaneous protection against rain and snow. The complete module was engineered and manufactured in-house, combining a stainless steel structure, a filter element, and a perforated cover plate.

• Smart louvered filter panel
• Rain- and snow-resistant design
• In-house engineering and stainless steel fabrication

The transformer remains protected against contamination and moisture, with a reliable cooling air supply in all weather conditions.