Hewitech GmbH & Co. KG
About
Hewitech is a family-owned German manufacturer operating from Billerbeck, North Rhine-Westphalia, with over three decades of experience producing plastic internals for cooling tower and wastewater treatment systems. The company runs fully automated production using proprietary machinery and patented technologies, processing polypropylene, PVC, and fluoropolymers through extrusion and injection molding. Hewitech serves six application sectors: cooling towers, rainwater management, water purification, mass transfer, exhaust air treatment, and agriculture. In cooling towers, the company offers trickle grids (NC 20, VNC 20, VC 20, VC 25, AS 500, NB 25, and the new VFG 20), cross-fluted film fills (CF-12, CF-19, CF-20, CF-27), vertical film fills (VF-20, VF-23, VF-50, VF-18, OS 21, VFH-20, VFC-20), drift eliminators (DE 125, DE 250, DEP 156, DE 177, DE 188), air inlet elements (AI 63), suspended grids (HG 610, HG 705), and distribution nozzles (H3, Hewi, SPLASHBOX). Their rainwater division produces the VARIOBOX modular infiltration and retention system in multiple configurations (standard, Green, SP, 170 mm tunnel, and drainage variants), CONTROLBOX inspection chambers (400, 600, 600/400), TREE-BOX urban tree pit systems, filter cassettes, sports floor drainage, and turf drainage elements. For water purification, Hewitech manufactures trickling filter media, lamella clarifiers (LS 50, LS 84, LS-60), and water distribution systems. Agricultural products include AK 100 and AK 150 COOLPAD evaporative cooling pads and Bio trickle grid Type 20 for greenhouse and livestock ventilation. The exhaust air line supplies bio-trickling filter media and gas purification components. Hewitech's in-house machine engineering capability allows custom production from raw polymer to finished component, serving municipal utilities, industrial cooling operators, and agricultural facilities across international markets.
Key Products
A modular stackable plastic stormwater infiltration and retention tank system available in multiple configurations for subsurface rainwater management.
Inspection and control boxes for monitoring and maintaining subsurface stormwater infiltration installations.
A tree pit stormwater integration system that combines urban tree planting with rainwater infiltration and root management.
Stormwater filtration units that remove pollutants and sediments from rainwater before infiltration or discharge.
Subsurface drainage components and sports field drainage systems for turf and athletic surface water management.
Cross-fluted plastic film fill packs for cooling towers, trickling filters, and mass transfer applications that maximize surface area for heat and mass transfer.
Trickle grid media for cooling towers, trickling filters, and biological treatment processes providing distributed water flow and biological attachment surface.
Vertical flow film fill packs for cooling tower and water treatment applications with optimized heat transfer geometry.
Drift and droplet eliminator elements that capture water droplets from air streams in cooling towers and exhaust systems, reducing water loss and emissions.
Lamella settlers and separators for sedimentation in water and wastewater treatment, using inclined plate technology for efficient solid-liquid separation in compact footprints.
Air inlet louvers for cooling towers that direct airflow while preventing debris entry and splash-out.
Water distribution nozzles and splash boxes for even water distribution across cooling tower fill packs and trickling filter surfaces.
Evaporative cooling pads for agricultural greenhouse and livestock facility ventilation, providing temperature reduction through evaporative cooling.
Biological trickle grid media for agricultural and exhaust air biofiltration applications supporting microbial growth for odor and pollutant removal.
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