Hebei Slot Filter Technology Co., Ltd.
About
Hebei Slot Filter Technology Co., Ltd. operates under the Johnsonslot brand from Anping County, Hebei Province, China, manufacturing stainless steel wedge wire screening and filtration products with over 15 years of production experience and ISO 9001/SGS certification. The company exports to more than 70 countries and produces wedge wire elements with slot openings from 0.02 mm, achieving filtration efficiencies above 95%. Their core capability is precision V-wire forming for cylindrical, flat, and conical filter profiles using SS304, SS316, and SS316L alloys. The product range spans Johnson screen tubes and conical wedge wire filter elements for industrial separation and well screening, sieve bend screens and pressure arc screens for dewatering and classification, and screen baskets including EB drilled and centrifuge variants for pressure filtration and centrifuge duty. Water treatment applications are served through wedge wire filter nozzles for sand filter underdrains, resin traps and lateral assemblies for ion exchange systems, and Coanda effect intake screens for passive surface water abstraction that excludes debris and aquatic organisms without moving parts. The company also produces a self-cleaning filter line in scraping, Bernoulli, backwash, modular, and scanning configurations, plus bag filters, basket filters, and automatic candle filter systems. Advanced media include sintered metal fiber felt cartridges, sintered wire mesh filters, and titanium porous elements for high-temperature and corrosive environments.
Key Products
Cylindrical filter elements made from V-shaped wedge wire with slot openings 0.02-5mm for solid-liquid separation in industrial filtration, well screening, and centrifuge applications.
Flat wedge wire panels for screening, dewatering, and classification in water treatment, mining, and pulp and paper industries.
Curved wedge wire screens including centrifuge bend screens and pressure arc screens for dewatering, classification, and solid-liquid separation.
Wedge wire screen baskets including EB drilled and centrifuge screen baskets for separation and dewatering in pressure filters, centrifuges, and straining applications.
Stainless steel wedge wire filter nozzles for sand filter underdrain systems in water treatment, with slot openings from 0.1mm for even distribution and backwash.
Wedge wire lateral assemblies and resin traps for capturing ion exchange resin beads during backwash in demineralization and softening systems.
Passive water intake screens using the Coanda effect for surface water abstraction from rivers and lakes, excluding debris and fish without mechanical moving parts.
Automatic self-cleaning filter systems in scraping, Bernoulli, backwash, modular, and scanning configurations for continuous filtration without process downtime.
Stainless steel bag filter housings for batch or continuous filtration of process water and wastewater using disposable filter bags.
Stainless steel basket filter housings for coarse to fine straining of water and process fluids with reusable mesh baskets.
Fully automated candle filter systems for high-efficiency fine filtration with self-cleaning backwash capability.
Sintered metal fiber felt, sintered wire mesh, and titanium porous filter cartridges for high-temperature and corrosive environment filtration.
PP pleated, melt-blown, PTFE, string wound, and stainless steel filter cartridges and baskets for various water and process filtration duties.
Polyurethane screen panels and flip-flow screens for mining, coal washing, and dewatering applications with high abrasion resistance.
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