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The Reverse-Rolled Johnson Filter Element features a unique inverted winding process where wedge wire is coiled outwardly around support rods—this reverse-rolled structure ensures winding density uniformity (±0.1 mm gap consistency across the entire surface), preventing local clogging caused by uneven gap distribution. It enhances impurity capture efficiency while simplifying maintenance, making it ideal for high-sediment environments like mining and wastewater treatment. Compared to standard Johnson elements, its outer-facing filtration surface allows impurities to accumulate on the exterior, avoiding internal blockages that are difficult to clean.
Self-Cleaning Design: Outer-narrow-inner-wide gaps prevent particle entrapment, reducing clogging incidents by 60%. In a mining slurry filtration system (solid content 15-20%), cleaning intervals extended from 3 days to 7 days, cutting downtime by 50%. The gap’s V-shaped cross-section (30° included angle) guides impurities to the surface, facilitating easy flushing.
Customizable Dimensions: Diameter ranges from 32.5mm to 60mm with length up to 2000mm, adapting to different filter housings. The 32.5mm diameter option fits laboratory-scale filter units (flow rate 5-10 L/min), while the 60mm diameter suits industrial multi-core filters (100-200 L/min total flow). Length can be tailored to match vertical or horizontal filter vessel heights, with no compromise on filtration uniformity.
Corrosion Resistance: Available in 304, 316L, or 904L stainless steel, resisting pH 2-12 solutions. The 904L variant is suitable for seawater applications (salinity 35‰), with a service life of 8-10 years in offshore wastewater treatment systems. Surface passivation treatment further enhances rust resistance, reducing oxidation in humid environments.
Low Flow Resistance: Smooth surface and 35%+ open area ensure stable flow rates even at high viscosity (e.g., 500 cP syrup). In a food factory’s starch filtration line, it maintained a flow rate of 30 L/min despite starch solution viscosity increasing by 200% during processing.
Mining Industry: Slurry filtration in ball mills and hydrocyclone systems, removing ore particles (10-50μm) to protect pumps and valves. In an iron ore processing plant, it reduced hydrocyclone wear by 35% and improved ore concentrate grade by 2%.
Wastewater Treatment: Solid-liquid separation in industrial effluent processing (e.g., printing and dyeing wastewater with SS 300-500 mg/L). It achieves 98% SS removal efficiency, meeting national discharge standards (SS < 50 mg/L) without additional flocculants.
Food Processing: Starch and syrup filtration, complying with FDA standards. In a corn starch factory, it replaced traditional cloth filters, reducing starch loss by 3% and increasing production capacity by 10% due to lower flow resistance.
Q: How does it differ from standard Johnson elements?
A: Reverse-rolling increases surface impurity capacity by 40%, ideal for high-contaminant loads. Standard elements have inward-facing gaps that trap impurities inside, while reverse-rolled elements collect impurities on the exterior—this makes backwashing more thorough, with impurity removal rate up to 95% vs. 70% for standard elements.
Q: What’s the maximum backwash pressure?
A: It withstands up to 200 psi during cleaning cycles without structural damage. For optimal results, use 150-180 psi backwash pressure with a 2-minute duration—exceeding 200 psi may deform the support rods, affecting gap consistency.
Q: Is it compatible with diatomaceous earth filtration?
A: Yes, its smooth surface maintains stable pre-coat layers, avoiding cracks. The diatomaceous earth layer (thickness 1-2 mm) adheres evenly to the reverse-rolled surface, improving fine particle (1-5μm) removal efficiency to 99.9%.
Q: Can it be used in high-temperature applications?
A: Yes, 316L stainless steel variants operate stably at temperatures up to 302°F (150°C), suitable for hot wastewater filtration in textile factories. For temperatures exceeding 302°F, Inconel 625 material is available, with a maximum operating temperature of 1200°F (649°C).
The Reverse-Rolled Johnson Filter Element features a unique inverted winding process where wedge wire is coiled outwardly around support rods—this reverse-rolled structure ensures winding density uniformity (±0.1 mm gap consistency across the entire surface), preventing local clogging caused by uneven gap distribution. It enhances impurity capture efficiency while simplifying maintenance, making it ideal for high-sediment environments like mining and wastewater treatment. Compared to standard Johnson elements, its outer-facing filtration surface allows impurities to accumulate on the exterior, avoiding internal blockages that are difficult to clean.
Self-Cleaning Design: Outer-narrow-inner-wide gaps prevent particle entrapment, reducing clogging incidents by 60%. In a mining slurry filtration system (solid content 15-20%), cleaning intervals extended from 3 days to 7 days, cutting downtime by 50%. The gap’s V-shaped cross-section (30° included angle) guides impurities to the surface, facilitating easy flushing.
Customizable Dimensions: Diameter ranges from 32.5mm to 60mm with length up to 2000mm, adapting to different filter housings. The 32.5mm diameter option fits laboratory-scale filter units (flow rate 5-10 L/min), while the 60mm diameter suits industrial multi-core filters (100-200 L/min total flow). Length can be tailored to match vertical or horizontal filter vessel heights, with no compromise on filtration uniformity.
Corrosion Resistance: Available in 304, 316L, or 904L stainless steel, resisting pH 2-12 solutions. The 904L variant is suitable for seawater applications (salinity 35‰), with a service life of 8-10 years in offshore wastewater treatment systems. Surface passivation treatment further enhances rust resistance, reducing oxidation in humid environments.
Low Flow Resistance: Smooth surface and 35%+ open area ensure stable flow rates even at high viscosity (e.g., 500 cP syrup). In a food factory’s starch filtration line, it maintained a flow rate of 30 L/min despite starch solution viscosity increasing by 200% during processing.
Mining Industry: Slurry filtration in ball mills and hydrocyclone systems, removing ore particles (10-50μm) to protect pumps and valves. In an iron ore processing plant, it reduced hydrocyclone wear by 35% and improved ore concentrate grade by 2%.
Wastewater Treatment: Solid-liquid separation in industrial effluent processing (e.g., printing and dyeing wastewater with SS 300-500 mg/L). It achieves 98% SS removal efficiency, meeting national discharge standards (SS < 50 mg/L) without additional flocculants.
Food Processing: Starch and syrup filtration, complying with FDA standards. In a corn starch factory, it replaced traditional cloth filters, reducing starch loss by 3% and increasing production capacity by 10% due to lower flow resistance.
Q: How does it differ from standard Johnson elements?
A: Reverse-rolling increases surface impurity capacity by 40%, ideal for high-contaminant loads. Standard elements have inward-facing gaps that trap impurities inside, while reverse-rolled elements collect impurities on the exterior—this makes backwashing more thorough, with impurity removal rate up to 95% vs. 70% for standard elements.
Q: What’s the maximum backwash pressure?
A: It withstands up to 200 psi during cleaning cycles without structural damage. For optimal results, use 150-180 psi backwash pressure with a 2-minute duration—exceeding 200 psi may deform the support rods, affecting gap consistency.
Q: Is it compatible with diatomaceous earth filtration?
A: Yes, its smooth surface maintains stable pre-coat layers, avoiding cracks. The diatomaceous earth layer (thickness 1-2 mm) adheres evenly to the reverse-rolled surface, improving fine particle (1-5μm) removal efficiency to 99.9%.
Q: Can it be used in high-temperature applications?
A: Yes, 316L stainless steel variants operate stably at temperatures up to 302°F (150°C), suitable for hot wastewater filtration in textile factories. For temperatures exceeding 302°F, Inconel 625 material is available, with a maximum operating temperature of 1200°F (649°C).
