Inch Diameter Filter Cartridge for Ultrafiltration Pre-treatment

6 Inch Diameter Filter Cartridge for Ultrafiltration Pre-treatment

This article introduces the 6 inch diameter filter cartridge, an extra-wide high flow filter designed for heavy-duty ultrafiltration pretreatment in industrial water systems. A liquid filter built with deep pleated polypropylene media, it delivers maximized filtration area and superior contaminant holding capacity to safeguard downstream UF membrane assemblies. Our 6 inch diameter filter cartridge can replace Equivalent ALN01-60B High Flow Cartridge for Ultrafiltration, widely used in seawater desalination, power plant condensate polishing and large-scale industrial wastewater reuse projects. Its ultra-wide outer diameter drastically cuts down the total quantity of filter elements, minimizing installation footprint and routine maintenance work for large-capacity water treatment plants.

1. Product Introduction

The 6 inch diameter filter cartridge is an extra-wide pleated high flow filter element engineered to serve as security pre-filter for heavy-duty ultrafiltration water treatment equipment. Compared with conventional 2.5-inch and 4.5-inch filter cartridges, the 6 inch diameter filter cartridge features the largest radial filtration area among high flow filter series, supporting ultra-high single-element throughput. It is available in 40-inch and 60-inch lengths, tailored for large UF skids, full-scale municipal water plants and massive desalination pretreatment systems.

This filter cartridge is fully interchangeable with High Flow Cartridge Filter Element for Ultrafiltration Pre-treatment, and complies with the sealing and interface standards of Ultipleat High Flow Filters for Ultrafiltration Pre-treatment. Installed directly before ultrafiltration membrane racks, the 6 inch diameter filter cartridge traps sediment, rust particles, algae, fine silt and organic debris inside raw inlet water. Without reliable prefiltration protection, hard particulate impurities will scratch UF membrane surfaces, clog membrane pores and trigger irreversible membrane fouling. Severe fouling continuously reduces membrane permeate flux, increases chemical cleaning cycles and shortens the working lifespan of costly ultrafiltration membrane modules. For customers searching for alternative UF prefiltration options, Pre-filtration Filter Cartridge for Industrial Ultrafiltration Systems is another trustworthy product for reference.

The 6 inch diameter filter cartridge is constructed with reinforced polypropylene inner core and outer support cage, capable of enduring fluctuating differential pressure under long-term continuous running conditions. Gradient-density polypropylene pleated filter media achieves high dirt holding capacity while keeping low initial pressure drop. Multiple micron grades ranging from 1μm to 100μm can be selected to adapt to different raw water turbidity and impurity characteristics. EPDM, silicone and Viton sealing gaskets are optional to fit different liquid temperature and chemical compatibility requirements. Thanks to its 6-inch extra-wide outer diameter, one single cartridge can handle far larger water volume than standard narrow filter cartridges, greatly reducing the number of filter housings required for the same treatment capacity.

2. Working Principle

The 6 inch diameter filter cartridge operates on pleated depth filtration principle, combining surface screening effect and deep adsorption interception. Raw water flows radially outward-inward from the outer pleated surface of the 6-inch wide body, penetrates multi-layer graded polypropylene media, purified liquid flows inward through the central inner core and exits from the end port of the filter cartridge.

Large contaminants including sand grains, rust debris and plankton are captured on the outer pleated layer. Fine colloids and tiny suspended particles are intercepted inside the gradient filter layers. The gradient density design enables pollutants to distribute evenly inside filter media instead of accumulating only on the outermost surface. The unique 6-inch large diameter creates a substantially expanded pleat area, significantly boosting dirt holding capacity and extending filter service cycle, avoiding rapid pressure rise after short operation time.

Within the complete ultrafiltration pretreatment workflow, the 6 inch diameter filter cartridge acts as the primary protective barrier for ultrafiltration membranes. It stabilizes the Silt Density Index (SDI) of inlet water and cuts down particulate load entering UF membrane modules. When inlet and outlet differential pressure hits the preset threshold, filter cartridge replacement is required. Its extra-wide body design reduces cartridge quantity, simplifying spare part inventory management and filter replacement work for maintenance teams.

3. Technical Parameters

All parameters are tested under standard laboratory environments. Actual flow rate and dirt holding capacity will be affected by raw water turbidity, liquid temperature and impurity concentration. Our engineering team can customize micron rating, end cap connection and gasket material according to your on-site ultrafiltration project requirements.

4. Quality Assurance

All 6 inch diameter filter cartridge products are manufactured under ISO9001 quality management system. Raw filter media will be strictly inspected before production to check pinholes, uneven thickness and material defects. Every finished filter cartridge will go through bubble point integrity test, pressure resistance test and full visual inspection before shipment.

Automated pleating equipment ensures consistent pleat density for each wide-diameter filter element, guaranteeing stable flow performance and dirt holding capacity. Reinforced inner core prevents media collapse under variable operating pressure, which is a common failure mode of low-cost filter cartridges. All filter cartridges are cleaned and packed in dust-free workshop to avoid secondary contamination before delivery.

We provide batch inspection reports for each order. Third-party material testing can be arranged upon customer request. Our replacement filter elements deliver equivalent filtration performance as famous brand cartridges, with better overall cost performance. Our products are fully tested to prevent media shedding, which is essential to avoid secondary contamination to ultrafiltration membrane modules.

5. Application Fields

5.1 Large Scale Ultrafiltration Pretreatment

This is the core application. The 6 inch diameter filter cartridge serves as the security filter before ultrafiltration membrane racks in municipal water treatment and large industrial water reuse projects. It removes particles and colloids, stabilizes inlet SDI, protects UF membranes and reduces chemical cleaning frequency.

5.2 Seawater & Brackish Water Desalination

In large desalination plants, this wide diameter filter cartridge filters raw seawater, intercepts sea sand, algae and suspended solids, to protect ultrafiltration and reverse osmosis membranes in the pretreatment skid.

5.3 Power Plant Condensate Water Treatment

Power plants use the 6 inch diameter filter cartridge for condensate polishing systems, removing iron oxide and particulate impurities, protecting boiler and downstream membrane equipment.

5.4 Large Industrial Wastewater Reuse

For chemical, petrochemical, food and beverage large-volume wastewater recycling projects, it works as the pre-filter for ultrafiltration systems, lowering pollutant load and improving system water recovery rate.

5.5 Heavy-Duty Raw Water Purification

Large municipal raw water purification plants adopt this filter cartridge in UF water purification process, removing suspended impurities in river or lake raw water to extend ultrafiltration membrane service life.

6. FAQ (6 Questions)

Q1: What function does the 6 inch diameter filter cartridge serve in ultrafiltration equipment?

A: It acts as the key security pre-filter for heavy-duty ultrafiltration systems. The 6-inch extra-wide body provides ultra-large filtration area, intercepting suspended particles, silt and colloids, reducing SDI value of incoming water, preventing fouling and mechanical scratch damage to ultrafiltration membranes, and extending the service life of UF modules.

Q2: What advantages does the 6 inch diameter filter cartridge have compared with 4.5 inch filter cartridges?

A: The 6-inch outer diameter further expands the effective filtration area, achieving higher single-element flow rate and larger dirt holding capacity. Under the same water treatment capacity, fewer filter cartridges and filter housings are needed, saving equipment investment and cutting maintenance labor cost.

Q3: Can the 6 inch diameter filter cartridge run continuously in seawater desalination pretreatment?

A: Yes. Polypropylene media has good salt tolerance. We can select matched sealing gaskets according to your seawater salinity and temperature. You can send your water quality report for our professional compatibility assessment.

Q4: Which micron rating should I choose for ultrafiltration prefiltration?

A: 5μm or 10μm are the most popular options for ultrafiltration pretreatment. If raw water contains a large amount of coarse sediment, 20μm or 40μm is recommended. Our technical team will provide customized suggestions based on your water test data.

Q5: When should I replace the 6 inch diameter filter cartridge?

A: Replacement cycle depends on raw water impurity load. Normally, replace the cartridge when the inlet-outlet differential pressure reaches 2.5 bar. In general industrial water projects, its service life ranges from 1 to 3 months.

Q6: Can you customize end cap styles and gaskets of the 6 inch diameter filter cartridge for our existing filter housing?

A: Yes. We support custom end cap connection styles and multiple gasket materials including EPDM, silicone and Viton to fit your existing filter housing and working medium.

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