INDUSTRY APPLICATIONS

Delivers consistent performance&absolute safety in extreme process conditions,backed by our core capabilities:

>>>Features proprietary R&D and manufacturing of microfiltration membranes.

>>>Utilizes raw materials that comply with FDA and USP Class VI standards.

>>>Operates under a dual-certified ISO 9001&ISO 13485 quality management system.

Membrane Filter Cartridge:Absolute Protection for Critical Process Streams

In the world of high-stakes manufacturing, "filtration" is synonymous with "security." Whether you are ensuring the sterility of an injectable drug, protecting a fermentation tank from contamination, or stabilizing the taste of a fine wine, the filter cartridge is your final line of defense.

At LOONG FILTRATION, we engineer Membrane Filter Cartridges that provide absolute-rated removal efficiency. Manufactured in our ISO-certified 100,000-level cleanrooms, our products bridge the gap between rigorous global compliance standards and cost-effective manufacturing. We don't just sell filters; we deliver the Certificate of Analysis (COA) and validation confidence you need to pass your audits.

Engineered by Application of Membrane Filter Cartridge

We understand that a filter for solvents requires different chemistry than a filter for vaccines. Explore our specialized solutions:

1. The Biopharma Guardian: Polyethersulfone (PES)

• The Challenge: Terminal sterilization requires absolute bacterial retention without binding valuable proteins.

• The LOONG Solution: Our asymmetric PES Membrane Cartridges offer high flow rates and ultra-low protein binding.

• Key Specs: 0.1μm / 0.2μm / 0.45μm. Validated for Brevundimonas diminuta retention (ASTM F838).

• Use Cases: WFI systems, vaccines, ophthalmics, and biological buffers.

  
  

2. The Chemical Shield: Polytetrafluoroethylene (PTFE)

• The Challenge: Harsh acids, aggressive solvents, and sterile tank venting.

• The LOONG Solution:

• Hydrophobic PTFE: The ultimate air/gas filter. Prevents moisture from entering sterile tanks during venting.

• Hydrophilic PTFE: Treated to filter aggressive liquids without the need for pre-wetting.

• Use Cases: Fermentation air inlet/exhaust, semiconductor etchants, and solvent API production.

  
  

3. The Industrial Workhorse: Nylon 66 & PVDF

• The Challenge: Clarifying solvents and removing particles from fine chemicals.

• The LOONG Solution: Naturally hydrophilic Nylon 66 provides broad chemical compatibility at an economical price point. PVDF offers an alternative for specific protein-sensitive applications.

• Use Cases: HPLC sample prep, photoresists, and high-purity chemicals.

  
  

The LOONG Membrane Filter Cartridge Quality Promise: "Traceable Trust"

We know that in your industry, documentation is as important as the product itself.

• 100% Integrity Tested: Every sterile-grade cartridge is subjected to non-destructive testing (Bubble Point / Diffusional Flow) before shipment.

• Biological Safety: All wetted components comply with USP Class VI-121°C Biological Reactivity Tests and FDA 21 CFR food contact regulations.

• Pure Construction: We use advanced thermal bonding technology. No adhesives, binders, or surfactants are used, ensuring minimal extractables and low TOC (Total Organic Carbon).

  
  

Seamless Retrofitting of Membrane Filter Cartridge

LOONG cartridges are designed with standard dimensions to fit existing housings from Pall, Millipore, Sartorius, and Parker.

• End Cap Configurations: 222/Fin (Code 7), 226/Fin (Code 2), DOE, and 222/Flat.

• Lengths: 10”, 20”, 30”, 40”.

[Download Validation Guide]
Need to verify chemical compatibility or retention data?
Request our Technical Dossier or start a conversation with our application engineers for a cross-reference quote.

Delivers consistent high flux&adsorption efficacy in extreme process conditions, backed by our core capabilities:

>>>Features an innovative 3D structural design for stable and efficient contaminant retention.

>>>Utilizes raw materials that comply with FDA and USP Class VI standards to ensure fluid purity and safety.

>>>Operates under a dual-certified ISO 9001 & ISO 13485 quality management system.

Industrial Depth Filters

Depth Filter Series—Engineered for Longevity. Built for Performance.

At LOONG FILTRATION, we understand that in high-volume filtration, consistency is currency. A cheap filter that collapses under pressure or allows bypass isn't a bargain—it's a liability.

Our Depth Filtration Series is the backbone of reliable process streams worldwide. By integrating our "Make Purity Second Nature" philosophy with advanced Gradient Density Technology, we manufacture cartridges that capture contaminants throughout the entire cross-section of the filter, not just on the surface.

The Result? You change filters less often, protect your downstream equipment better, and lower your operational costs.

The LOONG Depth Filter Difference: True Volumetric Filtration

Many market-standard filters rely on uniform density, which leads to premature surface blinding. LOONG cartridges are different. We engineer a distinct density gradient:

1. Outer Zone (Low Density): Open pores capture large particulates and gels without blocking flow.

2. Inner Zone (High Density): A tight, rigid core matrix traps the finest silt and ensures specific micron retention.

This structure maximizes Dirt Holding Capacity (DHC), allowing our filters to maintain flow rates longer, even under high differential pressures.

Depth Filter Product Matrix: Choose Your Solution

We offer two distinct technologies to match your specific fluid challenges.

1. Composite Lenticular Filter Series (The Most Popular)

Material: Cellulose, Diatomite, Synthetic

Designed for high-viscosity, colloidal, and multi-component process fluids, it delivers high dirt-holding capacity and retention efficiency through both physical interception and adsorption mechanisms.

• Best For: Wine Clarification;Edible Oil Clarification;Antibiotic Clarification; Clarification and Filtration of Animal Vaccines &Cell Culture Lysate

• Key Advantage: 

  1. Outstanding Dirt Holding Capacity: Unique 3D channel structure delivers ultra-high porosity

  2. Significantly extends service life and reduces replacement frequency

  3. High Retention Efficiency: Dual capture mechanism: physical interception and material adsorption

  4. Excellent filtration performance for colloidal solutions and complex fluids

  5. Wide Fluid Compatibility: Suitable for pretreatment of process fluids with complex compositions

  6. Excellent chemical compatibility ensures process safety

  7. Reliable Process Protection: Provides effective protection for downstream precision filtration systems

  8. Maintains stable performance under demanding process conditions

  9. Reliable Process Consistency: Medical-grade production control, compliant with ISO 13485; Complies with US FDA 21 CFR food contact material regulations; Compliant with USP <88> Class VI

• Micron Range: 0.1μm – 20μm.

2. Activated Carbon Depth Stack Filter Series (The Most Popular)

Material:  Cellulose, Diatomite, Activated Carbon, Synthetic Resin

Activated Carbon Depth Stack Filter combines high-purity activated carbon, cellulose, and positively charged resin to deliver strong adsorption and decolorization with zero carbon shedding. It provides reliable endotoxin removal for biopharmaceutical processes and effective color removal in fine chemical and food industry applications, ensuring high purity and process safety.

• Best For: Off-Flavor & Odor Removal from Sweeteners & Amino Acids；Decolorization of Wine & Juice；Clarification & Purification of Process Liquids

• Key Advantage:• Zero Carbon Dust Shedding• Enhanced Adsorption Capacity• Broad Chemical Compatibility• High Temperature Resistance• High Flow Rate Design• Validated Performance

• Micron Range: 0.5μm – 3μm.

  
  

3. Melt Blown Series (The Pure Standard)

100% Polypropylene | Thermal Bonded | Coreless Strength

This is the industry standard for high-purity applications. Manufactured without binders, glues, or surfactants, our Melt Blown cartridges are non-fiber releasing and biologically inert.

• Best For: RO Pre-filtration, Food & Beverage, DI Water, Plating Solutions.

• Key Advantage: Self-bonded structure resists channeling and bypassing, even when the filter is loaded.

• Micron Range: 1μm – 100μm.

  
  

4. String Wound Series (The Robust Heavyweight)

Honeycomb Weave | Broad Chemical Compatibility | High Temp Ready

When conditions get tough (high heat, aggressive chemicals, or high viscosity), the String Wound series excels. The precise honeycomb winding pattern creates a tunnel-depth effect for trapping varying particle sizes.

• Best For: Petrochemicals, Organic Solvents, Oils, High-Temperature Condensate.

• Material Options:

• Polypropylene: Standard water and acids (<80°C).

• Cotton: Oils and organic solvents (<120°C).

• Glass Fiber: High heat and corrosive chemicals (<400°C).

  
  

The Buyer’s Checklist: Configuration Guide

To ensure seamless integration with your existing filter housings, LOONG offers full customization. Use this checklist to define your requirement:

• Step 1: Length or Layers

• for Meltblown & String Wound Series--Standard: 10", 20", 30", 40"

• for Depth Stack Filter-Layers & Diameter(12''/16'')

• Custom cuts available upon request.

• Step 2: Rating

• You can tell your specification or ask LOONG Filtration expert to suggesst

• Step 3: Surface Treatment (Melt Blown Only)

• Smooth: Standard.

• Grooved: Increases surface area by 50% for extended life.

• Orange Peel: Enhanced stability.

  
  

Proven in 7,800+ Facilities

From the pre-treatment rooms of desalination plants to the mixing tanks of fine chemical manufacturers, LOONG Depth Filters are the silent guardians of quality. We bridge the gap between "Chinese Manufacturing" and "Global Standards," offering you premium performance without the premium price tag.

Stop Settling for "Good Enough"

Experience the difference of True Gradient Density.

[Request a Free Sample Pack]

Qualified businesses can test our filters on-line, risk-free. Contact our engineers to specify your micron rating and size.

Delivers the optimal balance of result reliability and time efficiency, backed by our core capabilities:

>>>Features one-step installation that significantly enhances laboratory workflow efficiency.

>>>Validates precision sealing systems through rigorous testing to ensure leak-free operation.

>>>Operates under ISO 9001 & ISO 13485 quality management system, guaranteeing consistent product quality.

High-Efficiency Vent Filter: Precision Depth Filtration Solutions

Vent Filter Series——Mastering Flow & Purity with LOONG FILTRATION

At LOONG FILTRATION, we believe that purity shouldn't come at the cost of high maintenance or wasted resources. Our Vent Filter Systems are engineered to make purity second nature.  It achieves precise and efficient retention, completely solving filtration challenges in both the lab scale trial phase and small-scale production processes.

With over 21 years of innovation and trust from 7,800+ global clients, we have perfected the balance between filtration precision and operational efficiency. Whether you are protecting sensitive RO membranes, managing agricultural irrigation, or treating industrial cooling water, our disc technology turns complex water challenges into seamless, automated solutions.

How LOONG Vent Technology Works

It is not just a filtration device, but a "3D Stereo Purification Barrier" made of various types of cellulose filter media! Its unique tapered internal structure maintains stable filtration performance even when handling high-viscosity fluids, complex component systems, and even colloidal materials.

The Result: Higher dirt-holding capacity, fewer backwash cycles, and consistent downstream protection.

Why Choose LOONG Vent Filters?

We don't just sell hardware; we deliver "Set-and-Forget" reliability. Our systems are designed to address the most common pain points in water treatment:

• Exceptional Particle Rentention: 3D porous cellulose matrix with gradient pore structure delivers outstanding particulate capture efficiency, ensuring zero leakage and residue left behind.

• Ultra-High Dirt Holding Capacity: Interlaced cellulose construction paired with diatomite enhanced adsorption boosts dirt load capacity significantly and prolongs service cycle effectively.

• Outstanding Cost Efficiency: High dirt-holding capability cuts filter replacement frequency; ergonomic interface slashes labor costs. Dual benefits drive optimal overall operational cost savings.

• Compact Design, Powerful Filtration Performance:Space-saving profile perfectly suits lab settings, while meeting diverse filtration demands – an all-purpose essential for laboratory filtration applications.1. Exceptional Particle Retention

Key Applications of Vent Filter

LOONG Vent Filters are the preferred "Police Filter" for diverse industries:

• Fine Chemical & Food Industry : Applicable to edible sugar, functional sugar, various oils and alcoholic beverages, enabling rapid clarification and purification to elevate product purity.Activated carbon integrated variants realize precise decolorization and deodorization, ideal for processing high-purity materials including APIs.

• Biopharmaceutical & Medical Sector: Suitable for blood products, TCM oral liquids and fermentation broths, delivering high-efficiency clarification to guarantee raw material cleanliness.Activated carbon equipped models achieve accurate endotoxin retention, complying with stringent lab-grade quality standards.

Vent Filter Selection Guide: Finding Your Fit

Common questions from our engineering partners.

Q:What micron ratings are available? How to select the Vent Filter?

Q: What micron ratings are available?

A: We offer precise discs/Veng Filter ranging from 0.2 microns to 20 microns, ensuring we can match the specific requirements of your application.

Flexible Specification Selection about the Vent/Disc Filter

Multiple filter media options are available, including cellulose, diatomite, activated carbon, and synthetic resin. Combined with different models and specifications, customized filtration solutions can be provided to balance both efficiency improvement and cost control.

[Get a Technical Drawing & Quote Today]

Tell us your flow rate and fluid source, and we will design the perfect solution within 24 hours.

Delivers the optimal balance of operational simplicity and filtration reliability, backed by our core capabilities:

>>>Features user-centric design that enables quick and secure installation/removal, minimizing contamination risks.

>>>Utilizes USP Class VI standard materials to ensure absolute safety in pharma & biotech applications.

>>>Operates under ISO 9001 & ISO 13485 quality management system, guaranteeing consistent product quality.

Capsule Filter—The Ultimate "Plug-and-Play" Filtration Solution

As a leading Capsule Filter manufacturer and exporter, LOONG FILTRATION transforms complex filtration setups into simple, disposable solutions. Our capsules embody our core belief—Making Purity Second Nature—by completely eliminating the need for stainless steel housings, cleaning validation, and complex assembly.

Our capsule filters (often called disposable filter assemblies) are self-contained units ready for immediate use. Manufactured in a 100,000-level clean workshop, they offer a safe, leak-proof, and efficient way to process small-to-medium batches of fluids and gases.

Capsule Filter Series—Select by Media: Tailored for Chemistry

We don't believe in "one size fits all." We tailor our membrane technology to your specific fluid characteristics:

• PES (Polyethersulfone): The gold standard for Biopharma. Features asymmetric membrane structure for high flow and low protein binding. Ideal for sterile filtration of vaccines, serums, and culture media.

• PTFE (Polytetrafluoroethylene): The choice for Aggressive Chemicals & Venting. Hydrophobic PTFE is perfect for sterile air/gas venting, while Hydrophilic PTFE handles harsh solvents, acids, and bases without pre-wetting.

• PP (Polypropylene): The workhorse for General Purpose filtration. excellent chemical compatibility and high dirt-holding capacity. Great for pre-filtration and clarification.

• Nylon 66: Robust and versatile, suited for solvent filtration and analytical sample preparation.

  
  

Capsule Filter: Engineered for Your Industry

LOONG’s R&D team has developed specialized capsule configurations to address unique industry pain points:

1. The Digital Printing Edition (Inkjet)

• Challenge: UV inks cure when exposed to light; large particles clog expensive printheads.

• LOONG Solution: We offer Opaque Black Capsules that block UV light, preventing premature curing. Our high-flow internal geometry prevents micro-bubbles, ensuring consistent jetting performance.

2. The Lab-to-Fab Scale-Up

• Challenge: Moving from R&D trials to full production often changes filtration results.

• LOONG Solution: Our capsules use the exact same media materials and pleating technology as our full-size cartridges. This ensures linear scalability—what you test in the lab is exactly what you get on the factory floor.

3. Hazardous Fluid Handling

• Challenge: Operator safety when changing filters containing toxic fluids.

• LOONG Solution: Our thermally welded, adhesive-free construction ensures zero leakage. When the batch is done, the entire unit is discarded, protecting your team from exposure.

  
  

Connectivity & Specifications of Capsule Filter

A capsule filter is only useful if it fits your tubing. We offer the industry's widest range of inlet/outlet connections to ensure seamless integration into your current system.

Interface Options:

• Hose Barb: For flexible tubing (1/4", 3/8", 1/2" etc.)

• NPT / BSP: Threaded connections for rigid piping.

• Sanitary Flange (Tri-Clamp): For pharmaceutical hygienic requirements.

• Compression Fittings (Swagelok compatible): For high-pressure instrumentation.

Technical Data:

• Micron Ratings: 0.05μm – 100μm

• Lengths: From compact 2.5" mini-capsules to 20" high-capacity units.

• Sterilization: Autoclavable (121°C/30min) and Gamma Irradiation compatible options available.

  
  

Why Choose LOONG's Capsule Filter?

We are not just a supplier; we are your technical support team.

• Fast Response: We answer inquiries rapidly and speak plain English.

• Customization: Need a specific vent port location or a unique label? We can do it.

• Global Standards: Our products are validated to meet international purity standards.

[Start Your Selection]

Ensures structural durability and chemical compatibility in demanding conditions, backed by our core capabilities:

>>>Features precision sintering technology that maintains filtration accuracy through multiple cleaning cycles.

>>>Validated by rigorous pressure differential testing to guarantee long-term stable operation extreme conditions.

>>>Utilizes industry-standard metal materials to ensure complete compatibility with process fluids.

Metal Filter—Reliability When Plastic Is Not an Option

In the harshest corners of industry—where temperatures melt polymers and pressures crush standard cores—LOONG FILTRATION stands firm. Our Metal Filter Cartridges are the heavy artillery of filtration, designed for processes where failure is simply not acceptable.

We specialize in Sintered Porous Metal Media. Unlike simple wire mesh screens, our technology involves high-temperature vacuum sintering, which fuses metal particles or wires at their contact points. The result? A rigid, permanent filtration matrix that maintains its pore structure even under massive stress.

Select Your Metal Filtration Technology

We categorize our metal filters by their structural mechanics to help you solve specific fluid challenges.

1. Sintered Stainless Steel Mesh (The Pleated Powerhouse)

• Construction: Multiple layers of woven wire mesh (SS304 / SS316L) are vacuum-sintered together.

• Why Choose It:

• High Permeability: Excellent flow rates with low pressure drop.

• Pleatable: Can be pleated to increase surface area by 5-10x compared to cylindrical tubes.

• Cleanable: Easy to backwash or chemically clean.

• Ideal For: Hydraulic oils, superheated steam, and polymer melt filtration.

  
  

2. Sintered Metal Powder (The Depth Specialist)

• Construction: Metal powder (SS316L or Titanium) is pressed into molds and sintered. This creates a tortuous path for depth filtration.

• Why Choose It:

• Precision: Capable of sub-micron filtration (0.1μm – 100μm).

• Separation: Excellent for gas-liquid separation and sparging (aeration).

• Ideal For: Catalyst recovery, fine chemical processing, and ozone diffusion.

  
  

3. Titanium Rod Filters

• Construction: Pure Titanium powder sintering.

• Why Choose It: Unmatched corrosion resistance in highly oxidizing environments or chlorine-based processes where Stainless Steel would pit or crack.

• Ideal For: Decarbonization in pharmaceuticals and corrosive chemical intermediates.

  
  

Metal Filter:Engineered for Reuse (The ROI Factor)

A  LOONG metal filter is an investment, not a disposable cost.

Designed for longevity, our cartridges can be regenerated multiple times using:

• Ultrasonic Cleaning: For fine particulate removal.

• High-Temp Burnout: To remove organic residues/polymers.

• Acid/Alkali Bath: To dissolve chemical fouling.

• Backflushing: For online automated cleaning systems.

  
  

Customization Capabilities of LOONG Metal Filter

We don't just sell "standard sizes." Our machine shop allows us to fabricate unique connection types to fit your legacy vessels.

• Connections: DOE, 222/Flat, 226/Fin, Threaded (NPT, BSP, G), and Flange adaptors.

• Reinforcement: Internal/External perforated cores for high differential pressure (ΔP) resistance.

  
  

Validated Applications of Metal Filter

• Petrochemical: Filtration of high-temperature slurry oil and fly ash.

• Pharmaceutical: Secure filtration of solvents and sterile steam.

• Food & Beverage: Filtration of viscous syrups and edible oils.

• Electronics: High-purity gas filtration.

[Customize Your Metal Filter]

Facing a high-temp or high-corrosion challenge?

Upload your process data. Our metallurgists will recommend the correct alloy and pore structure to extend your service life.

Ensures stable filtration performance&production line safety, backed by our core capabilities:

>>>Features reinforced seal design for leak-free operation under system fluctuations and high contaminant loading.

>>>Utilizes SGS,FDA certified raw materials to prevent fiber release and secondary contamination.

>>>Operates under ISO 9001 & ISO 13485 quality management system to guarant consistent product quality.

Filter Bags:Precision Manufacturing, Zero-Bypass Performance

For industrial filtration, the filter bag is the workhorse. However, in critical applications—automotive coatings, food & beverage, or fine chemicals—a "standard" sewn bag often becomes the weak link. Needle holes enlarge, threads migrate, and efficiency drops.

LOONG FILTRATION redefines this commodity. As a premier manufacturer and exporter, we have moved beyond traditional sewing. We utilize advanced ultrasonic welding technology in our 100,000-level clean workshop to produce filter bags that are virtually indestructible and 100% leak-proof.

From standard dust collection to absolute-rated liquid clarifying, we deliver the consistency your production line demands.

Filter Bag Construction Technology: The Welded Advantage

We offer two distinct construction methods, but for critical liquid applications, we recommend Welded.

• Fully Welded Construction (The LOONG Standard):Using thermal bonding, we fuse the fabric seams. This eliminates needle holes where particles can bypass and removes the risk of loose threads contaminating your product (fiber migration).

• Best for: High-purity paints, resins, and food products.

• Sewn Construction:A cost-effective option for standard non-critical applications. We use a rugged 5-thread lockstitch for maximum durability.

• Best for: General wastewater and coarse filtration.

  
  

Media Selection Guide of Filter Bag

Select the right material based on your temperature and filtration mechanism.

1. Needle Felt (Depth Filtration)

Traps particles inside the fabric matrix. High dirt-holding capacity.

• Polypropylene (PP): Universal chemical resistance (Acids/Alkalis). Max Temp: 90°C.

• Polyester (PE): Superior heat resistance and tensile strength. Max Temp: 150°C.

• High-Efficiency LCR: Multi-layer construction designed specifically for Oil Absorption and Gel removal. (95%+ Efficiency).

2. Monofilament Mesh (Surface Filtration)

Woven square holes for precise sieving. Washable and Reusable.

• Nylon (NMO): Excellent abrasion resistance. Ideal for removing hard particles and "straining" applications.

  
  

The "Zero-Bypass" Sealing System of Filter Bag

A bag is only as good as its seal. If fluid flows around the ring, the filter is useless. LOONG offers precise collar options to fit all major housing brands (Eaton, FSI, Rosedale):

• SDS / Sentinel Type (Plastic Collar): Our proprietary pressure-activated lip seal. As pressure increases, the seal against the housing wall tightens. 100% Bypass-Free. (Materials: PP, PE).

• Steel Ring: Galvanized or Stainless Steel ring sewn into the top. The traditional choice for gravity flow or non-critical housings.

• Drawstring: For tie-on applications directly to pipes.

  
  

Technical Resource of Filter Bag: Mesh vs. Micron

Don't guess your rating. Use our conversion guide for Nylon Mesh bags:

Sizing & Packaging of Filter Bag

Standard Industry Sizes:

• Size #1: Ø 7" x 17" Long

• Size #2: Ø 7" x 32" Long (Most Popular)

• Size #3: Ø 4" x 9" Long

• Size #4: Ø 4" x 15" Long

The Cleanliness Promise:

Unlike generic bulk-packed bags, LOONG Filter Bags are individually wrapped and sealed in our cleanroom. We ensure that the only thing entering your process fluid is the bag itself—not warehouse dust.

Ready to Order?

Whether you need 50 pieces for a trial or 5,000 pieces for annual stock, our logistics team ensures rapid global delivery.

[Request Your OEM Quote]

Attach your datasheet or photos. We guarantee a fit for your existing filter housing.

Ensures reliable filtration at high flow rates, backed by our core strengths:

>>>Features proprietary membrane&specialized pleating technology to extend service life at rated flow.

>>>Certified to NSF, TUV, and SGS standards for long-term use safety and material compliance.

>>>Operates under a dual-certified ISO 9001 & ISO 13485 quality system, with each unit verified by integrity testing.

The Power of High Flow Filter Cartridge: Replacing Complexity with Efficiency

In the demanding environments of Desalination, Power Generation, and Steel Manufacturing, standard filtration systems create a bottleneck. Managing hundreds of 2.5-inch cartridges means massive housing footprints, lengthy shutdowns for change-outs, and escalating disposal costs.

LOONG FILTRATION offers a superior alternative. Our High Flow Filter Cartridges leverage a massive 6-inch (152mm) diameter and advanced pleating technology to handle flow rates up to 113 m³/h per single element.

This isn't just a filter; it's a system optimization tool. By switching to LOONG High Flow, you can reduce your filtration footprint by 50% and cut maintenance time by 90%.

The Mathematics of High Flow Filter Cartridge Efficiency

Why choose High Flow? The numbers speak for themselves.

• 1 LOONG High Flow Cartridge ≈ 20 Standard Melt Blown Filters

• 1 LOONG High Flow Cartridge ≈ 10 Standard Pleated Filters

• 1 LOONG High Flow Cartridge ≈ 4 Filter Bags

By consolidating filtration surface area into fewer, larger elements, you eliminate the need for massive multi-cartridge vessels. This lowers your initial capital expenditure (CAPEX) on housings and drastically reduces operating expenses (OPEX).

High Flow Filter Cartridge Series:Tailored for Drop-In Replacement

We engineer our cartridges to be 100% compatible with the world's leading high-flow housing systems. You get OEM-level performance with the cost advantage of direct manufacturing.

Series 1:The "HFP" (Pall Ultipleat Style)

• Design: Crescent-shaped pleat geometry with an Inside-to-Outside flow direction.

• Benefit: Contaminants are trapped inside the cartridge. When you remove the filter, the dirt comes out with it, ensuring the clean side of the housing remains pristine.

• Application: RO Pre-filtration, Condensate Water.

  
  

Series 2: The "HFM" (3M Cuno / Parker MegaFlow Style)

• Design: Radial pleating with reliable O-ring seals. Available in 40" and 60" lengths.

• Benefit: Extremely high surface area for maximum dirt holding capacity.

• Application: Municipal water, Amine systems in Oil & Gas.

  
  

Series 3:The "HFF" (Filtryzer Style)

• Design: Vertical pleating designed for ultra-high flux rates.

• Application: LCD Wet processing and chemical delivery.

  
  

High Flow Filter Cartridge Material Science: Beyond Polypropylene

While Polypropylene (PP) is the industry standard for general water treatment, LOONG goes further. We offer Glass Fiber (GF) media options for applications requiring higher efficiency or oil removal capabilities. All cartridges are constructed with a rigid outer cage to withstand high differential pressures without collapsing.

Applications Breakdown of High Flow Filter Cartridge

• Sea Water Desalination: Vital protection for RO membranes.

• Power Plants: Condensate polishing and cooling water treatment.

• Petrochemicals: Amine sweetening and produced water injection.

• Food & Beverage: Process water for large-scale bottling.

[Get a Retrofit Quote]

Stop paying for the brand name—pay for the performance.

Send us your current filter part number, and our engineers will provide a detailed Cross-Reference Spec Sheet and a competitive proposal today.

Ensures structural integrity and long-term operational reliability, backed by our core capabilities:

>>>Features ASME-standard welding and forming, rigorously pressure-tested for zero leakage.

>>>Complies with CE, TUV, and UL certifications, guaranteeing reliable and safe operation.

>>>Provides complete technical documentation and dedicated after-sales service.

Stainless Steel Filter Housings

The Robust Heart of Your Filtration System.

A filter cartridge or bag is only as effective as the housing that holds it. Leakage, corrosion, or poor sealing can render even the most expensive filter media useless.

At LOONG FILTRATION, we manufacture precision-engineered Stainless Steel Filter Housings that serve as the secure foundation for your process purity. Whether you require a hygienic vessel for pharmaceutical WFI loops or a heavy-duty industrial pot for chemical solvents, our housings are built to strict global standards.

Filter Housing Series—Crafted for Your Industry

We separate our vessels into three distinct grades to match your regulatory requirements:

1. Sanitary Grade Housings (Pharma & F&B)

• Finish: Mechanical polishing to Ra < 0.4μm or Electropolishing (EP). No dead legs, easy to clean (CIP/SIP).

• Connection: Tri-Clamp (TC) sanitary fittings.

• Application: Sterile filtration, vaccine production, beer/wine clarification.

• Design: Accepts Code 7 (226) or Code 2 (222) cartridges for zero bypass.

  
  

2. Industrial Grade Housings (General Process)

• Finish: Sandblasted or Bead Blasted exterior for durability; acid-pickled interior for corrosion resistance.

• Connection: Flanges (ANSI/DIN/JIS) or Threaded (NPT/BSP).

• Application: RO Pre-filtration, cooling water, chemical processing, and paints.

  
  

3. High-Pressure / Gas Housings

• Specs: Engineered for high-pressure air/gas lines or aggressive chemical injection.

• Design: Heavy wall thickness and reinforced closure mechanisms.

  
  

Filter Housing Types: Flexible Configurations

LOONG offers a comprehensive range of vessel designs to accommodate any flow rate.

• Single Cartridge Housings: Ideal for point-of-use filtration or lab scale-up. Fits 5" to 40" lengths.

• Multi-Cartridge Housings: High-capacity vessels holding 3 to 100+ rounds. Equipped with davit arms or spring-assisted lid lifters for safe, easy maintenance.

• Bag Filter Housings: Single and multi-bag vessels compatible with standard Size #1, #2, #3, and #4 bags. Features basket restrainers and positive sealing mechanisms.

• Lenticular Filter Housings: Specialized vessels for disc stack modules, widely used in wine and beverage depth filtration.

  
  

The LOONG Filter Housing Engineering Standard

We don't just weld steel; we engineer safety and reliability.

• Material Guarantee: We use only certified SS304 and SS316L. Material Test Reports (MTR) are available for every heat number.

• Pressure Safety: Designed in accordance with ASME VIII Div.1 or PED standards (upon request) to ensure operational safety under pressure.

• Leak-Free Design: All closures use high-grade O-rings (EPDM, Viton, Silicone, PTFE Encapsulated) to ensure 100% sealing integrity.

  
  

Customization is Standard for LOONG Filter Housing

Have a tight footprint or a unique piping layout?

• Orientation: Vertical or Horizontal mounting.

• Port Location: Side-In/Side-Out, Side-In/Bottom-Out, or Inline.

• Add-ons: Vent/Drain valves, Pressure Gauge ports, and Heating Jackets.

[Build Your Vessel]

Stop compromising with "standard" sizes.

Send us your P&ID or flow requirements. Our mechanical engineers will draft a housing drawing that fits your system perfectly.

Safeguards the activity yield of high-value products and ensures process compliance, backed by our core capabilities:

>>>Features open-channel architecture that protection of shear-sensitive substances during highly efficient separation.

>>>Utilizes USP Class VI standard materials to guarantee safety for pharma & biotech and food & beverage applications.

>>>Operates under ISO 9001 & ISO 13485 quality management system, ensuring consistent and reliable product quality.

Hollow Filber Ultrafilter—Precision Separation at the Molecular Level.

In modern water treatment, Ultrafiltration (UF) is the critical barrier between "dirty" water and "process-ready" water. Whether you are protecting downstream Reverse Osmosis (RO) membranes or recycling industrial wastewater, the quality of your UF module dictates the efficiency of your entire plant.

LOONG FILTRATION manufactures high-performance Hollow Fiber UF Modules designed for resilience. By engineering fibers with superior mechanical strength and specific pore structures, we deliver membranes that resist fouling, withstand frequent backwashing, and maintain high flux rates over a long service life.

Hollow Fiber Ultrafilter Material Science: The Core of Filtration

We offer two distinct membrane chemistries to match your water conditions and budget:

1. Reinforced PVDF (Polyvinylidene Fluoride)

• The Premium Choice: Known for its exceptional mechanical strength and chemical resistance.

• Anti-Fouling: Our permanently hydrophilic modification resists organic fouling, making it easier to clean.

• Durability: Withstands high oxidant concentrations (Chlorine) during Clean-in-Place (CIP) cycles.

• Best For: Difficult wastewater, surface water with high organics, and large-scale Desalination pre-treatment.

  
  

2. Alloy PVC (Polyvinyl Chloride)

• The Economic Choice: A cost-effective solution for standard water applications.

• Performance: Delivers excellent pathogen removal and turbidity reduction at a lower capital cost.

• Best For: Municipal tap water, well water purification, and light industrial applications.

  
  

Operating Configurations of Hollow Fiber Ultrafilter

Understanding that every system design is unique, LOONG provides flexible flow modes:

• Outside-In Filtration:Feed water flows from the outside of the fiber to the inside. This allows for higher solids loading and more effective air scouring.

• Ideal for: High turbidity feed water and MBR (Membrane Bioreactor) applications.

• Inside-Out Filtration:Feed water flows through the lumen of the fiber. This provides uniform hydrodynamics and precise cutoff.

• Ideal for: Cleaner feed water streams requiring absolute bacteria removal.

  
  

Technical Performance Metrics of Hollow Fiber Ultrafilter

Our modules are validated to deliver the numbers your engineers care about:

• MWCO (Molecular Weight Cut-Off): 6,000 Daltons – 100,000 Daltons.

• Output Quality: Turbidity < 0.1 NTU; Silt Density Index (SDI) < 3.

• Removal Efficiency: 99.99% removal of bacteria, viruses, and colloids.

  
  

Applications of Hollow Fiber Ultrafilter

• RO Pre-Treatment: Significantly extends the life of RO membranes by removing colloids that cause fouling.

• Wastewater Reuse: Treating textile, dyeing, or plating wastewater for recycling.

• Food & Beverage: Clarification of fruit juices, soy sauce, and protein concentration.

• Electrophoretic Paint: Recovery of electrophoretic paint in automotive manufacturing.

  
  

Hollow Fiber Ultrafilter:Drop-In Replacements

LOONG UF modules are engineered with standard dimension ports (Victaulic or Threaded) to serve as direct replacements for major international brands (e.g., Dow, Hydranautics, Suez). We provide equivalent active membrane areas to ensure your system capacity remains unchanged.

[Get a System Design Proposal]

Building a new skid or retrofitting an old one?

Share your Feed Water Quality Report. Our application engineers will calculate the Flux Rate and recommend the optimal Module Quantity for your system.