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