
PP Melt Blown Filter Cartridge 20 Micron 40 Inch: Heavy-Duty First-Stage Filtration For Raw Water
Introduction:If you are looking for durable PP Melt Blown Filter Cartridge 20 Micron 40 Inch for heavy-duty raw water pretreatment, large-flow circulating water filtration and high-turbidity industrial water purification, this 20μm gradient depth filter delivers excellent large-particle interception and supreme dirt holding performance. Featuring an open gradient polypropylene fiber structure, it effectively intercepts bulk sediment, rust scale, large suspended solids and macroscopic impurities that easily clog fine filter elements. Designed specifically for harsh raw water conditions, it maintains stable high flow rate with ultra-low pressure drop increase. As the most cost-effective first-stage barrier filtration solution, it significantly reduces the pollution load of downstream precision filters and RO membrane systems, greatly extending the overall service life of the water treatment system. Widely applied in municipal water plants, power station circulating water, industrial wastewater reuse, mining water treatment and large-scale water engineering projects.
We're here to help:
Easy ways to get the answers you need.
Product parameter:
Product Overview
PP Melt Blown Filter Cartridge 20 Micron 40 Inch is a heavy-duty industrial primary depth filter optimized for high-turbidity raw water. Produced from 100% virgin food-grade polypropylene resin via fully automatic melt-blown one-piece thermal molding process, the filter adopts a scientific outer-loose-inner-dense gradient fiber structure. Without any chemical adhesive, all fibers are thermally fused together, ensuring zero shedding and zero secondary water pollution. The 20μm open fiber gap design provides maximum dirt storage space and outstanding anti-clogging ability, solving the common problem of short service life of fine filters in turbid raw water. Standard 40-inch industrial size, 60mm outer diameter and 30mm inner diameter, fully compatible with all mainstream standard filter housings on the market. It is the preferred first-stage filter for large-volume water treatment systems with poor raw water quality.
Working Principle
PP Melt Blown Filter Cartridge 20 Micron 40 Inch adopts outside-in three-dimensional gradient depth filtration principle. When high-turbidity raw water flows through the filter cartridge, large-scale impurities such as sand, gravel and rust flakes are trapped by the loose outer fiber layer. Medium suspended particles are blocked in the middle transition layer. Fine particulate matter above 20μm is deeply intercepted by the dense inner fiber layer. Different from simple surface blocking of ordinary filters, the multi-layer progressive filtration structure disperses dirt evenly in the entire filter body, maximizing dirt holding capacity and avoiding rapid local blockage. It maintains long-term stable high-flow operation and effectively reduces the frequency of equipment maintenance and filter replacement.
Core Technical Specifications
| Item | Parameter |
|---|---|
| Model | PP Melt Blown 20μm 40" |
| Material | 100% Virgin Polypropylene |
| Filtration Rating | 20 μm Heavy-Duty Grade |
| Length | 40 inch (1016 mm) |
| Outer Diameter | 60 mm |
| Inner Diameter | 30 mm |
| Flow Direction | Outside to Inside |
| Max Continuous Temperature | ≤60℃ |
| Max Differential Pressure | 2.0 bar |
| Structure | Gradient Density, Glue-Free Thermal Fusion |
| Core Feature | Super anti-clogging, ultra-large dirt holding, low pressure drop |
Core Advantages

Heavy-duty 20μm coarse filtration design:
Open fiber structure adapts to high-turbidity, high-sediment raw water, intercepts massive macroscopic impurities.
Industry-leading dirt holding capacity:
Gradient three-dimensional filtration makes full use of the entire filter depth, greatly extending service cycle.
Zero-pollution integrated molding:
Pure PP raw material with thermal bonding process, no fiber falling off, safe for drinking water and industrial process water.
Ultra-low flow resistance:
Optimized fiber gap ensures large water flow and low pressure drop, reducing system operating energy consumption.
Extreme cost performance:
Low replacement cost, strong environmental adaptability, ideal for large-scale industrial water pretreatment projects.
Main Application Scenarios

Municipal water plant raw water first-stage filtration
Power plant large-flow circulating water and cooling water treatment
Mining, river water and reservoir high-turbidity water pretreatment
Industrial wastewater reuse and reclaimed water filtration projects
Chemical, paint and ink liquid coarse impurity removal
Front-end protection for fine filters, ultrafiltration and reverse osmosis systems
Compatibility & Cross Reference
| Model | Specification | Application Scenario |
|---|---|---|
| PP Melt Blown 20μm 40" | 40 inch,20μm heavy-duty coarse filter | High turbidity raw water pretreatment |
| PP Melt Blown 10μm 40" | 40 inch,10μm standard filter | Conventional industrial water |
| PP Melt Blown 5μm 40" | 40 inch,5μm fine filter | General precision pretreatment |
| PP Melt Blown 20μm 20" | 20 inch short-type filter | Small and medium water equipment |
FAQ
Q1: Why choose 20μm melt blown filter for raw water pretreatment?
A1: The 20μm large pore structure has excellent anti-clogging performance and super dirt holding capacity, which can quickly remove a large amount of sediment impurities in raw water and protect downstream precision filter elements.
Q2: Can this filter work continuously for a long time?
A2: Yes. With low pressure drop design and stable PP material, it supports 24-hour continuous industrial circulating water operation.
Q3: Is it reusable after washing?
A3: It is a disposable depth filter element. After the pressure difference rises to the standard value, direct replacement is recommended to ensure water quality stability.
Q4: Are customized sizes available?
A4: Full specifications of 10/20/30/40 inch and 1μm–100μm precision grades are available for bulk orders.
Related Products
PP Melt Blown Filter Cartridge 1 Micron 40 Inch
PP Melt Blown Filter Cartridge 5 Micron 40 Inch
40 Inch Pentair Style High Flow Pleated Filter Cartridge
Please fill in your procurement needs and contact information








