PP Melt Blown Filter Cartridge with DOE Connection and PP Spring Extension

AALFilter PP Melt Blown Filter Cartridge with DOE Connection and PP Spring Extension is a high-performance polypropylene depth filter designed for reliable particle removal in industrial liquid filtration systems. Featuring a Double Open End (DOE) connection design with a PP spring extension on one end, this filter cartridge provides stable installation, excellent sealing performance, and compatibility with a wide range of standard filter housings.

Manufactured using advanced melt blown polypropylene fiber technology, the filter cartridge is constructed with continuous PP microfibers that create a three-dimensional filtration matrix. This depth filtration structure effectively captures suspended solids, dirt, rust particles, sediments, and other contaminants throughout the entire filter media thickness.

The cartridge features a 3-layer gradient structure for superior filtration efficiency and dirt-holding capacity. The progressive density design allows larger particles to be trapped in the outer layer while finer particles are captured in the inner filtration layer, providing longer service life, lower pressure drop, and consistent filtration performance.

AALFilter PP Melt Blown Filter Cartridge is widely used in industrial water treatment, RO pretreatment, chemical filtration, process liquid filtration, food and beverage filtration, and general industrial applications.

Features

3-Layer Gradient Density Structure for High Filtration Performance

Unlike conventional single-density melt blown cartridges, AALFilter PP Melt Blown Filter Cartridge adopts a 3-layer gradient filtration structure.

The progressive density design provides:

· Outer Layer – Pre-filtration Layer 

o Captures larger particles and suspended solids

o Prevents premature clogging of the inner filtration layer

· Middle Layer – Intermediate Filtration Layer 

o Removes medium-size contaminants

o Improves overall filtration efficiency

· Inner Layer – Fine Filtration Layer 

o Provides accurate particle retention

o Ensures stable filtration performance

This advanced structure delivers:

· Superior filtration efficiency
· Higher dirt-holding capacity
· Longer cartridge service life
· Lower initial pressure drop
· More stable filtration performance

DOE (Double Open End) Connection Design

The filter cartridge features a standard DOE (Double Open End) configuration, making it suitable for most industrial filter housings.

Advantages include:

· Easy installation and replacement

· Excellent compatibility with standard cartridge housings

· No additional adapters required

· Reliable sealing performance

The DOE design is commonly used in industrial water filtration and process filtration systems where high compatibility and easy maintenance are required.

PP Spring Extension on One End for Stable Installation

AALFilter PP Melt Blown Filter Cartridge is equipped with a PP Spring Extension on One End, which provides additional support during installation and operation.

Benefits of the PP spring extension:

· Improves cartridge positioning inside the filter housing

· Prevents cartridge movement during operation

· Enhances sealing reliability

· Ensures stable filtration performance under continuous flow conditions

This design is especially suitable for filter housings requiring spring-loaded cartridge support.

100% Polypropylene Construction with Excellent Chemical Compatibility

The filter cartridge is manufactured from 100% polypropylene (PP) materials, including:

· Filter media

· Core structure

· End caps

· Spring extension

The all-polypropylene construction provides:

· Excellent chemical resistance

· Low extractables

· No fiber shedding

· Wide compatibility with industrial liquids

It is suitable for applications involving:

· Industrial water

· Chemicals

· Weak acids and alkalis

· Process fluids

· Pretreatment systems

Wide Range of Micron Ratings Available

AALFilter PP Melt Blown Filter Cartridges are available in multiple filtration ratings to meet different application requirements.

Available micron ratings:

· 1 micron

· 3 micron

· 5 micron

· 10 micron

· 20 micron

· 50 micron

· 75 micron

· 100 micron

Different filtration grades can be selected according to contaminant levels, flow requirements, and system protection needs.

Product Selection Table

Typical Applications

Industrial Water Filtration

AALFilter PP Melt Blown Filter Cartridges are widely used for:

· RO system pretreatment

· Ultrafiltration system protection

· Industrial process water filtration

· Cooling water filtration

· Pure water filtration

Chemical and Process Liquid Filtration

Suitable for:

· Chemical solution filtration

· Acid and alkaline liquid filtration

· Process fluid purification

· Manufacturing liquid filtration

Food and Beverage Filtration

Common applications include:

· Drinking water filtration

· Beverage production filtration

· Raw material liquid filtration

· Process protection filtration

Frequently Asked Questions (FAQ)

1. What is a DOE PP Melt Blown Filter Cartridge?

A DOE PP Melt Blown Filter Cartridge refers to a polypropylene melt blown filter cartridge with Double Open End connections on both ends. It is one of the most commonly used cartridge configurations for industrial filter housings due to its simple installation and broad compatibility.

2. What is the advantage of the 3-layer gradient structure?

The 3-layer gradient structure allows contaminants to be captured progressively from coarse particles to fine particles. Compared with standard uniform-density melt blown cartridges, it provides higher dirt-holding capacity, longer service life, and more stable pressure drop performance.

3. Why use a PP spring extension on the filter cartridge?

The PP spring extension helps keep the cartridge firmly positioned inside the housing, improving sealing performance and preventing movement during operation.

4. Can AALFilter customize PP Melt Blown Filter Cartridges?

Yes. AALFilter provides customized melt blown filter cartridge solutions, including:

· Customized length

· Customized diameter

· Different micron ratings

· DOE / SOE connection options

· PP spring extension design

· OEM packaging and labeling

Partner with AALFilter for High-Performance PP Melt Blown Filtration Solutions

AALFilter specializes in manufacturing PP Melt Blown Filter Cartridges, DOE Filter Cartridges, and customized industrial filtration products for global customers.

With advanced melt blown manufacturing technology, strict quality control, and flexible OEM capabilities, AALFilter delivers reliable filtration solutions for industrial water treatment, chemical processing, and liquid purification applications.

Whether you need a standard PP Melt Blown Filter Cartridge with DOE connection or a customized cartridge with PP Spring Extension and special configurations, AALFilter can provide the right filtration solution for your system.

Contact AAL Filter today to discuss your PP Melt Blown Filter Cartridge requirem