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Long Life Filters

LONG LIFE FILTER (LLF) SLEEVES

Long Life Filter (LLF) Sleeves

Cylindrical Metallic Filter Sleeves for Continuous Polymer Melt Filtration

Purofiltec manufactures precision-engineered Long Life Filter (LLF) Sleeves designed for continuous polymer melt filtration in biaxially oriented film production lines. These cylindrical metallic filter sleeves are widely used in BOPP, BOPE, capacitor-grade film, CPP, BOPET, and other specialty film extrusion lines, where consistent melt filtration is critical for achieving superior film quality, process stability, and extended production runs.

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15–125 µm Absolute Filtration
OEM Compatible Designs
Complete LLF Hardware Available
Long Life Filter LLF Sleeves for Continuous Polymer Melt Filtration
Long Life Filter Sleeves
Long Life Filter LLF Sleeves
Cylindrical Metallic Filter Sleeves
PRODUCT OVERVIEW

Continuous Polymer Melt Filtration with LLF Sleeves

Purofiltec manufactures precision-engineered Long Life Filter (LLF) Sleeves designed for continuous polymer melt filtration in biaxially oriented film production lines. These cylindrical metallic filter sleeves are widely used in BOPP, BOPE, capacitor-grade film, CPP, BOPET, and other specialty film extrusion lines, where consistent melt filtration is critical for achieving superior film quality, process stability, and extended production runs.

Manufactured from high-quality stainless steel woven wire mesh, our LLF sleeves provide uniform filtration, low pressure drop, high mechanical strength, and excellent dimensional stability under demanding processing conditions. Designed for long service life, they ensure consistent melt flow, efficient contaminant retention, and reduced filter change frequency, maximizing line productivity.

Trusted by leading BOPP film manufacturers, Purofiltec supplies LLF Sleeves to over 90% of BOPP production lines in India, delivering reliable filtration performance and consistent film quality.

ENGINEERED PERFORMANCE

Key Features

LLF Sleeves are engineered for continuous polymer melt filtration, combining cylindrical metallic construction, specially designed woven filter media, mechanical strength, and dimensional stability for demanding film extrusion applications.

Cylindrical Sleeve Construction

Specially designed Woven Filter Media for PP applications

Uniform Polymer Flow Distributions

Low Pressure Drop

Excellent Mechanical Strength

High Temperature Performance

Long Operating Life

Complete Hardware Assemblies Available

APPLICATIONS

Applications

Long Life Filter (LLF) Sleeves are designed for continuous polymer melt filtration in BOPP, BOPE, CPP, BOPET, and multilayer film extrusion lines, supporting consistent filtration, stable melt flow, and reliable production performance.

BOPP Film Lines

BOPE Film Lines

CPP Film Production

Multilayer Film Extrusion

Masterbatch applications

Engineering Polymer

BOPET Film Production

Multilayer Film Extrusion

TECHNICAL DATA

Technical Specifications

Long Life Filter (LLF) Sleeves are manufactured as cylindrical metallic filter elements using stainless steel woven wire mesh for continuous polymer melt filtration and extended operating life.

Dimensions are manufactured as per OEM drawings.
PARAMETER SPECIFICATION
Product Type
Long Life Filter (LLF) Sleeve
Construction
Cylindrical Metallic Sleeve
Filter Media
Highpor specially designed for PP application
Material
SS304, SS316, SS316L
Filtration Rating
15–125 µm absolute
Hardware Assembly
Available
Dimensions
Manufactured as per OEM Drawings
OEM-COMPATIBLE SOLUTION

OEM-Compatible Replacement Filters for Cofit® Continuous Screen Changers

Purofiltec also manufactures OEM-compatible replacement filter elements and hardware assemblies for Cofit® continuous polymer melt filtration systems, offering the same precision manufacturing, high-performance woven wire mesh media, and reliable filtration used in our LLF Sleeves.

Available with:
Filtration Ratings: 15–125 µm (Absolute)
Complete Hardware Assemblies
Custom Sizes as per OEM Drawings
HighPor™ Filter Media
Short Lead Times
WHY CHOOSE PUROFILTEC

Why Choose Purofiltec?

Purofiltec provides LLF Sleeves and related hardware solutions with a focus on filtration performance, dimensional accuracy, availability, and technical support.

Supplying LLF Sleeves to over 90% of BOPP production lines in India

Ready-to-Dispatch Inventory Available in 75 µm & 90 µm

Complete LLF Hardware Assemblies

High-Quality Stainless-Steel Media

All Sizes available

Shortest lead time

OEM-Compatible Precision Manufacturing

Technical Engineering Support

FAQ

Frequently Asked Questions

Technical answers to common questions about Long Life Filter (LLF) Sleeves.

Purofiltec has established itself as a trusted supplier of Long Life Filter (LLF) Sleeves for BOPP film production. With over 90% market presence in India's BOPP LLF filtration segment, our filters are recognized for their dimensional accuracy, reliable performance, long service life, and compatibility with leading film extrusion systems.

LLF Sleeves are primarily used in BOPP, BOPET, BOPE, BOPA, CPP, and multilayer film extrusion lines, as well as other polymer processing applications.

Yes. In addition to replacement filter sleeves, Purofiltec supplies complete hardware assemblies including support cages, end rings, retaining components, and other metallic parts manufactured according to OEM specifications.

Purofiltec LLF Sleeves are available with 15–125 µm absolute filtration ratings, depending on the required application.

NEED LLF FILTER SLEEVES?

Discuss Your LLF Sleeve Requirement

Share your OEM drawing, filtration rating, LLF sleeve dimensions, or film-line requirements with our technical team.

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