Meltblown Filter Cartridge Technical Details and Specifications

Meltblown Cartridge Filter Construction and Working Principle

Gopani’s RO Protect meltblown filter cartridges are manufactured using a proprietary melt-blowing process where virgin polypropylene resin is extruded through precision die nozzles and attenuated by high-velocity hot air to produce ultra-fine microfibers. These fibers are collected on a rotating mandrel and thermally bonded to create a self-supporting, binderless depth filter element.

Unlike conventional uniform-density cartridges, Gopani’s meltblown cartridges feature a true graded-density structure. The outer layers are engineered with a more open fiber arrangement to capture larger particles, while the fiber density progressively increases toward the inner core for fine particle retention. This multi-zone architecture delivers 2 to 3 times the dirt holding capacity of standard PP spun filter cartridges, resulting in longer service intervals and lower total cost of ownership.

Technical Specifications Overview

Gopani offers five distinct meltblown cartridge filter variants under the RO Protect product family, each engineered for specific application demands:

RO Protect Ultra is the flagship variant offering the widest micron range (1 to 25 micron) with DOE end fittings and standard 10-inch to 40-inch lengths. RO Protect Eco (RECO prefix) covers 1 to 25 micron with DOE configuration and maximum operating temperature of 80 degrees C. RO Protect Eco Plus (RPEP prefix) features 2X dirt holding capacity with 7 end fitting options across 1, 5, and 10 micron ratings. RO Protect Prime delivers premium filtration performance for demanding industrial applications. RO Protect Extreme (RPEX prefix) provides the finest filtration at 0.5 micron with FDA 21 CFR 177 compliance, grooved outer surface option, and weld-free construction for pharmaceutical and food-grade applications.

Claryfil Visco M is a specialty meltblown cartridge designed for high-viscosity fluid filtration applications where standard PP cartridges do not perform optimally.

RO Protect Meltblown Cartridge Variant Comparison

Gopani manufactures five distinct meltblown cartridge variants under the RO Protect RO Protect brand. Use this comparison to select the right variant for your application requirements.

Specification RO Protect Ultra RO Protect Eco RO Protect Eco Plus RO Protect Prime RO Protect Extreme
Part Prefix RPU- RECO- RPEP- RPP- RPEX-
Micron Range 1 to 25 1 to 25 1, 5, 10 1, 5, 10 0.5
Max Temp 60 degrees C 80 degrees C 60 degrees C 80 degrees C 80 degrees C
End Fittings DOE DOE 7 options 7 options 7 options
Lengths 10″ to 40″ 10″ to 40″ 10″ to 40″ 10″ to 40″ 10″ to 40″
Dirt Capacity Standard Standard 2X Standard High High
FDA 21 CFR 177 No No No No Yes
Weld-Free No No No No Yes
Best For General pre-filtration, best value High-temp DOE applications Extended life, multi-housing Premium industrial Pharma, food, fine filtration

Key Performance Advantages

All Gopani RO Protect meltblown cartridges share these performance characteristics that set them apart from competitors:

Zero Media Migration: The thermal bonding process ensures no fiber shedding or media migration, critical for applications where downstream contamination is unacceptable. Broad Chemical Compatibility: Polypropylene construction provides excellent resistance to acids, alkalis, and most organic solvents at concentrations and temperatures within the cartridge’s operating range. No Binders or Surfactants: Pure PP construction with no chemical additives means no extractables that could contaminate your process fluid. Wide Operating Range: Available in micron ratings from 0.5 to 25 micron with maximum operating temperatures up to 80 degrees C depending on the variant selected.

Quality Assurance and Certifications

All Gopani meltblown filter cartridges are manufactured in an ISO 9001:2015 certified facility in Ahmedabad, India. Gopani has been manufacturing filtration products since 1993, with exports to over 30 countries worldwide. Select variants meet FDA 21 CFR 177 requirements for food contact applications. Every production batch undergoes rigorous quality testing including bubble point testing, differential pressure measurements, and filtration efficiency validation to ensure consistent performance across every cartridge delivered.

Key Features of Gopani Meltblown Cartridge Filters

Engineered for superior filtration performance across demanding industrial applications

Graded-Density Construction

Multi-zone fiber density structure with progressively tighter filtration from outer to inner core, delivering 2 to 3 times the dirt holding capacity of uniform-density cartridges for longer service life and lower operating costs.

100% Pure Polypropylene

Manufactured from virgin PP resin with no binders, adhesives, or surfactants. Thermally bonded fibers ensure zero extractables and zero media migration, making them safe for food, beverage, and pharmaceutical applications.

Wide Micron Range (0.5 to 25 Micron)

Available in micron ratings from 0.5 to 25 micron across 5 product variants, covering applications from coarse pre-filtration to fine particle removal in process-critical systems.

Broad Chemical Compatibility

Polypropylene construction provides excellent resistance to a wide range of acids, alkalis, and organic solvents. Maximum operating temperatures up to 80 degrees C depending on the variant selected.

Multiple End Fitting Configurations

Available in DOE, 222 flat, 222 fin, 226 flat, 226 fin, and other industry-standard configurations with lengths from 10 to 40 inches. Direct replacements for Pall, Parker, Graver, and 3M Cuno cartridges.

ISO 9001:2015 Certified Manufacturing

Every cartridge is manufactured in Gopani's ISO 9001:2015 certified facility with rigorous quality testing including bubble point, differential pressure, and filtration efficiency validation. Over 30 years of filtration expertise since 1993.

Graded-Density Construction

Multi-zone fiber density structure with progressively tighter filtration from outer to inner core, delivering 2 to 3 times the dirt holding capacity of uniform-density cartridges for longer service life and lower operating costs.

100% Pure Polypropylene

Manufactured from virgin PP resin with no binders, adhesives, or surfactants. Thermally bonded fibers ensure zero extractables and zero media migration, making them safe for food, beverage, and pharmaceutical applications.

Wide Micron Range (0.5 to 25 Micron)

Available in micron ratings from 0.5 to 25 micron across 5 product variants, covering applications from coarse pre-filtration to fine particle removal in process-critical systems.

Broad Chemical Compatibility

Polypropylene construction provides excellent resistance to a wide range of acids, alkalis, and organic solvents. Maximum operating temperatures up to 80 degrees C depending on the variant selected.

Multiple End Fitting Configurations

Available in DOE, 222 flat, 222 fin, 226 flat, 226 fin, and other industry-standard configurations with lengths from 10 to 40 inches. Direct replacements for Pall, Parker, Graver, and 3M Cuno cartridges.

ISO 9001:2015 Certified Manufacturing

Every cartridge is manufactured in Gopani's ISO 9001:2015 certified facility with rigorous quality testing including bubble point, differential pressure, and filtration efficiency validation. Over 30 years of filtration expertise since 1993.

RO Protect Ultra

Popular pp melt blown filter cartridge for pre-RO filtration, desalination and waste water treatment

Know More

RO Protect Eco Plus

Economical pp melt blown cartridge filter variant with 2X dirt holding capacity

Know More

RO Protect Eco

Economical melt blown cartridge filter for excellent filtration and good thermal stability

Know More

RO Protect Extreme

PP Melt Blown Cartridge Filter for Extreme Filtration Consistency and Capacity

Know More

Claryfil Visco M

It takes an unparalleled expertise in filtration, & cutting edge technology to build products like Claryfil Visco M.

Know More

Not Sure Which Meltblown Cartridge Fits Your Application?

Send us your current filter part number OR your process fluid details. Our filtration engineers will recommend the exact RO Protect variant, micron rating, and configuration — free of charge, within 24 hours.

Get Free Filtration Recommendation Download Meltblown Cartridge Brochure

Talk to our Experts

Length variants available

9.75”, 10”, 20”, 30”, 40”, 50”, 60”, 70” in standard and jumbo sizes.

Engineered Core

Polypropylene

Filter medium

Polypropylene

Uncompromised Quality

We have a thorough quality check process for all the products, whether manufactured in-house or sourced from vendors. This way we ensure that any product that moves out of our facility is consistently of the best quality.

Engineered using premium-grade polypropylene

Gopani has the widest range of melt blown cartridge filters designed to solve a wide array of filtration problems. All the filters are thermally moulded and developed using cutting edge fiber technology to deliver high performance and long service life.

Difference between a regular spun cartridge filters and Gopani’s pp melt blown cartridge filters

The regular melt blown cartridge filters may experience media migration. If not prewashed they can also cause foaming issues. Gopani’s cartridge filters are pre-washed, and they are thermally moulded and developed using cutting edge fiber technology. The layered gradient structure not only imparts higher filtration capabilities and thermal stability but also last remarkably longer compared to the regular run of the mill products. All materials used to construct the cartridge filters are FDA compliant and we have different variants that work well for corrosive liquids, chemicals, some acids and alkaline liquids.

 

Industries we serve!

How to Select the Right Meltblown Cartridge Filter

Follow these 5 steps to choose the optimal RO Protect meltblown cartridge for your filtration application

1. Identify Your Particle Size Target

Determine the particle size you need to remove from your process fluid. This defines the micron rating needed. For RO membrane pre-filtration, 5 micron is standard. For pharmaceutical water, 0.5 or 1 micron may be required. For general industrial pre-filtration, 10 to 25 micron is typical. If unsure, Gopani can perform a filtration analysis of your process fluid sample.

2. Evaluate Operating Conditions

Assess your process fluid temperature, chemical composition, and pH level. Polypropylene meltblown cartridges operate up to 60 to 80 degrees C depending on the variant. For temperatures above 80 degrees C, consider alternative media. For aggressive chemicals, verify PP compatibility. The RO Protect Eco and Extreme variants handle up to 80 degrees C; the Eco Plus is rated to 60 degrees C.

3. Determine Flow Rate and Housing Configuration

Calculate the required flow rate to select the correct cartridge length and quantity. Standard lengths are 10, 20, 30, and 40 inches. Higher flow rates require longer cartridges or multi-cartridge housings. A general guideline for meltblown cartridges is 3 to 5 GPM per 10-inch element for water applications. Gopani's filtration engineers can help size your system for optimal performance.

4. Select the Right End Fitting

Match the end fitting configuration to your filter housing. Common options include DOE (Double Open End) for standard housings, 222 flat or fin for Code 7 connections, and 226 flat or fin for bayonet-style housings. The RO Protect Ultra uses DOE fittings, while the Eco Plus and Extreme variants offer up to 7 different end fitting options for maximum housing compatibility.

5. Choose Your Product Variant

Based on the above factors, select from Gopani's 5 meltblown cartridge variants: Ultra (best value, widest micron range), Eco (cost-effective DOE solution up to 80 degrees C), Eco Plus (2X dirt capacity with 7 end fittings), Prime (premium performance), or Extreme (FDA-grade, 0.5 micron, weld-free for pharma and food applications). Contact Gopani for a personalized recommendation.

Why Choose Gopani?

Who we are

  • India’s leading meltblown filter cartridge manufacturer with proprietary graded-density extrusion technology
  • ISO 9001:2015 certified manufacturing facility in Ahmedabad, Gujarat
  • 30+ years of filtration expertise since 1993, exporting to 30+ countries
  • 5 distinct meltblown cartridge variants engineered for specific industrial demands
  • FDA 21 CFR 177 compliant options for food, beverage, and pharma applications

What we do

  • Manufacture all 5 meltblown variants in-house using virgin polypropylene resin, no binders, no surfactants
  • Maintain large ready-stock inventory for immediate dispatch across India and international markets
  • Provide free cross-reference assistance: send us your Pall, Parker, or 3M part number and get the Gopani equivalent
  • Offer technical support from our filtration engineers to select the right variant, micron, and end fitting
  • Test every production batch: bubble point, differential pressure, and filtration efficiency validation
  • Supply pilot-scale trial quantities before bulk commitment

Order your batch of the finest quality
Melt Blown Filter Cartridges!

Order Now

FAQs

What is a meltblown filter cartridge?
A meltblown filter cartridge is a depth filter made from polypropylene (PP) resin that is extruded through fine nozzles and drawn by high-velocity hot air to create microfibers. These fibers are thermally bonded (not chemically bonded) to form a self-supporting cartridge with no binders, adhesives, or surfactants. The result is a true depth filtration element with a graded-density structure that captures particles throughout its entire cross-section, providing higher dirt holding capacity than surface filters.
Meltblown cartridge filters are depth filters that capture particles throughout the entire filter wall thickness using a graded-density PP fiber matrix, while pleated cartridge filters are surface filters that capture particles on the outer membrane surface. Meltblown cartridges offer higher dirt holding capacity at lower cost and are ideal for pre-filtration and general process filtration. Pleated cartridges provide absolute micron ratings with sharper cutoffs and are used for critical final filtration. Many systems use meltblown cartridges as pre-filters to protect downstream pleated elements.
Gopani RO Protect meltblown filter cartridges are available in micron ratings ranging from 0.5 micron to 25 micron. Standard ratings include 0.5, 1, 5, 10, and 25 micron depending on the product variant. The RO Protect Ultra offers the widest range (1 to 25 micron), while the RO Protect Extreme provides the finest filtration at 0.5 micron. Each rating is designed for specific applications, from coarse pre-filtration to fine particle removal in process-critical systems.
PP spun (meltblown polypropylene) filter cartridges are used across a wide range of industries including water treatment and RO pre-filtration, pharmaceuticals and biotechnology, food and beverage processing, chemicals and petrochemicals, electronics and semiconductor manufacturing, and power generation. They are especially valued in applications where chemical compatibility, thermal stability, and absence of binders or surfactants are critical requirements.
Selecting the right meltblown cartridge filter depends on four key factors: (1) Particle size to be removed, which determines the micron rating; (2) Operating temperature and chemical compatibility of the process fluid; (3) Required flow rate, which determines cartridge length and quantity; and (4) End fitting configuration to match your filter housing. Gopani offers 5 product variants (Ultra, Eco, Eco Plus, Prime, and Extreme) to match different application requirements. Contact Gopani's filtration engineers for application-specific recommendations.
Graded-density filtration is an advanced meltblown construction technique where the fiber density varies from the outer surface to the inner core. The outer layers have a more open structure to capture larger particles, while the inner layers progressively become denser to trap finer particles. This creates multiple filtration zones within a single cartridge, resulting in significantly higher dirt holding capacity and longer service life compared to uniform-density meltblown cartridges. All Gopani RO Protect meltblown cartridges feature true graded-density construction.
Yes, select Gopani RO Protect meltblown filter cartridges are manufactured from FDA-compliant polypropylene materials conforming to 21 CFR 177. The RO Protect Extreme variant is specifically designed for food, beverage, and pharmaceutical applications with FDA-grade materials and weld-free construction that eliminates any risk of contamination from adhesives or bonding agents. All cartridges are manufactured in an ISO 9001:2015 certified facility.
The maximum operating temperature for Gopani RO Protect meltblown cartridge filters varies by product variant. The RO Protect Eco and RO Protect Extreme support continuous operation up to 80 degrees C, while the RO Protect Eco Plus is rated for up to 60 degrees C. For higher temperature applications, Gopani recommends evaluating the specific chemical environment alongside temperature requirements to select the optimal cartridge variant.
Yes, Gopani RO Protect meltblown cartridge filters are engineered as direct replacements for major international brands including Pall, Parker, Graver, and 3M Cuno. Gopani provides a comprehensive cross-reference guide to match equivalent models. For example, Gopani cartridges can replace Pall Profile series, Parker Fulflo series, and 3M Cuno Micro-Klean series with equivalent or superior filtration performance. Contact Gopani for a detailed cross-reference recommendation for your specific application.
Gopani RO Protect meltblown cartridge filters are available with multiple end fitting configurations to fit all standard filter housings. Options include DOE (Double Open End), 222 flat, 222 fin, 226 flat, 226 fin, and other industry-standard configurations. The RO Protect Ultra is available in DOE configuration, while the RO Protect Eco Plus and Extreme variants offer up to 7 different end fitting options. Standard cartridge lengths include 10 inch, 20 inch, 30 inch, and 40 inch to match all common housing sizes.