Liquid Filter Bags Industrial Bag Filters for Process Liquid Filtration

Rowe Equipment specializes in liquid filter bags – high-quality bag filters designed for efficient removal of contaminants, particulates, and debris from process liquids across industrial applications. Our liquid filter bags deliver reliable depth and surface filtration in standard sizes and micron ratings to protect equipment, improve product quality, and ensure consistent process performance.

With over 25 years of experience in filtration for polymer processing, recycling, film production, compounding, and food industries, Rowe Equipment provides liquid filter bags built to OEM specifications in a complete range of materials, sizes, and micron ratings. From coarse particulate removal to fine filtration, our bag filters offer an economical and effective solution for your liquid filtration needs – with same-day shipping available to minimize production downtime.

Our Products

Liquid Filter Bag Types & Materials

Polyester Felt Filter Bags

Non-woven polyester felt providing excellent depth filtration for general-purpose applications. 1-200 micron ratings, higher temperature resistance up to 300°F, good chemical compatibility for water, oils, and process streams.

Polypropylene Felt Filter Bags

Superior chemical resistance for aggressive liquids, acids, and caustics. 0.5-200 micron ratings, FDA compliant for food contact, excellent dirt-holding capacity for economical filtration.

Nylon Monofilament Mesh Filter Bags

Precision-woven nylon mesh providing accurate surface filtration with defined aperture sizes. 1-1500 micron ratings, excellent cleanability and reusability, FDA approved for food contact.

Nomex® High-Temperature Filter Bags

Aramid fiber felt designed for high-temperature liquid filtration up to 400°F. Ideal for hot oil filtration, thermal fluid systems, excellent dimensional stability and thermal resistance.

Oil Absorption Filter Bags

Multi-layer polypropylene construction designed to remove both particulates and free oils from water and aqueous streams. Ideal for coolant filtration, parts washing, wastewater treatment.

High-Efficiency Microfiber Filter Bags

Multi-layer microfiber construction with graded-density filtration up to 99.98% efficiency. Significantly higher dirt-holding capacity for longer service life and lower total filtration costs.

Industries Served by Liquid Filter Bags

Liquid Filter Bag Applications

Selection Guide

Key factors to consider when specifying liquid filter bags for your application:

Bag Size:
Match bag dimensions to your filter housing. Standard sizes (#1, #2, #3, #4) fit industry-standard housings
Micron Rating:
Select filtration efficiency based on particle sizes to be removed. Coarser ratings (50-200 micron) for sediment; finer ratings (1-25 micron) for critical clarification
Filter Media:
Choose based on chemical compatibility and temperature requirements. Polypropylene for chemical resistance; polyester for higher temperatures; nylon mesh for cleanability
Ring/Collar Type:
Match ring configuration to your housing design. Steel rings for standard housings; plastic rings for chemical applications; snap rings for positive-seal housings
Flow Rate & Pressure:
Consider system flow rate and allowable pressure drop. Larger bags and coarser micron ratings provide higher flow capacity
Regulatory Requirements:
For food, beverage, and pharmaceutical applications, specify FDA-compliant materials that meet CFR21 Section 177.1520 requirements

Frequently Asked Questions

What is the difference between nominal and absolute micron ratings?

Nominal ratings indicate the filter removes 50-80% of particles at the specified size in a single pass – most felt filter bags use nominal ratings. Absolute ratings mean the filter captures 98%+ of particles at the rated size. Absolute-rated bags (typically microfiber or mesh) cost more but provide more predictable filtration for critical applications. Our micron rating guide can help you select the appropriate rating for your needs.

How do I know when to change a liquid filter bag?

Monitor differential pressure across the filter housing. Clean bags typically show 1-2 PSI pressure drop; replacement is recommended at 15 PSI differential. Reduced flow rate, visible bag loading, or breakthrough of contaminants also indicate change is needed. Establishing a regular change schedule based on experience helps prevent unplanned shutdowns. Our filter change interval calculator can help you determine optimal replacement frequency.

Can liquid filter bags be cleaned and reused?

Felt bags are generally single-use disposable items – cleaning is rarely cost-effective and can compromise filtration integrity. Nylon mesh bags can often be cleaned and reused for coarse filtration applications. Wash with compatible solvents or detergents and inspect for damage before reuse. For critical applications, new bags are always recommended to maintain consistent filtration performance.

What filter bag material should I use for chemical applications?

Polypropylene felt offers broad chemical resistance to acids, bases, and many solvents – it’s the go-to choice for aggressive liquids. Polyester provides better temperature resistance but less chemical compatibility. For specific chemical compatibility questions, consult chemical resistance charts or use our chemical compatibility checker tool. Our technical team can also assist with your exact process conditions.

What bags are approved for food and beverage filtration?

Polypropylene and nylon filter bags are FDA compliant for food contact under CFR21, Section 177.1520. Polyester bags with proper certification are also available for food applications. Specify FDA-compliant materials when ordering for food, beverage, or pharmaceutical applications to ensure regulatory compliance. Our FDA compliance checker can help you identify appropriate options.

Do you offer custom liquid filter bags?

Yes, Rowe Equipment can design and manufacture custom liquid filter bags to meet specialized operational requirements. Non-standard dimensions, special materials, unique ring configurations, and OEM-specific designs are available. Contact our technical team with your specifications for custom filter bag solutions and we’ll work with you to develop the optimal filtration solution.

AI-Powered Tools & Calculators

Leverage our intelligent tools to select the optimal liquid filter bags, ensure proper sizing, and maximize filtration efficiency for your specific applications.

Liquid Filter Bag Selector

Guided wizard recommends optimal filter bag based on application type, liquid being filtered, contaminant size, temperature, chemical compatibility, and flow rate requirements.

Micron Rating Guide

Interactive visual tool showing particle sizes of common contaminants and matching micron ratings. Explains nominal vs. absolute ratings for appropriate filtration level selection.

Chemical Compatibility Checker

Database-driven tool to check compatibility with different filter media (polyester, polypropylene, nylon, Nomex). Recommends best material for your application.

Filter Bag Size Calculator

Determine correct bag size based on filter housing dimensions or flow rate requirements. Converts between standard sizes with dimensional specifications.

Filter Change Interval Calculator

Estimate optimal filter bag change frequency based on flow rate, contaminant loading, bag size, and differential pressure thresholds with maintenance schedule output.

Bag Filter Cost Comparison Tool

Compare total cost of ownership between standard felt, high-efficiency, and mesh filter bags. Factors in bag cost, change frequency, and dirt capacity for true filtration costs.

FDA Compliance Checker

Identify FDA-compliant filter bag options for food, beverage, and pharmaceutical applications. Verify CFR21 compliance and generate regulatory documentation.

Liquid Filter Bag Quick Quote Tool

Streamlined quote request form with smart fields that adapt based on bag type and application. Includes quantity breaks, sample request option, and urgency indicators.

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