A micron (or micrometre) is a unit of measurement equal to one-millionth of a meter. A 1 micron filter bag has pores
sized to capture particles as small as 1 micron. To put this in perspective,
that's about 1/70th the width of a human hair. The micron rating indicates the
smallest particle size the filter can effectively trap.

Here's a helpful comparison:

• Human hair: 70-100 microns
• Fine dust and silt: 1-5 microns
• Bacteria: 0.2-2 microns
• Red blood cells: 6-8 microns
• Pollen: 10-1000 microns A 1 micron filter sits right at the threshold for capturing most bacteria and very fine particles that are invisible to the naked eye.

1 micron filter bags effectively remove:

• Some bacteria
• Fine sediment and silt
• Rust particles
• Some parasitic cysts (Giardia, Cryptosporidium)
• Very fine dirt and debris
• Asbestos fibers
• Some algae and microorganisms

Nominal rating means the filter removes a
percentage (typically anywhere up to 95%) of particles at the stated micron size. Absolute rating means the filter removes 99.9% or more of particles at that size. Most bag filters use nominal ratings, so a "1 micron" bag may allow some particles smaller than 1 micron to pass through.

Yes, 1 micron filter bags can capture some
bacteria and parasites. Most bacteria range from 0.2-2 microns, so a 1
micron filter will trap the larger bacteria. However, for guaranteed removal of all bacteria, you'd need a 0.1-0.2 micron absolute-rated membrane filter.

Most 1 micron filter bags have a nominal
rating of 85-95% efficiency, meaning they capture 85-95% of particles at 1
micron size. The efficiency increases for larger particles, often reaching 99%+
for particles above 5 microns. However, this varies by application.

No, 1 micron filter bags cannot reliably
remove viruses. Viruses are much smaller, typically 0.01-0.3 microns. For virus
removal, you need ultrafiltration (0.001-0.01 micron) or other treatment
methods.

No, standard 1 micron filter bags do not
remove chlorine or dissolved chemicals. They are designed for physical
filtration of particles, not chemical absorption. For chlorine removal, you
need activated carbon filters. For comprehensive chemical removal, consider
reverse osmosis or specialised chemical filtration systems.

1 micron filter bags have much smaller pores than larger micron filters, so they trap many more particles. This increased
particle capture leads to faster accumulation of debris, which blocks the pores and reduces flow. The finer the filtration, the more quickly the filter will
load up with contaminants.

• Use a pre-filter (5-10 micron) to remove larger particles first
• Ensure proper system sizing for your flow rate requirements
• Monitor and replace filters based on pressure differential, not just time
• Consider using multiple stages of filtration
• Clean or backwash upstream components regularly
• Size your filter bag housing appropriately for your application
• Check if your pump is powerful enough

Reduced flow is typically caused by:

• Filter loading (accumulated particles blocking pores)
• Undersized filter housing for the flow rate
• High differential pressure across the filter
• Damaged or improperly installed filter bag
• Upstream system issues affecting pressure
• Wrong filter material for the application

Yes, using a pre-filter (typically 5-25
microns) is highly recommended. Pre-filtration removes larger particles that
would otherwise quickly clog your 1 micron filter, extending its lifespan and
maintaining better flow rates. This staged approach is more cost-effective and
efficient.

Replacement frequency depends on:

• Water quality and contamination levels
• Flow rate and usage volume
• System pressure differential
• Application requirements

Generally, replace when pressure differential pressure reaches 1 bar above initial readings, or every 3 months. Some Industrial applications may require more frequent changes based on contamination load.

Replace your filter bag when you notice:

• Significant decrease in water flow rate
• Increased pressure differential - above 1 bar
• Visible damage to the bag material
• Water quality deterioration
• Foul odors or tastes
• Discoloration or visible debris accumulation
• Reaching manufacturer's recommended service life

Some 1 micron Nylon mesh filter bags can be cleaned and reused. However:

• Cleaning effectiveness diminishes with each use
• Filter efficiency may be reduced after cleaning
• Not all bag materials are suitable for reuse
• Single-use bags are often more cost-effective for consistent performance Check manufacturer specifications for your specific filter bag type.

• Monitor pressure differential regularly
• Replace bags according to schedule or pressure readings
• Inspect housing and seals during bag changes
• Clean filter housing when replacing bags
• Keep spare filter bags in stock
• Document replacement dates and system performance
• Check upstream components for proper operation
• Follow manufacturer's maintenance guidelines

Use this text to answer questions in as much detail as possible for your customers.

Choice depends on your application:

Bag filters are better for:

• High flow rate applications
• Cost-effective filtration
• Easy installation and replacement
• Industrial and commercial use
• Applications with variable particle loads

Cartridge filters are better for:

• Higher filtration efficiency requirements
• Longer service life needs
• Space-constrained installations
• Consistent, predictable contamination levels

• 1 micron: Captures very fine sediment, provides higher purity but clogs faster (in the absence of prefiltration), costs more
• 5 micron: Captures larger sediment, dirt, some better flow rates, longer service life, more economical

Choose 1 micron for critical applications
requiring high purity; choose 5 micron for general sediment removal and longer
filter life.

1 micron is better if you need:

• Very fine sediment removal
• High water clarity
• Protection of sensitive downstream equipment

10 micron is better if you need:

• Basic sediment removal
• Higher flow rates
• Longer filter life
• More economical operation
• Pre-filtration applications

Common materials include:

• Polypropylene (PP): Excellent chemical resistance, cost-effective, good for general use
• Polyester (PE): High temperature tolerance, good chemical resistance, durable
• Nylon: Strong, reusable, good for food and beverage applications
• PTFE: Superior chemical resistance, high-temperature applications (On special order)
• Nomex: High-temperature resistance for specialised applications (On special order)

Polypropylene is better for:

• Chemical processing
• Cost-sensitive applications
• Broad chemical compatibility
• General water treatment

Polyester is better for:

• High-temperature applications
• Industrial processes with thermal cycling

Felt bags:

• Depth filtration (particles trapped throughout the material)
• Higher dirt-holding capacity
• Better for variable particle sizes
• Thicker construction

Mesh bags:

• Surface filtration (particles trapped on the surface)
• Higher flow rates
• Easier to clean and reuse
• Thinner, more uniform construction
• Better for consistent particle sizes

Yes, common ring types include:

• Polypropylene collars: Chemical resistant, cost-effective
• Stainless steel rings: High strength, food grade, high temperature
• Carbon steel rings: Standard industrial use
• Plastic rings: Lightweight, corrosion resistant

Choose ring material based on your
application's chemical compatibility, temperature, and strength requirements.

1 micron filter bags can improve drinking
water quality by removing sediment, some bacteria, and fine particles. However,
they should be part of a comprehensive treatment system that may include:

• Pre-filtration for larger particles
• Carbon filtration for chlorine and taste
• UV or chemical disinfection for complete microbial safety
• Post-filtration for final polishing

All Polypropylene, Nylon and Polyester filter bags supplied by CLARIBag are food grade.

Yes, our 1 micron filter bags have been engineered for industrial applications including:

• Chemical processing
• Paint and coating filtration
• Oil and coolant filtration
• Process water treatment
• Product purification
• Equipment protection

Choose appropriate materials based on chemical compatibility and operating conditions.

Yes, our 1 micron filter bags are food safe and comply with EU regulation EC1935/2004. In addition, the bags are individually wrapped to avoid contamination. All filter bags are traceable.

1 micron filter bags work best with:

• Moderately contaminated water with fine particles
• Applications needing high clarity
• Systems with adequate pre-filtration
• Moderate to low turbidity water

They may not be suitable for highly turbid
water without pre-treatment or applications requiring virus removal.

Common housing sizes for filter bags:

• Size #1: 7" diameter x 16" length
• Size #2: 7" diameter x 32" length
• Size #3: 4" diameter x 9" length
• Size #4: 4" diameter x 15" length

Choose housing size based on your flow rate requirements and available space.

All CLARIBag filter bags are designed to fit standard industrial housings for 7" or 4" diameter filter bags.

Installation steps:

1. Follow instructions for bag filter housing operation by the manufacturer (do not open pressurised vessels without instructions supplied by the housing manufacturer)
2. Remove old filter bag if replacing
3. Clean housing interior
4. Insert new bag ensuring ring sits properly in housing groove
5. Check for proper sealing around ring

Yes, if your current system uses standard 4" or 7" diameter bag filters, you can typically retrofit with 1 micron bags. Consider:

• Current housing compatibility
• System pressure and flow requirements
• Pump capacity for increased pressure drop
• Pre-filtration needs
• More frequent maintenance requirements

You may need to adjust system operation for the finer filtration level.

1 micron filter bags cost more because:

• More precise manufacturing requirements
• Specialized materials needed for fine filtration
• Higher quality control standards
• More complex production processes
• Lower production volumes compared to standard filters
• Premium materials required for consistent performance

Initial cost: Moderate (less than cartridges, more than basic bags)

Operating cost: Moderate (frequent replacement offset by effective filtration)

Maintenance: Low complexity, easy replacement

Performance: Good balance of efficiency and flow

Compared to cartridge filters: Lower initial cost, similar operating costs

Compared to membrane systems: Much lower cost, less complex maintenance

Consider these factors:

• Filter cost: £X per bag
• Replacement frequency
• Labor costs: Minimal for bag replacement
• System protection: Reduced downstream maintenance costs
• Energy costs: Moderate pressure drop impact
• Water quality improvement: Value of better product quality

Calculate total cost of ownership including
all factors for your specific application.

Not necessarily. Quality differences include:

• Material consistency: Cheaper bags may have variable pore sizes
• Construction quality: Sealing and durability issues
• Actual micron rating: May not meet specifications
• Service life: Shorter lifespan increases total cost
• Performance consistency: Variable filtration efficiency

Invest in quality bags from reputable
manufacturers for reliable performance and lower total cost of ownership.

Possible causes:

• Bypass around the filter (poor sealing)
• Wrong micron rating for your particles
• Particles smaller than 1 micron
• Damaged filter bag

Immediate actions:

1. Stop system operation to prevent contamination
2. Replace damaged bag immediately
3. Inspect housing for damage that may have caused tearing
4. Check installation procedure for proper technique
5. Review system operating conditions (pressure, temperature)
6. Check differential pressure
7. Consider if bag material is appropriate for application
8. Document failure for warranty or pattern analysis

Testing methods:

• Visual inspection: Compare filtered vs. unfiltered water clarity
• Pressure monitoring: Track pressure differential across filter
• Particle counting: Professional testing for particle concentration
• Turbidity testing: Measure water cloudiness before and after
• Flow rate monitoring: Declining flow indicates filter loading
• Regular water quality testing: Monitor key parameters over time