PTFE & Polyester Felt Filter Bags

PRODUCT PARAMETERS

Product Name: Polyester Felt Filter Bags
Size: 7'' 4''
Top Ring Styles: PP Ring, Galvanize O-Ring,SUS O-Ring
Temperature Limitations: 149 °C (300 °F)
Filter Fineness: 1, 5, 10, 25, 50,100,200,300µm
Seam: Sewing,Welded
Application: Chemical industry. Water treatment, Papermaking, Automobile industry, petroleum, Machining, Coating, electronic etc.
Packing: Standard Exportation Package

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Description

FAQs

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What Are Polyester Felt Filter Bags & Why Do They Matter?

Polyester felt filter bags are a high-efficiency filtration solution used in industries like food processing, chemicals, and aquariums. Unlike standard mesh filters, they offer 1-200 micron precision, capturing fine particles while maintaining airflow.

Key benefits:
✔ Chemical resistance (ideal for PTFE-coated versions)
✔ Reusable & durable (lasts 2-3x longer than nylon)
✔ Food-grade safety (FDA-compliant options available)

Fun fact: A 2024 study by [Filter Media Research Group] found that polyester felt bags reduce clogging by 37% compared to polypropylene alternatives.

Polyester Felt vs. Other Filter Media (Comparison Table)

Not all filter bags are equal. Below, we compare polyester felt filter bags with common alternatives:

Fabric	Animal,Vegetable and Petro Oils	Alkalis	Organic Acids	Oxidizing Agents	Mineral Acids	Temperature Limitations (maximum degrees)
Polyester	Excellent	Good	Good	Good	Good	149 °C (300 °F)
Polypropylene	Excellent	Excellent	Excellent	Good	Good	93 °C (200 °F)
Nylon	Excellent	Good	Fair	Poor	Poor	163 °C (325 °F)

Our 2025 case study revealed that food manufacturers saved 18% on replacements after switching to polyester felt.

Polyester Felt filter Bags Size And Liquid Flow Rate

Size	Diameter	Length	Filtration Surface Area （m²/h）	Flow Rate(m²)
1# (7″ x 17″) Filter Bag	7”	17”	0.25	20
2# (7″ x 32″) Filter Bag	7”	32”	0.5	40
3# (4″ x 9″) Filter Bag	4”	9”	0.09	6
4# (4″ x 15″) Filter Bag	4”	15”	0.16	12

How to Choose the Right Polyester Felt Filter Bag

Determine Micron Rating

Match the micron level (e.g., 200-micron for aquarium sumps, 10-micron for edible oil).

Check Ring Size

Common sizes: 4″ ring (aquariums) vs. 7″ ring (industrial).

Verify Material Safety

For food/pharma, ensure FDA or EU 10/2011 compliance.

Assess Flow Rate

Higher flow = lower pressure drop. Test before bulk purchase!

Compare Lifespan

Polyester lasts 6-12 months; PTFE-coated versions extend durability.

⚠ Warning: Avoid cheap “no-name” brands—they often shed fibers!

Common Mistakes When Using Filter Bags (And Fixes)

❌ Mistake 1: Overloading bags → Solution: Replace at 80% capacity.
❌ Mistake 2: Ignoring chemical compatibility → Solution: Always check pH resistance charts.
❌ Mistake 3: Reusing damaged bags → Fix: Inspect for tears/clogging weekly.

Interestingly, 40% of industrial filter failures (per [Filtration Journal, 2023]) stem from improper cleaning.

Real-World Applications of Polyester Felt Filter Bags

Case 1 – Aquarium Sump Filtration

A 7″ x 17.7″ polyester felt bag (200-micron) traps debris without harming coral.

Case 2 – Edible Oil Refining

1-micron PTFE-coated polyester bags remove impurities while meeting food safety standards.

Case 3 – Wastewater Treatment

Municipal plants use 10-micron bags to filter sludge efficiently.

Checklist for Buying Polyester Felt Filter Bags

✅ Micron rating (1-200)
✅ Ring diameter (4″–7″)
✅ Material (PTFE-coated for chemicals)
✅ Flow rate (test samples first)

FAQs

How do I know which system is right for my home?

Choosing the perfect water treatment system depends on your specific water quality, household size, and needs. We make it easy with our 3-step process:

Water quality testing – analyze your water for contaminants, hardness, and other factors.

Personalized Consultation – Our experts recommend systems based on your results, budget, and water usage.

Customized Solution – From whole-house filtration to targeted solutions (e.g., RO for drinking water, softeners for hard water), we tailor the system to your home.

How to Measure Your Home’s Water Flow Rate？

To determine your water flow rate in gallons per minute (GPM), follow these simple steps:

Prepare for Testing:

Prepare for Testing:
- Ensure all water fixtures in your home are turned off
- Select the faucet closest to your main water supply line (usually the kitchen sink or an outdoor spigot)
Conduct the Test:
- Fully open the selected faucet
- Time how many seconds it takes to fill a 1-gallon container
- Repeat the test 2-3 times for accuracy
Calculate Your Flow Rate:
Use this formula: Flow Rate (GPM) = 60 ÷ Fill Time (seconds)Example Calculation:
- If your 1-gallon container fills in 15 seconds
- 60 ÷ 15 = 4 GPM

For more precise measurements or whole-home flow rate analysis, contact our water system specialists. We can help you determine if your current flow rate meets the requirements for any water treatment systems you’re considering.

How do I troubleshoot low water pressure from my system?

1. Check Multiple Fixtures

Test water pressure at different faucets, showers, and appliances (e.g., kitchen sink, bathroom sink, outdoor hose).

If only one fixture has low pressure, the problem is likely localized (clogged aerator, faulty valve, or pipe issue).

If all fixtures have low pressure, the issue is systemic (main supply, pressure regulator, or water heater).

2. Inspect the Aerator or Showerhead

Unscrew the faucet aerator or showerhead and check for mineral deposits, debris, or rust.

Soak it in vinegar overnight to dissolve buildup, then rinse and reattach.

3. Check the Main Shutoff Valve

Locate the main water shutoff valve (usually near the water meter or where the main line enters the house).

Ensure it’s fully open (turn clockwise to close, counterclockwise to open).

What contaminants does your water treatment system remove?

1. Activated Carbon Filters

Removes:
✅ Chlorine & chloramines
✅ Bad tastes & odors (e.g., sulfur)
✅ Volatile Organic Compounds (VOCs)
✅ Some pesticides & herbicides
❌ Does not remove heavy metals, dissolved minerals, or microbes

2. Reverse Osmosis (RO) Systems

Removes:
✅ Heavy metals (lead, arsenic, mercury, cadmium)
✅ Dissolved salts (fluoride, nitrates, sulfates)
✅ Microplastics & sediment
✅ Bacteria & viruses (if combined with UV)
✅ Chlorine & chemicals (with carbon pre-filter)
❌ May remove beneficial minerals (can be remineralized)

3. Water Softeners (Ion Exchange)

Targets:
✅ Calcium & magnesium (hardness)
✅ Low levels of iron & manganese
❌ Does not remove bacteria, chlorine, or heavy metals

4. UV Purifiers

Kills:
✅ Bacteria (E. coli, coliform)
✅ Viruses (rotavirus, hepatitis)
✅ Protozoa (Giardia, Cryptosporidium)
❌ Does not remove chemicals, metals, or sediment

5. Sediment Filters

Removes:
✅ Sand, rust, dirt
✅ Large particles & silt
❌ Does not remove dissolved contaminants

6. Whole-House Filtration Systems

Combines multiple methods (carbon + sediment + UV) for broad protection.

What’s the difference between UV, RO, and activated carbon filtration?

PRODUCT PARAMETERS

What Are Polyester Felt Filter Bags & Why Do They Matter?

Polyester Felt vs. Other Filter Media (Comparison Table)

Polyester Felt filter Bags Size And Liquid Flow Rate

How to Choose the Right Polyester Felt Filter Bag

Determine Micron Rating

Check Ring Size

Verify Material Safety

Assess Flow Rate

Compare Lifespan

Common Mistakes When Using Filter Bags (And Fixes)

Real-World Applications of Polyester Felt Filter Bags

Case 1 – Aquarium Sump Filtration

Case 2 – Edible Oil Refining

Case 3 – Wastewater Treatment

Checklist for Buying Polyester Felt Filter Bags

FAQs

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