How To Choose A Bag Filter

Today we’re going to talk about how to select the super popular stainless steel bag filterin the industrial sector! Whether in the chemical, food, or pharmaceutical industry, choosing the right filter directly determines production efficiency and quality—blindly picking one is a big no-no!

Why Choose a Stainless Steel Bag Filter?

Durable and Sturdy: Made of 316L stainless steel, it is corrosion-resistant and high-temperature resistant, standing up to even the harshest workshop conditions!

Cost-effective Solution: Filter bags are replaceable, with a cost N times lower than filter cartridges. It’s truly a great value for long-term use!

High-efficiency Filtration: Filtration precision ranges from 1 to 200 microns, capable of “removing” all particles and impurities in one go!

5 Key Points for Selection

1. How to Determine Filtration Precision?

It depends on the size of impurities you want to capture! For example, 5–25 microns is commonly used in the food industry, while the chemical industry may require finer precision. Remember: the higher the precision, the lower the flow rate may be—don’t blindly pursue ultra-high precision!

 2. Calculate the Flow Rate Accurately!

Formula: Flow Rate (T/H) = Processing Capacity ÷ Filtration 

TimeIt is recommended to leave a 20% margin for actual selection to avoid operation failures caused by insufficient capacity!

 3. Avoid Mistakes in Material Selection!

 Ordinary acid-alkali environments: 304 stainless steel is sufficient.

High-corrosion scenarios (e.g., seawater, strong acids): Go straight for 316L stainless steel. It’s pricier but worry-free!

4. Is the Interface Size Compatible?

The inlet and outlet diameters must match the pipeline! Common sizes range from DN25 to DN150. You’ll be frustrated if you buy the wrong size that can’t be installed.

5. Select the Operation Mode According to Needs!

 Manual type: Ideal for low budgets and small flow rates.

Automatic type: A no-brainer for frequent cleaning or large-scale systems—it saves you tons of effort!

Details That 90% of People Overlook!

Filter Bag Material: Polyester, nylon, PP, etc.—different materials have varying chemical resistance. Check the chemical compatibility chart in advance!

Pressure Range: The rated pressure must be higher than the maximum system pressure—safety first!

Drainage Design: Side drain or bottom drain? Decide based on installation space to avoid last-minute troubles!

Warning: Avoid These Pitfalls!

⚠ Always rinse new filter bags before use to prevent material contamination during initial operation!

⚠ A red-line reading on the differential pressure gauge means it’s time to replace the filter bag—don’t wait until a system breakdown occurs!

⚠ Inspect the sealing ring regularly. Leakage will ruin all your previous efforts!