How to choose between bag filter and V-type filter?

1. Structural and Performance Differences

A bag filter consists of multiple flexible filter pockets. By increasing the number and depth of pockets, the effective filtration area can be expanded. It features a simple structure, various configurations, high dust holding capacity, and convenient replacement. Due to its relatively low initial cost, it is widely used in conventional AHUs, commercial buildings, and industrial ventilation systems.

A V-bank filter uses multiple V-shaped pleated filter modules to install more filter media within a limited space. It features a compact structure, higher rigidity, and large airflow capacity, making it suitable for HVAC systems with limited installation space or continuous operation requirements.

2. Why Are V-Bank Filters Suitable for High-Airflow Systems?

Large AHU systems often need to handle high airflow within limited installation space.

If the filtration area is insufficient, it may cause:

Higher Air Velocity → Higher Pressure Drop → Higher Fan Load → Increased Energy Consumption

A V-bank filter increases effective filtration area through multiple pleated modules, allowing higher airflow performance in a compact structure.

It is commonly used in:

• High airflow AHU systems;

• Data center HVAC systems;

• Hospital air handling systems;

• Pharmaceutical cleanrooms;

• Electronics manufacturing facilities;

• Industrial HVAC systems with continuous operation.

3. How Does Pressure Drop Affect Operating Cost?

The purchase price of a filter is only an initial investment, while fan energy consumption affects the entire service life.

Higher pressure drop means:

Higher Pressure Loss → Higher Fan Power → Higher Operating Cost

Therefore, buyers should evaluate:

• Rated airflow;

• Initial pressure drop;

• Effective filtration area;

• Dust holding capacity;

• Final pressure drop;

• Replacement interval.

4. How to Evaluate Dust Holding Capacity and Service Life?

Bag filters improve dust holding capacity by increasing:

• Number of pockets;

• Pocket depth;

• Filtration area.

V-bank filters increase effective filtration area through densely pleated filter media.

However, it is incorrect to assume that a V-bank filter always has a longer service life than a bag filter.

Actual service life depends on:

• Inlet dust concentration;

• Performance of pre-filters;

• Actual airflow;

• Air humidity;

• Operating hours;

• Final pressure drop setting.

5. How to Select the Right Filter for Different Applications?

Commercial Buildings

For office buildings, hotels, and shopping centers with moderate airflow requirements, bag filters are usually a more economical choice when AHU space is sufficient.

Industrial Ventilation

For environments with higher dust loading, bag filters with larger filtration areas and higher dust holding capacity can be considered.

High-Airflow Systems

When installation space is limited but high airflow is required, V-bank filters are more suitable due to their compact structure and large filtration area.

Cleanroom HVAC Systems

When used as pre-filters for HEPA systems, both bag filters and V-bank filters can be applied. Selection should consider:

• Filtration efficiency;

• Airflow requirement;

• Pressure drop;

• Protection of downstream HEPA filters.

6. Procurement Considerations

Some projects still use traditional classifications such as:

• F5;

• F6;

• F7;

• F8;

• F9.

New projects may adopt ISO 16890 classifications:

• ePM1;

• ePM2.5;

• ePM10.

Traditional filter grades cannot be directly converted into ISO 16890 classifications.

For export projects, buyers should confirm:

Filtration Standard + Test Report + Rated Airflow + Initial Pressure Drop

Providing only dimensions such as:

592×592×292 mm

is not sufficient for accurate selection.

The following information should also be provided:

• Application environment;

• System airflow;

• Installation space;

• Dust loading;

• Operating hours.

7. Jiangsu Yueboyang Filtration Solutions

Jiangsu Yueboyang provides bag filters, V-bank filters, and high airflow filtration solutions for:

• Commercial HVAC systems;

• Industrial ventilation;

• Cleanrooms;

• Large AHU systems.

Based on project requirements, we provide:

• Filtration efficiency matching;

• Airflow calculation;

• Pressure drop evaluation;

• Customized dimensions;

• Performance testing.