QIYUE FAN · TECHNICAL ARTICLES
Baghouse Dust Collector Fan Selection: Static Pressure, Filter Resistance And Fan Position
Selecting a fan for a baghouse dust collector is not only about airflow. The fan must overcome duct resistance, the collector/filter pressure drop at the selected design loading condition, and outlet loss while maintaining stable capture airflow. Count the filter loss once: a total loaded-filter pressure drop already includes its clean-filter baseline; add a baseline only when the supplied value is explicitly an increment.
In This Guide
Selection Principle
Why Baghouse Fan Selection Must Start from System Resistance
In a baghouse dust collector system, the fan creates the airflow that pulls dust-laden air from capture points, through ducts and into the filter collector. If fan pressure is too low, capture velocity drops, dust escapes from the source, and the system cannot maintain stable exhaust performance.
The most common selection error is using only clean-filter resistance. As filter bags load with dust, the pressure drop increases. A practical baghouse fan selection should consider clean-filter condition, loaded-filter pressure drop, duct friction, elbows, dampers and final outlet loss. Calculate the required system airflow before confirming fan pressure →
01 · Airflow
Capture All Active Hoods
Total airflow must cover all capture hoods and simultaneous-use conditions.
Airflow Calculation →02 · Static Pressure
Complete Resistance Network
Include duct resistance, collector/filter loss at the selected loading condition, and outlet loss. Do not add a clean-filter baseline to a loaded-filter total.
03 · Dust Condition
Wear and Handling Risk
Dust type, particle size, hardness and concentration affect fan position and wear risk.
04 · Fan Position
Clean Side or Dust Side
Clean-side and dirty-side arrangements have different wear and leakage characteristics.
Pressure Review
What Should Be Included in Baghouse Fan Pressure?
For most baghouse systems, filter resistance is one of the dominant pressure losses. The fan should be checked against the complete resistance network, not against clean-filter data alone.
Swipe the table sideways to view all columns.
| Resistance Item | What It Means | Why It Matters |
|---|---|---|
| Capture hood loss | Pressure loss around hood or enclosure | Affects dust capture at the source |
| Duct resistance | Friction loss from duct length and diameter | Long ducts can significantly reduce airflow |
| Elbows and dampers | Local loss from turns, valves and branches | Complex layouts increase static-pressure demand |
| Baghouse filter resistance | Pressure drop through filter bags | Often the main resistance in a baghouse system |
| Loaded-filter pressure basis | Total loaded-filter loss, or an explicitly identified increment above the clean baseline | Use the design loading condition without double-counting the clean-filter baseline |
| Stack or outlet loss | Loss at discharge stack or final outlet | Should be included before final motor review |
Practical rule: Build the required pressure from the defined system losses at the design airflow: hood + ducts, branches and fittings + collector/filter loss at the selected design loading condition + outlet + agreed project allowance. Keep the pressure basis and system boundaries consistent with the fan curve.
Count filter pressure drop once: If the supplied loaded-filter value is the total pressure drop across the defined filter/collector boundary, use that total once; do not add clean-filter resistance again. If the supplier explicitly provides only the additional rise above a clean-filter baseline, combine that baseline with the stated increment once. Confirm which basis is supplied and which housing, inlet/outlet or other losses are already included before summing the system. Unknown losses require project data, not assumed values.
Count filter pressure drop once: If the supplied loaded-filter value is the total pressure drop across the defined filter/collector boundary, use that total once; do not add clean-filter resistance again. If the supplier explicitly provides only the additional rise above a clean-filter baseline, combine that baseline with the stated increment once. Confirm which basis is supplied and which housing, inlet/outlet or other losses are already included before summing the system. Unknown losses require project data, not assumed values.
Pressure Basis
Static Pressure vs Total Pressure
Confirm whether the project and fan curve use the same pressure definition.
Pressure Unknown
Static Pressure Unknown
Use duct, filter and resistance information when no final pressure value is available.
Operating Point
Fan Performance Curve
Check airflow and pressure together at the actual working point.
Fan Position
Clean-Side Fan or Dust-Laden Side Fan?
The fan may be installed before or after the baghouse, depending on system design. The correct arrangement should be reviewed by dust characteristics, wear risk, leakage direction and maintenance requirements.
Clean Side
Clean-Side Fan After Baghouse
The fan is installed after the baghouse filter, so cleaner air passes through the impeller. This arrangement usually reduces fan wear when filtration is effective.
• Lower particle exposure to the impeller
• Fan pressure must include full baghouse resistance
• Check residual dust and filter leakage condition
Dust Side
Dust-Laden Side Fan Before Baghouse
The fan handles dust-laden air before final filtration. This arrangement requires careful review of dust type, particle size, particle hardness, concentration and buildup risk.
• Fan directly contacts contaminated airflow
• Abrasive particles may increase impeller wear
• Pre-separation should be reviewed where possible
Abrasive dust note: Cement, mineral and grinding dust may require pre-separation and wear-protection review. Review cement and mineral dust applications →
Selection Path
How to Select a Baghouse Dust Collector Fan
Selection should be based on airflow and pressure at the same operating point. Motor power is confirmed after fan model, speed, efficiency and safety margin are reviewed. See Industrial Fan Power Calculation.
Fan Model Direction
Which QIYUE FAN Direction Can Be Reviewed?
Final fan selection depends on airflow, static pressure or total pressure, dust condition, fan position and motor standard. The following directions help buyers understand the preliminary review path.
Light Dust
C6-48 Dust Collection Fan
Can be reviewed for light dust, wood chips, fine fibers and similar loose particles after checking particle size and duct resistance.
View C6-48 Product →Higher Resistance
9-19 / 9-26 High Pressure Fan
May be reviewed for higher-resistance systems, long ducts, multiple elbows or operating points requiring higher static pressure.
View High Pressure Fan →Clean Side
General Centrifugal Fan Direction
A general centrifugal fan direction may only be reviewed when the air is suitably filtered and the remaining dust level is acceptable.
View Centrifugal Fans →Quotation Data
Information Needed Before Quotation
Complete project information helps QIYUE FAN review the suitable fan series, pressure, motor power, drive arrangement, outlet direction and installation configuration.
System & Dust Data
Performance and Medium
• Required airflow
• Static pressure or total pressure
• Baghouse type and filter resistance
• Loaded-filter pressure drop
• Dust type, concentration and particle size
• Temperature, moisture and stickiness
Installation & Motor Data
Installation and Electrical
• Duct length, diameter, elbows and branches
• Fan position before or after baghouse
• Outlet angle and rotation direction
• Motor voltage, frequency and phase
• Installation space and base requirements
• Quantity and destination country
Technical Next Steps
Continue Through the Dust Collection Selection Route
For an existing system after a filter change, use the baghouse retrofit comparison checklist. It separates measured before-and-after conditions from a new design assumption.
Use the next guide according to whether the open question is airflow, pressure, operating point, power or the complete application system.
Application Hub
Industrial Dust Collection System →
Review the full route from dust source and capture hood to ductwork, collector, fan and clean-air discharge.
Airflow
Dust Collection System Airflow Calculation
Calculate hood airflow, simultaneous-use points and preliminary total system airflow.
Pressure
Static Pressure vs Total Pressure
Confirm the correct pressure definition before fixing the fan duty point.
Operating Point
Fan Performance Curve
Check airflow and pressure together at the real system working point.
Motor Power
Industrial Fan Power Calculation
Confirm motor kW after duty point, efficiency and safety margin are established.
Abrasive Dust
Cement Plant Dust Collection Fans
Review mineral-particle abrasion, pre-separation and wear-protection requirements.
Baghouse Fan FAQ
FAQ About Baghouse Dust Collector Fan Selection
Should baghouse fan pressure include filter resistance?
Yes. Include the defined duct, fitting, damper, collector/filter and outlet losses at the design airflow, using a consistent static or total pressure basis and system boundary. Count the filter loss once at the selected loading condition: use a total loaded-filter pressure drop directly, or add a clean baseline only to an explicitly stated additional increment. Clean-filter resistance alone may underestimate the design duty.
Is the fan installed before or after the baghouse?
Both arrangements are possible. A clean-side fan is installed after filtration and normally faces less impeller wear. A dust-laden side fan must be reviewed according to dust type, particle size, particle hardness, concentration and buildup risk.
Can C6-48 be used for a baghouse dust collector?
C6-48 can be reviewed for light dust, wood chips, fine fibers and similar loose particles. If the baghouse system has high static pressure, long ducts, heavy abrasive dust or high filter resistance, QIYUE FAN may review 9-19 or 9-26 high-pressure fan directions.
Why does airflow drop after the dust collector runs for some time?
A common reason is that loaded-filter pressure drop was not included during fan selection. As dust builds on filter bags, resistance increases and the actual airflow may fall below the required capture airflow.
Should I select the fan only by motor power?
No. Motor power does not define the operating point. The fan should first be checked by airflow and static pressure or total pressure. Motor power is confirmed after fan speed, efficiency, working point and safety margin are reviewed.
What data should be provided for quotation?
Please send airflow, static pressure or total pressure, baghouse type, filter resistance, loaded-filter pressure drop, dust type, particle size, duct length, elbows, fan position, temperature, outlet angle, rotation direction, voltage and quantity.
How should airflow be calculated before selecting a baghouse fan?
Calculate airflow from each capture hood, hood opening or capture velocity, simultaneously active points, branch balance and a suitable allowance. Then confirm that duct conveying velocity remains adequate. Use the dust collection system airflow calculation guide before fixing the fan operating point.
What should be reviewed for cement and abrasive mineral dust?
Cement and mineral dust can accelerate impeller and casing wear. Review particle hardness, concentration, pre-separation efficiency, fan position, collector resistance and possible wear-resistant construction before selection. See the cement plant fan application guide.
Send Your Operating Conditions
Airflow, pressure, gas medium, temperature, voltage and quantity.