FBD Series / Coal Mine Press-In Local Ventilation
FBD Explosion-Proof Press-In Counter-Rotating Local Ventilation Fan
FBD series is designed for press-in local ventilation at underground coal mine heading faces, mining roadways, chambers and tunnel construction areas. Its two-stage counter-rotating axial structure provides higher pressure capability for duct-connected fresh-air delivery over longer distances and under changing ventilation resistance.
Ventilation Mode
Press-In Local Ventilation
Fresh air through ducting
Page Airflow Range
89–1880 m³/min
Representative FBD range
Page Pressure Range
256–9930 Pa
Page summary value
Fan Structure
Two-Stage Counter-Rotating
Whole-unit or staged use
On This Page
Selection Focus
Roadway Length
Duct Diameter
Airflow
Total Pressure
Roadway Length
Duct Diameter
Airflow
Total Pressure
01 / Engineering Overview
Fresh-Air Delivery to Underground Heading Faces
FBD is a press-in local ventilation fan. Its job is to push fresh air through ventilation ducting toward an underground heading face, chamber or roadway excavation area.
The two-stage counter-rotating structure gives the fan stronger pressure capability than a basic single-stage local fan, making the FBD direction suitable where the duct is longer, resistance is higher or the project requires more flexible operation as the roadway advances.
01 / AIR SUPPLY
Press Fresh Air into the Duct
The fan supplies fresh intake air through the ventilation duct toward the local underground working area.
02 / PRESSURE
Overcome Duct Resistance
Two counter-rotating stages provide pressure capability for longer duct systems and more demanding resistance conditions.
03 / FLEXIBILITY
Whole or Staged Operation
The fan can operate as the complete two-stage unit or by stages according to the required ventilation resistance.
02 / Press-In Ventilation Logic
Push Fresh Air Through the Duct to the Working Face
Press-in ventilation places the fan on the fresh-air side and uses positive pressure to transport air through ducting toward the excavation or working face.
STEP 01
Fresh-Air Intake
The fan is positioned in the intake-air side where approved underground safety conditions are satisfied.
STEP 02
Fan Pressure
The counter-rotating fan develops the pressure required to move air through the connected ventilation duct.
STEP 03
Duct Delivery
Fresh air travels along the ventilation duct toward the underground heading or chamber.
STEP 04
Working Face
The supplied air reaches the local working area to support heading-face and roadway ventilation.
Longer duct length, smaller duct diameter, bends and leakage increase the resistance that the fan must overcome. Selection should therefore match the complete duct system rather than only the motor power.
03 / Structure & Operation
Two-Stage Counter-Rotating Structure for Local Duct Ventilation
FEATURE
CONFIGURATION
BENEFIT
Counter-Rotating Structure
Two axial stages rotate in opposite directions
Improves pressure capability and air-delivery performance
Flameproof Motor
YBF / YBF2 flameproof motor configuration
For coal mine underground use under approved safety conditions
Flexible Operation
Complete unit or staged use
Matches different resistance conditions and reduces unnecessary power use
Installation Method
Floor-mounted or suspended installation
Adapts to different roadway layouts and available space
Low-Noise Design
Optimized airflow and noise-control structure
Supports a better working environment in confined underground areas
Two-Stage Operation
Use the complete counter-rotating unit when the duct system requires the higher pressure capability of both stages.
Staged Operation
Stage operation can be used when the full pressure of the complete unit is not required for the current ventilation resistance.
04 / Operating Conditions
Confirm the Underground Environment Before Operation
FBD is used in underground coal mine local ventilation, so the fan selection and installation position must be reviewed together with the mine safety conditions.
GAS TEMPERATURE
-20°C to +40°C
Reference gas-temperature range stated in the supplied product information.
DUST CONTENT
≤ 200 mg/m³
Reference maximum dust content of the conveyed air stated on the source page.
INSTALLATION POSITION
Intake Airflow
The fan should be installed on the intake-air side under approved coal mine safety conditions.
INSTALLATION METHOD
Floor or Suspended
The source page supports floor-mounted installation or suspension on the roadway wall.
Mine safety note: the fan should operate where methane concentration remains below the approved safety limit. If the permitted value is exceeded, power must be cut off according to the applicable coal mine safety requirements.
05 / Performance Parameters
FBD Representative Performance Data
The following values are preserved from the supplied FBD series data. Final model selection should consider roadway length, duct resistance, required airflow, total pressure, voltage and installation method.
NO.
SPEED
r/min
r/min
AIRFLOW
m³/min
m³/min
TOTAL
PRESSURE
PRESSURE
MOTOR MODEL
POWER
kW
kW
VOLTAGE
V
V
CURRENT
A
A
No.4.0
2900
136–89
256–2050
YBF90L-2
2×2.2
380/660
4.85/2.79
No.4.5
2900
165–109
375–3040
YBF112M-2
2×4
380/660
8.1/4.7
No.5.0
2900
240–161
325–2540
YBF132S1-2
2×5.5
380/660/1140
11.1/6.4/3.7
No.5.6
2900
324–215
375–3690
YBF160M1-2
2×11
380/660/1140
21.6/12.6/7.2
No.6.3
2900
518–318
640–7310
YBF200L1-2
2×30
380/660/1140
56.9/32.9/18.5
No.8.0
2900
970–560
850–9950
YBF2-280S-2
2×75
380/660/1140
134/77/44.2
No.10.0
1450
1380–800
710–8520
YBF2-280M-4
2×90
380/660/1140
167/96/55.5
No.11.2
1450
1880–1090
850–9930
YBF2-315M-4
2×132
380/660/1140
240/139/80.5
Source data note: the page summary states a total-pressure range of 256–9930 Pa, while the supplied No.8.0 row lists 850–9950 Pa. Both values are retained exactly as provided rather than silently reconciled.
06 / Performance Guide
How to Read the FBD Performance Data
The correct FBD model should be selected from the ventilation duty and duct resistance, not simply from the motor rating.
01
Machine No.
Shows the nominal fan-size direction within the FBD range.
02
Speed
The listed models use either 2900 r/min or 1450 r/min in the supplied data.
03
Airflow
Compare the listed airflow range with the required fresh-air volume for the underground working area.
04
Total Pressure
Total pressure should match duct resistance, air-delivery distance and the required airflow.
05
Motor Model
The supplied table lists YBF and YBF2 flameproof motor configurations for the representative models.
06
Installed Power
The 2× power notation reflects the two-stage counter-rotating configuration.
07
Voltage / Current
Confirm the project voltage before selecting the corresponding motor and rated-current configuration.
07 / Selection Input
What to Send for FBD Fan Selection
For a new FBD project, the most useful information is the actual roadway and ventilation-duct condition.
01
Roadway Length
Provide the planned air-delivery distance from the fan to the underground working face.
02
Required Airflow
State the required fresh-air volume at the local working area.
03
Total Pressure
Provide the required total pressure if already calculated.
04
Duct Diameter
Provide the ventilation-duct diameter and available duct information.
05
Installation Method
Confirm whether the fan will be floor-mounted or suspended.
06
Voltage Requirement
Confirm the required voltage before matching the motor configuration.
07
Quantity
Provide the required number of fans or local ventilation systems.
08 / Typical Applications
Press-In Local Ventilation Applications
01 / HEADING FACE
Coal Mine Heading Face
Fresh-air delivery through ventilation ducting to underground heading and excavation faces.
02 / ROADWAY
Mine Roadway Ventilation
Local air supply for roadway excavation sections requiring duct-connected forced ventilation.
03 / CHAMBER
Underground Chambers
Local press-in ventilation for underground chambers and confined work areas.
04 / TUNNEL
Tunnel Construction
Can be reviewed for duct-connected local ventilation in tunnel construction projects requiring press-in air supply.
09 / Product Boundary
FB, FBD or FBCD: First Confirm the Ventilation Direction
These products all belong to mine local ventilation, but they should not be treated as interchangeable model names.
SERIES
VENTILATION MODE
SELECTION DIRECTION
FB
Press-in local air supply
Short / medium duct distance, compact local ventilation and moderate pressure requirement
FBD
Press-in counter-rotating
Longer ducts, stronger resistance and higher-pressure local fresh-air delivery
FBCD
Extractive local ventilation
Negative-pressure ducting and contaminated / return-air extraction from local underground sections
10 / FAQ
FBD Press-In Local Ventilation Fan Questions
What does press-in ventilation mean?
The fan pushes fresh air into the ventilation duct so the air is delivered toward the underground heading face, chamber or roadway working area.
Why does FBD use two counter-rotating stages?
The two axial stages rotate in opposite directions to provide stronger pressure capability for duct-connected local ventilation.
Can FBD operate with only one stage?
The supplied product information states that the fan can be used as a complete unit or by stages according to different ventilation-resistance requirements.
Can the fan be suspended?
Yes. The current product information supports either roadway-floor installation or suspended installation on the roadway wall.
What is the listed temperature range?
The supplied page specifies a conveyed-gas temperature range of -20°C to +40°C.
What is the difference between FBD and FBCD?
FBD is used for press-in fresh-air delivery. FBCD is a separate extractive local ventilation direction used with negative-pressure ducting.
When should FBD be checked instead of FB?
FBD should be reviewed when the duct is longer, the resistance is higher or stronger pressure capability is required from a counter-rotating local fan.
What information is needed for quotation?
Provide roadway length, required airflow, required total pressure, duct diameter, installation method, voltage requirement and quantity.
Related Technical Pages
Continue the Underground Local Ventilation Review
FBD Local Ventilation Fan Selection
Send the Roadway and Duct Conditions.
Roadway Length · Required Airflow · Total Pressure · Duct Diameter · Installation Method · Voltage · Quantity
Manager Zhao
SHANDONG QIYUE FAN CO., LTD.
Industrial fan selection and export project support
Tel / WeChat / WhatsApp: +86 15653305981
Email: sales@qiyuefan.com
Factory: Dongchen Industrial Park, Zhoucun District, Zibo, Shandong, China
Email: sales@qiyuefan.com
Factory: Dongchen Industrial Park, Zhoucun District, Zibo, Shandong, China
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