FBCZ Series Explosion-Proof Extractive Axial Flow Main Ventilation Fan
01 / Engineering Overview
Single-Stage Main Ventilation for Small and Medium Coal Mines
FBCZ is a dedicated coal mine main ventilation fan series developed around the ventilation-network requirements of small and medium-sized mines. The series was formerly known as BK54 / BK55 and is used where the mine requires stable extractive airflow, explosion-proof structural protection and continuous main-fan operation.
Unlike a local duct fan used only at a working face or roadway section, FBCZ serves the primary mine ventilation network. The selected operating point therefore has to match required mine airflow and network resistance rather than a local duct length alone.
01 / MAIN AIRFLOW
Serve the Primary Mine Network
The fan provides continuous exhaust airflow for the mine’s main ventilation system.
02 / NETWORK
Match Ventilation Resistance
Airflow and pressure should be checked against the actual mine ventilation-network operating condition.
03 / REVERSAL
Reverse Airflow Capability
Reverse rotation can provide approximately 65%–85% of normal airflow according to the available product information.
02 / Main Ventilation Role
FBCZ Works at the Primary Coal Mine Ventilation Level
A main ventilation fan has to support the mine’s complete airflow route. Model selection therefore begins with the required main airflow and the resistance of the complete ventilation network.
STEP 01
Mine Airflow Demand
Confirm the required total mine ventilation airflow for the operating stage.
STEP 02
Network Resistance
Determine the static or total pressure required to overcome mine ventilation-network resistance.
STEP 03
Fan Operating Point
Choose the model and blade setting so the fan operates within the required airflow and pressure range.
STEP 04
Station Conditions
Confirm gas condition, electrical supply, installation space, foundation and reversal requirement.
03 / Structural Features
Main Structural Features of the FBCZ Series
Direct Motor-Impeller Connection
The motor and impeller are directly connected, avoiding a belt transmission or long-shaft drive arrangement.
Enclosed Motor Protection
A fully enclosed cooling cover and air-pressure balance pipe are arranged outside the motor to support operation in the mine ventilation system.
Single-Stage Impeller
FBCZ uses a single-stage working wheel rather than the two-stage counter-rotating structure used by FBCDZ.
Rear Guide Vanes
Rear guide vanes are arranged between the fan and diffuser to support airflow organization and static-pressure performance.
Adjustable Blade Angle
The impeller blade installation angle can be adjusted according to mine production and ventilation requirements.
Stable Performance Curve
The supplied product information describes a stable performance curve without a hump zone for operation under changing mine-network resistance.
04 / Reverse Ventilation
Reverse Rotation Provides Approx. 65%–85% of Normal Airflow
FBCZ can reverse the airflow direction by reversing fan rotation. According to the supplied product information, the reverse airflow can reach approximately 65%–85% of the normal airflow.
Normal Operation
Fan operates in the normal extractive direction to support the primary coal mine ventilation route.
Reverse Operation
Reverse rotation changes the airflow direction without requiring a completely separate fan for the reverse ventilation direction.
Reverse Airflow Level
The reference product information states approximately 65%–85% of normal airflow during reverse operation.
Project Confirmation
The required reverse airflow should be included in the mine ventilation design data before the final fan configuration is confirmed.
05 / Reference Performance
FBCZ-4 / FBCZ-6 Reference Technical Parameters
The following values are the current reference models supplied for preliminary model comparison. Final selection should be checked against mine airflow, pressure, network resistance, gas condition, installation and electrical requirements.
MODEL
AIRFLOW
PRESSURE
POWER
VOLTAGE
FBCZ-4-No8
2.5–7.4 m³/s
173–631 Pa
5.5 kW
380V
FBCZ-4-No9
3.5–10.5 m³/s
219–799 Pa
11 kW
380V
FBCZ-4-No10
4.8–14.4 m³/s
270–986 Pa
15 kW
380V
FBCZ-4-No11
6.4–19.2 m³/s
327–1193 Pa
30 kW
380V
FBCZ-4-No12
8.3–24.9 m³/s
389–1420 Pa
45 kW
380V
FBCZ-4-No13
10.6–31.7 m³/s
475–1667 Pa
55 kW
380V
FBCZ-6-No10
3.2–9.7 m³/s
123–450 Pa
7.5 kW
380V
FBCZ-6-No11
4.3–12.9 m³/s
149–545 Pa
11 kW
380V
FBCZ-6-No12
5.6–16.7 m³/s
177–648 Pa
15 kW
380V
FBCZ-6-No13
7.0–21.3 m³/s
208–761 Pa
22 kW
380V
FBCZ-6-No14
8.8–26.6 m³/s
241–882 Pa
30 kW
380V
FBCZ-6-No15
10.8–32.7 m³/s
277–1013 Pa
45 kW
380V
Reference only: the listed models are for preliminary comparison. Final model, motor and operating point should be confirmed from the actual mine ventilation network.
06 / Performance Guide
How to Read the FBCZ Performance Table
The model table should be used together with the mine ventilation-network requirement. Motor power alone does not define the correct fan.
01
Model
Identifies the FBCZ series configuration and machine number direction.
02
Airflow
Compare the model airflow range with the required mine main airflow.
03
Pressure
Pressure capability should match the mine ventilation-network resistance at the required airflow.
04
Power
The listed motor power belongs to the reference fan configuration and should follow the selected operating duty.
05
Voltage
The current reference table lists 380V. Final electrical configuration should follow the project requirement and confirmed supply.
07 / Selection Logic
Information Required for FBCZ Main Fan Selection
The most useful selection request starts from the mine ventilation calculation and the actual fan-station conditions.
01
Required Airflow
Provide the required coal mine main ventilation airflow.
02
Static / Total Pressure
State the required static pressure or total pressure basis used by the ventilation design.
03
Network Resistance
Provide the mine ventilation-network resistance or resistance calculation when available.
04
Gas Condition
Provide the working environment and gas condition relevant to the required mine-safety configuration.
05
Reverse Airflow
State the required reverse ventilation condition and expected reverse airflow if specified.
06
Power Supply
Provide voltage, frequency and project electrical requirements.
07
Fan Station Layout
Provide installation space, foundation conditions and fan-station arrangement.
08 / Application Scenarios
Coal Mine Main Ventilation Applications
01 / MAIN VENTILATION
Coal Mine Main Ventilation
Designed for continuous main ventilation in small and medium-sized coal mines.
02 / EXTRACTIVE
Mine Exhaust Airflow
Used as an extractive axial-flow main fan in the return-air side of the mine ventilation system.
03 / REVERSAL
Mine Reverse Airflow System
Can support reverse ventilation by reverse rotation where the mine ventilation design requires airflow reversal.
04 / CHANGING RESISTANCE
Changing Mine Network Conditions
Adjustable blade angle allows the fan configuration to be reviewed when mine ventilation requirements change between operating stages.
09 / Product Boundary
FBCZ Single-Stage Main Fan vs. FBCDZ Counter-Rotating Main Fan
Both series belong to coal mine main ventilation, but their aerodynamic structures and typical network directions are different.
COMPARISON
FBCZ
FBCDZ
Main Role
Coal mine main ventilation
Coal mine main ventilation
Impeller
Single-stage axial impeller
Two-stage counter-rotating impellers
Typical Direction
Small and medium coal mines
Larger or higher-resistance mine networks
Selection Basis
Airflow + pressure + network resistance
Airflow + higher pressure / network resistance
10 / FAQ
FBCZ Mine Main Ventilation Fan Questions
Is FBCZ a main fan or a local ventilation fan?
FBCZ is a coal mine main ventilation fan. It serves the primary mine ventilation network rather than a local heading-face duct system.
What is the difference between FBCZ and FBCDZ?
FBCZ uses a single-stage axial impeller. FBCDZ uses a two-stage counter-rotating structure and is normally reviewed where the mine network requires greater pressure adaptability.
Can FBCZ reverse the ventilation airflow?
Yes. The supplied product information states that reverse rotation can provide approximately 65%–85% of the normal airflow.
Can the blade angle be adjusted?
Yes. The impeller blade installation angle can be adjusted according to production and ventilation requirements.
Can I select FBCZ only from motor power?
No. Required airflow, pressure and mine ventilation-network resistance should define the operating point first. Motor power follows the selected fan configuration.
Are all FBCZ fans 380V?
The current reference table lists 380V for the displayed models. Final voltage and electrical configuration should be confirmed according to the project requirements.
What if the mine resistance changes over time?
Provide the expected ventilation stages and resistance conditions during selection. The adjustable blade-angle feature allows different operating requirements to be reviewed.
What information is required before quotation?
Provide required airflow, static or total pressure, mine ventilation-network resistance, gas condition, reverse-airflow requirement, power supply and fan-station installation conditions.
Related Technical Pages
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