Published by Shandong Bofeng Fan Co., Ltd.
Factory acceptance of a mine ventilation fan involves reviewing the supplied configuration, the inspection results and the performance data against the requirements for the order. The review should cover both the condition of the assembled fan and its agreed airflow and pressure duty.
This guide uses an excerpt from Bofeng’s FK series forcing auxiliary-fan inspection documentation to explain the recorded checks. It also provides practical guidance for purchasers on test conditions, acceptance records and site commissioning.
1. Confirm the Requirements Before Factory Acceptance
Begin with the technical requirements and inspection procedures for the selected fan series. For the project, also agree the operating duty, additional test points, any witnessing arrangements and the required document package. Keep these details in the technical agreement so that the purchaser and manufacturer review the same requirements.
| Item | Information to specify |
|---|---|
| Fan configuration | Fan model, ventilation duty, motor configuration and supplied accessories. |
| Performance duty | Required airflow and pressure at the same operating point; static- or total-pressure basis; any additional test points. |
| Electrical supply | Motor rated power, supply voltage and frequency, and starting or control requirements. |
| Test conditions and criteria | Applicable inspection requirements, test method, operating conditions and performance tolerances. |
| Acceptance records | Required inspection and performance reports, curve coverage, and buyer or third-party witnessing arrangements, where specified. |
At the document-review stage, match the fan model, serial number and motor details to the order and equipment nameplate. This connects the results to the supplied unit.
2. Eight Items in the Factory Inspection Report
The Bofeng FK series report separates each inspection item into a requirement, a recorded result and a pass/fail decision. The table below summarises its eight inspection categories in the order used in the report; the original entries are visible in the report excerpt.
| Inspection item | What the report covers |
|---|---|
| Appearance and quality | Lifting and mounting features, impeller and casing welds, surface condition, fasteners and paint finish. |
| Mechanical operation test | Smooth running and the absence of abnormal noise during the operation check. |
| Forcing fan impeller clearance | The specified impeller-clearance requirement and the recorded clearance measurements. |
| RMS vibration velocity | A numerical vibration result in mm/s, compared with the limit stated for the inspection. |
| Impeller dynamic balance quality grade | The balance-quality requirement and conformity result, with detailed data referenced to the Production Process Inspection Record. |
| Maximum motor output power | The recorded power result and a requirement expressed relative to the motor’s rated power. |
| Airflow | The airflow range in m³/min, compared with the company’s technical requirements. |
| Total pressure | The total-pressure range in Pa, compared with the company’s technical requirements. |
The report therefore brings together assembly, running and performance-related checks. Its overall inspection conclusion is recorded after the individual items.
3. Factory Inspection Report Example
The excerpt below identifies an FK No.5.7 mine forcing axial-flow local ventilation fan. Its motor section lists a YE3-160M1-2 motor, 11 kW rated power, 415 V and 2,900 r/min.
Bofeng factory inspection report excerpt for an FK series forcing auxiliary fan. Order-identifying details have been removed for confidentiality.
| Recorded item | Entry in the report |
|---|---|
| Mechanical operation | Smooth operation with no abnormal noise; marked as conforming. |
| RMS vibration velocity | 3.6 mm/s against a stated limit of ≤4.6 mm/s; marked Pass. |
| Airflow range | 180–282 m³/min. |
| Total-pressure range | 1,410–310 Pa. |
| Overall inspection conclusion | Pass. |
These entries relate to this report example. Use the applicable requirements for the selected fan configuration when reviewing another unit.
4. Review Airflow, Pressure and Power on the Correct Basis
Compare airflow and pressure at the same duty point
For acceptance at a specified duty point, compare the required airflow and pressure with the corresponding values on the performance curve or test-point record. The pressure definition, fan configuration and test conditions should match the agreed basis.
In the example, the airflow and total-pressure rows each give a range rather than paired test points. Use the corresponding curve and test data to check a particular airflow–pressure combination. The pressure entry is explicitly total pressure, so it should be compared with a total-pressure requirement.
For readers working in m³/s, the recorded airflow range of 180–282 m³/min is equivalent to 3.00–4.70 m³/s.
Distinguish motor data from the power inspection result
The motor’s rated power is configuration information. The report records the power inspection separately under “Maximum Motor Output Power,” with a requirement expressed as a proportion of rated motor power. When agreeing the acceptance records, specify the power quantity, unit and measurement or calculation method so that the result can be compared on the correct basis.
Where the project requires efficiency or a numerical sound-level result, include the corresponding test and documentation requirements in the agreed scope. The mechanical-operation entry records running condition and abnormal noise, rather than an acoustic measurement.
5. Define the Supporting Records and Test Methods
For a project requiring verification of a specified duty point, agree the supporting documents alongside the inspection summary. The following is a purchaser’s checklist for defining that package.
| Document | Purpose in the acceptance review |
|---|---|
| Factory inspection report | Connects the fan identification with the inspection requirements, recorded results and acceptance decisions. |
| Raw data and calculation summary | Shows the test readings and the calculations behind the reported performance values. |
| Aerodynamic performance curve | Shows the relationship between airflow and pressure for the identified fan configuration and test conditions. |
| Relevant process and measurement records | Provides the applicable balancing record, test conditions and instrument or calibration references required by the inspection plan. |
Where a result requires clarification or corrective action, record the issue, the agreed action and the outcome of the relevant check before closing the acceptance review.
Inspection basis shown in the report
The example lists JB/T 9100-2014, “Technical Specifications for Mine Local Ventilation Fans,” and Q/BFJ008-2026, “Technical Specifications for FK Series Mine Forcing Axial-Flow Local Ventilation Fans,” as its inspection basis.
References for specifying a performance test
For test-method planning, ISO 5801:2017 covers fan performance testing using standardised airways, while ISO 5802:2001 covers testing in situ. ISO 13348:2025 addresses performance tolerances, conversion methods and technical data presentation.
These are additional method references, separate from the inspection basis listed in the example. Identify the applicable standard, edition and amendments in the project test plan.
6. Plan Site Commissioning as a Separate Stage
Factory tests record the fan under defined test conditions. Site commissioning checks the equipment after installation in the ventilation system, where the duct or roadway resistance, leakage, mounting, electrical supply and controls affect operation. Keep the site acceptance record separate from the factory test records.
For an auxiliary-ventilation project, specify where the required airflow is to be delivered and measured. Include that requirement in the site commissioning plan for the responsible ventilation team.
For the manufacturing stages and test arrangements associated with these records, see our mine ventilation fan manufacturing and quality-control overview.
Frequently Asked Questions
What information should a purchaser provide for factory acceptance?
Provide the required airflow and pressure duty, pressure basis, fan configuration, supply voltage and frequency, and any specified test points. Add the acceptance criteria, witnessing arrangements and document list required by the project.
When is a performance curve needed?
Use a performance curve and the corresponding data when reviewing a required airflow–pressure duty point or operating range. The inspection summary records the inspection results and decisions; the curve provides the relationship between the performance values.
How should witnessed factory acceptance testing be arranged?
Include the witnessing requirement in the technical agreement. Define the checks to be witnessed, the operating conditions, acceptance criteria, witness method and required records before the test date.
Discuss the Inspection Requirements for Your Fan
Send the required airflow, pressure, power supply, installation arrangement and inspection requirements with your mine auxiliary fan enquiry. Include any specified test points, witnessing requirements and documentation so that the proposed fan configuration and acceptance scope can be reviewed together.
Report source: Shandong Bofeng Fan Co., Ltd., factory inspection documentation for the FK series mine forcing axial-flow local ventilation fan. The public report excerpt supports the inspection-item summary and the selected example entries above.
