Quality Control-Ensuring Every Centrifugal Fans are Safe and Reliable
At Suzhou Yonghecheng Fan Industrial, we always consider quality the lifeblood of our products. To ensure that every centrifugal fan operates stably and for extended periods in demanding industrial environments, we have established a comprehensive quality control system, covering every stage from raw material procurement to complete unit shipment. This ensures that all fans meet performance standards, operate reliably, and are safe to use.
Carefully selected raw materials ensure structural strength and durability
Steel and stainless steel are sourced from standardized suppliers and strictly adhere to GB and ASTM standards.
All metal components undergo chemical composition analysis and mechanical property testing before delivery.
FRP composite fan impellers and casings utilize a high-strength resin system for corrosion and fatigue resistance.
High-standard material screening ensures that key fan components possess excellent strength, rigidity, and longevity.
Precision Machining to Ensure Structural Dimensions and Dynamic Balance
Core components such as the impeller, bearing housing, and casing are machined using CNC equipment with an accuracy control of ±0.05mm.
After impeller assembly, dynamic balancing tests are performed to ensure vibration values meet ISO 1940 G6.3 or higher.
All axes are checked for coaxiality after machining to prevent runout.
Precision machining and strict tolerance control ensure smooth operation, low vibration, and low noise throughout the unit.
Strict Assembly Process and Standardized Workmanship
All assembly steps are performed by experienced technicians, using standardized procedures and processes.
Specialized tools such as torque wrenches are used to ensure consistent tightening of connectors.
Clearances between key components such as bearings, motors, and impellers are strictly controlled.
Assembly quality directly impacts the lifespan of the fan, so we employ a meticulous process to ensure consistent operation throughout the unit.
Comprehensive factory testing to ensure each fan meets performance standards
Every centrifugal fan must pass the following key tests before shipment:
Operational testing: Verify start-up smoothness, operating noise, and overall vibration levels.
Performance testing: Verify airflow, air pressure, power, and other specifications according to customer specifications.
Electrical testing: Verify insulation resistance, ground resistance, and power stability.
Appearance inspection: Ensure uniform paint finish, no scratches, and clear labeling.
All test data is recorded and archived, and a performance report or factory inspection form is provided.
Strictly controlled painting and anti-corrosion processes to adapt to various operating environments
Surface coating thickness, adhesion, and salt spray resistance are all performed in accordance with industrial standards.
Customizable coating systems include hot-dip galvanizing, epoxy spraying, and anti-corrosion paint.
Sandblasting is performed before painting to improve paint film adhesion and corrosion resistance.
Professional surface treatment enhances the fan's durability in humid, highly corrosive, and dusty environments.
Improved traceability system and enhanced after-sales support
Each fan is assigned a unique serial number, traceable to the raw material batch and processing records.
Detailed factory documentation is provided, including technical drawings, test records, manuals, and certificates of conformity.
If a customer reports a quality issue, the process link can be quickly identified for a timely response.