A Comprehensive Guide to Operating Gas-Suspension Blowers: An Operations and Maintenance Manual from Beginner to Expert

I. What is an air‑suspension blower?

Air-suspension blower Also known as an air‑suspended centrifugal blower, it is a next‑generation, high‑efficiency, energy‑saving blower that integrates advanced aerospace turbomachinery design expertise. Leveraging three core technologies—ultra‑high‑speed direct‑drive motor, air‑suspension bearings, and a high‑precision single‑stage centrifugal impeller—it fundamentally redefines the conventional blower design paradigm.

Its operating principle is straightforward: the motor’s spindle is directly coupled to the fan impeller on a common shaft, and the high-speed rotor system is supported by air‑bearing technology. As the impeller spins at high speed, the airflow between the rotor and the foil‑bearing surface generates dynamic pressure, forming a high‑pressure gas film that levitates the rotor. After the impeller does work on the gas, the flow passages within the impeller and diffuser leverage centrifugal compression and deceleration‑induced expansion to convert mechanical energy into the gas’s pressure energy. Throughout this process, there is no physical contact between the rotating shaft and the bearings, enabling non‑contact, wear‑free suspension support.

Compared with conventional Roots blowers, air‑suspension blowers can achieve energy savings of approximately 30% to 35%; compared with traditional multi‑stage centrifugal blowers, they offer energy savings of about 15% to 20%. With noise levels below 80 decibels, they deliver truly low-noise, vibration‑free operation. Thanks to these advantages, air‑suspension blowers have been widely adopted across numerous sectors, including municipal wastewater aeration, industrial wastewater treatment, pneumatic conveying in the cement and building materials industries, flue‑gas desulfurization in thermal power plants, as well as food and pharmaceutical processing, textile dyeing, and leather and paper manufacturing.

However, the more sophisticated the equipment, the higher the demands on operation and maintenance. Gas‑suspension blowers integrate high‑speed rotating mechanical components with high‑voltage electrical parts; improper or inappropriate operation can result in equipment damage or even personal injury. Below, we systematically outline the operational precautions for gas‑suspension blowers across five key aspects: installation, startup, operation, shutdown, and maintenance.

II. Installation Phase: Laying a Solid Foundation Is Key

Although air‑suspension blowers are marketed as “vibration‑free,” this by no means implies that they can be installed arbitrarily. Negligence during the installation process often plants the seeds of potential problems in subsequent operation.

Venue Selection : The ideal operating temperature range is between –20°C and 50°C. Select a relatively open, clean, and dry indoor area that ensures good air circulation. The equipment should be installed at least 1.5 meters away from walls or other devices, with sufficient space reserved for maintenance and servicing. Installation in environments with high airborne salt content, corrosive gases, excessive dust and sand, or the presence of flammable or explosive gases is strictly prohibited. There should be no significant vibration sources in the vicinity of the equipment; if the root-mean-square vibration velocity at the installation location exceeds 1 mm/s, vibration‑damping measures must be implemented.

Basic Requirements The installation foundation must be level and stable; a concrete foundation with a minimum thickness of 200 mm is recommended, and it should be precisely leveled (tolerance ≤ 0.5 mm/m). The foundation’s length and width should each exceed the blower base dimensions by 200–300 mm. When multiple blowers are installed in the same room, they should be arranged side by side with uniform orientation, maintaining a center-to-center spacing of at least 1,500 mm.

Pipeline connection All piping must be adequately supported to prevent pipe stresses and moments from being transmitted to the blower flange. When connecting piping, ensure proper alignment and tight sealing to avoid transferring external loads to the core unit.

Electrical wiring : The cables connecting the equipment must comply with the requirements specified in the product manual. When power supply voltage fluctuations exceed ±5%, a voltage regulator must be installed. All pressure and temperature sensors shall be mounted in accordance with established standards, with proper wiring shielding to prevent signal interference.

III. Pre-Startup Inspection: An extra check reduces risk.

Pre‑startup inspections for air‑suspension blowers constitute the first line of defense against equipment damage. Many major failures stem from oversight during the pre‑startup phase.

Valve and Pipeline Inspection Before starting, ensure that the valves on the exhaust ductwork are fully open. If the blower is started with these valves closed, it may suffer severe damage due to surge. Also, verify that the manual valves are properly opened and that the check valves are installed in the correct orientation. If the supply air ductwork is connected to other standby equipment, confirm that the valves on the connecting lines are in proper operating condition.

Operating Mode Confirmation : Verify that the blower’s operating mode matches the required setting. If the control panel is set to remote mode, the equipment cannot be directly “started” or “operated” on-site; to initiate operation locally, first select local mode.

Running Parameter Confirmation : Verify that the blower’s startup and operating frequency are appropriate. Determine the proper startup speed based on the outlet pressure and the performance curve—for example, when the outlet pressure is 40 kPa, the startup speed must be at least 23,000 rpm. If the startup speed is set too low, the equipment may fail to start properly, and the touch screen will display a “Surge Boundary Reached” warning.

Equipment Status Check : Verify that the touchscreen operation data is normal. Check that the blower is in good condition and that there are no foreign objects on the enclosure. Confirm that the pressure relief valve is functioning properly. For water-cooled models, also ensure that the water level in the tank remains above the warning line.

Special Reminder If the equipment has been idle for an extended period, it is recommended to start it up twice a month to maintain system performance.

IV. Startup and Operation: Standardized Procedures Ensure Safety

Power-On and Self-Test : First, rotate the circuit breaker on the side of the chassis to the “ON” position to power the device. Press the “Power” button on the control panel to start the controller; the system will automatically perform a self‑diagnosis of all sensors and the controller itself. If no abnormalities are detected, the touchscreen will display the main menu, with a standby status indicator in the upper‑right corner. If the self‑test detects a fault, refer to the user manual for troubleshooting steps.

Start operation : After confirming that the sensor parameters on the touchscreen main menu are normal, set an appropriate operating speed. Press and hold the “Start” button on the touchscreen (typically for three seconds) to activate the blower. During startup, carefully monitor the “Status Bar” for normal prompts and verify that the performance parameter readings are within acceptable limits. Once the rotational speed reaches the target value, the relief valve will close automatically, and the Start button light will illuminate, indicating that startup is complete. At this point, confirm that the relief valve has closed—this can be determined by listening for the corresponding sound—and check whether the preset speed has been achieved.

Operation Monitoring : During operation, refrain from performing any actions other than necessary adjustments. Continuously monitor the key parameters displayed on the touch screen, including operating status, output speed, flow rate, outlet air pressure, outlet air temperature, current, and power. If the discharge pressure exceeds the allowable limit or the rotational speed drops below the minimum threshold, the equipment will automatically shut down to prevent surge‑induced damage. Therefore, during operation, ensure that the operating point remains well clear of the surge region.

Safety Red Line : When the fan is energized, never open the blower housing—high‑voltage electrical components and high‑speed rotating mechanical parts are contained within. Do not operate this product in environments with flammable or explosive gases or dust. Do not modify the product’s structure or control system without authorization. Overloading is strictly prohibited; both the pressure and airflow must remain within their rated limits.

V. Shutdown Procedures: A Strong Start and a Strong Finish Are Equally Important

Normal shutdown : After pressing the “Stop” button on the controller, the relief valve automatically opens to reduce the discharge pressure, and the equipment gradually slows down. Once the equipment has come to a normal stop, the stop-button indicator light dims. Since it takes some time for the rotating shaft to come to a complete halt, Restart is allowed after 30 seconds. 。

Emergency Shutdown : In the event of a fire, electrical leakage, or other emergencies, press the emergency stop button on the right side of the controller panel to initiate an immediate, forced shutdown. However, please note that during an emergency stop, the relief valve will open and the power supply will be cut off. Although the equipment can shut down within a very short time, surge phenomena may occur, potentially damaging the equipment; therefore, Emergency shutdowns should be avoided whenever possible. After an emergency stop, the emergency stop button must be released by rotating it clockwise.

Post-Stop Operations : After the equipment is shut down, wait until the rotor has come to a complete stop (typically 5–10 minutes) and the bearing air supply pressure has dropped to zero before disconnecting the main power supply. Never abruptly cut power while the rotor is still rotating; doing so may cause the bearings to lose pressurized air, leading to friction and immediate damage to the equipment. For blowers that will remain idle for an extended period, close both the inlet and outlet dampers.

VI. Maintenance and Upkeep: Prevention Is Better Than Cure

Although air‑suspension blowers are marketed as “maintenance‑free,” this by no means implies that they require no maintenance at all. On the contrary, because their core components are extremely precise, maintenance must be carried out with utmost rigor and attention to detail.

Filter System Maintenance (High Frequency) The air intake filter of the air‑suspension blower is a critical component that ensures the equipment operates properly. It is recommended to clean the filter cotton once every week and replace it every four weeks. The specific maintenance schedule may be adjusted according to the dust levels in the operating environment—shorten the interval in dusty conditions. When the touch screen displays a “Filter Cleaning Warning,” immediate cleaning is required. Use compressed air to blow out the filter during cleaning. Do not wash with water. Otherwise, the filter may be damaged. The filter cotton can be cleaned a maximum of 2–3 times; after that, it must be replaced.

Cooling System Maintenance (Quarterly) : For air-cooled models, clean dust from the radiator fins using compressed air or a brush, taking care to avoid deforming the fins. For water-cooled models, check the cooling water flow rate and temperature (inlet water temperature ≤ 35°C), and replace the cooling water regularly. It is recommended to use deionized water or softened water; tap water is prohibited. to prevent scale buildup from clogging the piping. Replace the cooling water once a month, or whenever the water’s electrical conductivity exceeds 100 μS/cm.

Core Component Inspection (Monthly) : Check whether the air filter is clogged. Verify that the bearing supply pressure is within the normal range (typically 0.4–0.6 MPa)—insufficient pressure can cause the bearing to lose its levitation capability. Inspect the air supply lines for leaks.

Parameter Calibration (Quarterly) : Calibrate the current, voltage, and air‑pressure readings on the control panel using precision instruments, ensuring that the deviation from the actual values does not exceed 3%. Use a torque wrench to verify that the motor base mounting bolts and bearing housing fasteners are securely tightened.

Environmental Management : Maintain a clean data center environment and minimize dust sources. Paying close attention to data center environmental management is critical for equipment longevity.

VII. Common Faults and Troubleshooting Approaches

The equipment triggers an alarm or shuts down automatically for no apparent reason. : Do not restart immediately. Refer to the alarm codes displayed on the control panel for the most direct clues. Common causes include: severe clogging of the inlet filter resulting in insufficient air intake; system pressure far exceeding the design‑rated pressure; the cooling fan failing to operate or radiator fins being covered with dust; and excessive vibration due to loose foundation bolts or pipeline stress.

Insufficient airflow or pressure output : Verify that the current operating point remains within the equipment’s performance curve’s valid range. Inspect all piping, valves, and flanged connections between the fan outlet and the process point for air leaks. Check the filter condition—even slight fouling of the filter element can increase intake resistance.

Abnormally high energy consumption : Internal dynamic balance and clearances may change due to accidental impacts or prolonged wear. In such cases, please contact a qualified manufacturer for remote diagnostics or on-site inspection.

Filter Clogging Alarm After cleaning or replacing the filter cotton, you must reset the alarm message on the touch screen; otherwise, the blower will not start. The same alarm message has repeatedly occurred two or more times within a short period. , you should contact the manufacturer promptly.

VIII. Conclusion

Air‑suspension blowers represent the future of blower technology, with their energy efficiency, environmental friendliness, and low noise levels already proven across numerous industries. However, even the most advanced equipment cannot function without proper operation and meticulous maintenance. From site selection and installation to startup inspections, from operational monitoring to shutdown procedures, and from routine upkeep to troubleshooting—any oversight at any stage can exact a heavy price from this “precision instrument.”

Establish detailed operation and maintenance records, and forge long-term service‑and‑maintenance partnerships with reputable manufacturers. Only by embedding standardized operating procedures into daily habits and institutionalizing preventive maintenance can air‑suspension blowers maintain efficient, stable, and reliable performance throughout their entire lifecycle, truly delivering value—“a worthwhile purchase, excellent performance, and lasting durability.”