How to Protect Your Air Compressors During Typhoons & Heavy Rainstorms

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How to Protect Your Air Compressors During Typhoons & Heavy Rainstorms

Release time:

2026-08-17

Typhoon seasons bring sustained heavy rainfall, strong winds and sudden waterlogging, posing severe risks to air compressors placed outdoors, in low-lying workshops or semi-open equipment rooms. Water intrusion, electrical short circuits, lubricant emulsification and air-end rust are common failures caused by extreme rain weather, which often lead to unexpected downtime and heavy production losses. Based on years of industrial compressor operation and maintenance experience, CHANUN sorts out a full-process protection guide to help users keep their equipment stable and safe through severe typhoon and rainstorm days.

1 Pre-Storm Preventive Measures: Eliminate Hidden Risks in Advance

Precaution is always more cost-effective than post-fault repair. Complete the following checks 24–48 hours before the typhoon makes landfall:

1.1 Relocate & Shelter the Unit

For outdoor or semi-outdoor compressors, move them to indoor dry rooms as much as possible; if relocation is not feasible, build a reinforced rainproof shelter and raise the unit base with sleepers or steel frames to avoid being submerged by accumulated ground water. Clear surrounding drainage ditches to ensure smooth rainwater discharge and prevent water from pooling around the equipment.

1.2 Reinforce Electrical System Waterproofing

Cut off the main power supply completely, and seal all cable inlets and cabinet door gaps of the electrical cabinet with waterproof tape or sealing strips. Although CHANUN compressors adopt an independent isolated electrical cabinet design with excellent dust and moisture resistance, extra sealing protection is still necessary under extreme heavy rain conditions to prevent water vapor from seeping into circuit boards and inverter components.

1.3 Seal Air Inlets & External Pipelines

Close the air intake valve and block all open external pipeline ports to prevent rainwater from flowing backward into the air end and air receiver tank along the pipeline. Check and clean the automatic drain valve in advance to ensure it can discharge condensate normally after the weather improves.

1.4 Inspect Lubricant & Consumables

Check the oil level through the external oil sight glass to confirm it is within the standard range. Sufficient lubricant can reduce the risk of condensation inside the air end. For units in high-humidity areas, it is recommended to replace the air filter element in advance to avoid damp blockage after rain.

2 On-Site Management During Typhoons & Heavy Rains

During the typhoon and rainstorm period, prioritize personnel safety and conduct regular inspections at safe intervals:

Never operate the unit with power on: Thunderstorms accompanying typhoons carry high risks of lightning surges. Powering on the compressor may cause inverter burnout and motor damage. Always keep the main power disconnected throughout the extreme weather.
Monitor water level regularly: Check the water accumulation height around the equipment every 2–3 hours. If the water level is close to the unit base, use a water pump to drain it in time to prevent water from entering the cabinet and oil-gas tank.
Keep indoor equipment rooms ventilated: For indoor compressor rooms, keep proper ventilation to avoid excessive ambient humidity, which will cause condensation on the surface of electrical components and accelerate corrosion of internal parts.

3 Post-Storm Inspection & Safe Restart Procedure

Do not power on the unit immediately after the rain stops. Follow the standard steps below for inspection and commissioning to avoid secondary damage:

3.1 Full Drying & Appearance Inspection

First wipe off all rainwater on the surface of the unit. Open the electrical cabinet door and let it ventilate and dry for at least 4 hours. Use a multimeter to test the insulation resistance of the motor and circuit system. Power can only be supplied when there is no water ingress or condensation inside.

3.2 Lubricant Quality Detection

Check the color and texture of the lubricating oil through the oil sight glass. If the oil turns milky white and turbid, it means water has mixed in and caused emulsification. Replace all lubricating oil and oil filters immediately before starting the machine, otherwise it will aggravate the wear of the air end rotor and bearings. CHANUN’s exclusive air-end water accumulation compensation warranty provides reliable after-sales support for users, while standardized pre-rain protection and post-rain maintenance can greatly reduce failure risks and downtime losses.

3.3 Pipeline & Filter Troubleshooting

Take out the air filter element to check for water ingress and dust clogging, and replace it immediately if it is damp. Check all pipeline joints for looseness and leakage caused by strong wind vibration, and retighten pipe clamps in time. Drain all accumulated water inside the air receiver tank through the drain valve at the bottom.

3.4 Step-by-Step Test Run

First perform an inching test to confirm the correct rotation direction of the motor; then run the unit under no-load condition for 15–30 minutes, and observe whether the oil temperature, pressure and noise are normal. After confirming that all parameters are stable, the compressor can be put back into normal production use.

Closing Remarks

The core of air compressor protection under typhoon and heavy rain weather lies in advance prevention and standardized restart operation. CHANUN full-series screw compressors are equipped with IP65 oil-cooled motors and independently sealed electrical cabinets, which have basic weather resistance. With scientific operation and maintenance, users can effectively reduce the failure rate of equipment under extreme weather.

In case of water ingress failure or technical doubts, you can contact CHANUN’s global 200+ service outlets for professional technical support and on-site maintenance services.