Taking Out The Guesswork & Ensuring Peace Of Mind

• We understand that the day-to-day running of your facility often pushes compressor servicing down the priority list.
• That’s why we provide all the information you need to take the guesswork out of compressor servicing—ensuring complete peace of mind.
• Below are some of the most frequently asked questions we receive.

Servicing & Replacement

How often should a compressor be serviced?

Maintenance intervals depend on operating hours and conditions. Even if operating hours aren’t reached within 6–12 months, a service is required due to part wear and filter ageing. At minimum, every compressor should be serviced once per year.

How often must I change my compressed air filters?

Filter elements (oil, air, separator, mains) should be replaced every 6–12 months, depending on type and usage.

Why should I replace my filter element regularly?

Regular replacement ensures a continuous supply of high-quality air and reduces energy costs.

How often must the oil be changed?

Mineral compressor oils should be changed every 4,000 hours, synthetic oils can last twice as long. Conditions may alter this, so oil checks are recommended.

What kind of oil should I use?

Always use oil approved by the manufacturer. Options include mineral, synthetic, or food-grade oils—depending on application.

When do I have to replace the compressor stage?

Bearings typically last ~35,000 hours. Preventative replacement is recommended at this point, covered by Assure Service Agreements.

How long is the lifetime of a compressor?

Service life depends on operating hours rather than age. Upgrades, retrofits, or replacement may be more cost-effective and efficient over time.

Compressor Testing

When do I have to carry out a pressure vessel test?

Visual inspection: every 5 years. Pressure test: every 10 years. Tanks <1000L can be tested by a competent person; >1000L require TÜV/DEKRA or equivalent experts.

Do I have to take a DGUV3 test, and when?

The DGUV3 regulation requires inspection of electrical systems every 4 years, typically alongside compressor maintenance.

Servicing Agreements & Monitoring

Can I obtain a bespoke service agreement?

Yes. Agreements can be tailored to your plant’s unique requirements, ensuring reliability and predictable costs.

Is there a monitoring system for compressors?

Yes. iConn provides 24/7 monitoring, while EcoPlant uses AI to maximise efficiency.

Energy Saving

Can I retrofit a heat recovery system?

Yes, retrofitting is possible but requires design approval to ensure safety and efficiency.

Does it make sense to switch off the refrigeration dryer after production?

Not always. Dryers need cooldown time to restart. If the dryer cannot be restarted in time, it should remain on to avoid higher energy costs from condensate removal.

General Questions

Why does the compressor tank heat up?

Heat is a natural by-product of compression; it warms the air, oil, and tank.

How much compressed air can flow through a pipe?

It depends on pipe material, diameter, and conditions. See CompAir’s EPL Pipework page:
https://www.compair.com/en-gb/products/epl-piping

Can an air compressor explode?

Compressed air is high-pressure and dangerous if mishandled. Incorrect use, poor maintenance, or defects can cause sudden decompression risks.

Can the container of an air compressor be welded?

Yes, but only by ASME-certified welders. All CompAir pressure vessels are ASME-certified and must be repaired accordingly.

Does compressor operation produce carbon monoxide?

Electric compressors don’t produce CO themselves but can compress CO present in the ambient air. Regulations must always be followed.

Does a compressor filled with air weigh more?

Yes. A charged reservoir weighs more than an empty one. Never move or service a compressor under pressure or while connected to power.

Any other questions? Please contact us—our experts will be happy to help.