Gairs initially specialized in manufacturing oil-injected compressors but later shifted its focus to oil-free models in 1998. Today, Gairs predominantly produces water-injected oil-free single-screw air compressors. In 2024, we introduced a new partner brand, Klina, which offers budget-friendly options including both oil-free and oil-injected models.

Yes, our gas compressors can deal with a wide variety of gases including natural gas, carbon dioxide, helium, argon, air, etc. to meet the specific requirements of your processes.

Oil-free air compressors employ advanced technologies such as specialized rotor coatings or water injection, which serve as both lubricants and coolants. These innovations ensure efficient cooling and sealing operations without relying on traditional lubricating oils. Gairs Water-injected air compressors achieve lubrication through a process where water is injected directly into the compression chamber. Here’s how it works:

1. Injection Process: During compression, an amount of RO (reverse osmosis) water is injected into the compression chamber along with the air being compressed.

2. Mixing and Lubrication: The injected water mixes with the compressed air and forms a water-air mixture. This mixture acts as a lubricant between the rotors in the airend or piston rings (in reciprocating compressors) and the cylinder walls.

3. Sealing and Cooling: Apart from lubrication, the injected water also helps in sealing the internal components and serves as a coolant. It reduces the operating temperature of the compressor, which helps in maintaining efficiency and prolonging the life of components.

4. Water Separation: After compression, the water-air mixture undergoes a separation process in water-air separator tank where the water is removed. This typically occurs through a series of separation stages, such as condensation and filtration, ensuring that only dry, compressed air exits the compressor.

In a word, Water-injected compressors are known for their high efficiency, low maintenance requirements (compared to oil-lubricated systems), and cleaner operation since they do not introduce oil contaminants into the compressed air stream. They are particularly suitable for applications where air quality is crucial, such as in food and beverage processing, pharmaceuticals, and electronics manufacturing.

We highly recommend that our customers use reverse osmosis (RO) water as lubricating water source.
In our Gairs OGW series of water-lubricated compressors, lubricating water is injected into the airend to facilitate cooling. Inside the airend, the water acts as a seal between the star wheel and the screw rotor, enhancing the compressor’s volumetric efficiency. Since the lubricating water continuously circulates within the system, its quality directly impacts the airend’s lifespan. Therefore, it is crucial to adhere strictly to the water quality requirements outlined in the accompanying photo.

Yes, the airend is crucial to any air compressor and is particularly challenging to manufacture. Since our founding in 1988, we have been dedicated to researching and producing airends, accumulating substantial expertise in their design and development over the years.

Oil-free compressors do not require oil for lubrication and are typically cleaner for environments where air quality is critical, such as laboratories, medical settings, food and beverage etc. Oil-lubricated compressors offer better durability and are budget-friendly but require periodic oil changes and maintenance.

Currently for OGW models, we offer 1-year coverage for the whole package and 2-year coverage for the airend.

Both GAIRS and KLINA belong to the GAIRS Group. GAIRS targets the high-end compressed air market and has shifted its focus solely to water-injected oil-free single screw technology. GAIRS’ mission is to deliver 100% clean compressed air while ensuring every GAIRS compressor has the lowest Global Warming Potential (GWP), contributing to a more sustainable environment.

KLINA, in collaboration with trusted partners, offers both oil-injected rotary screw compressors and water-injected oil-free single screw compressors. These models provide efficient, economical, and practical solutions for clients’ compressed air needs.

Yes, we accept ODM/OEM orders. We are happy to customize our products to meet your specific requirements. Please provide detailed specifications, including design, configuration, and any other special requests, so we can offer the best solution tailored to your business.

If you notice any problems with the air compressor, we recommend first referring to the user manual and following the troubleshooting procedures outlined. This will help you address common issues and ensure you are taking the correct steps to maintain your system.

If you are unable to resolve the issue through the user manual’s troubleshooting guide, please contact us. We offer assistance via email or video support, send a technician for on-site troubleshooting, or assess whether the product needs to be sent to a nearby service center for inspection and repair.

It includes water filter element, air filter element, water softener filter replacement , daily valves check and overall operational parameters check.

Single-Stage Compressor:

• Overhaul interval: Every 18,000 running hours or 3 years.

Two-Stage Compressor:

• 1st Stage Air End: Overhaul every 18,000 running hours or 3 years.
• 2nd Stage Air End: Overhaul every 12,000 running hours or 2 years.

Typically, the lead time for a single-stage model is approximately 25-30 working days, while the lead time for a two-stage model is around 40-45 working days.