Genuine Kaeser / HPC Sigma 026 Profile Air End
Precision Rotary Screw Airend with World-Renowned SIGMA PROFILE® Rotors

Restore peak efficiency and reliability to your compressed air system with a genuine Kaeser / HPC Sigma 026 Profile air end. This single-stage, fluid-injected rotary screw airend features Kaeser’s proprietary SIGMA PROFILE rotors — the industry benchmark for energy efficiency since 1975.

The Sigma 026 (also known as Sigma 0 / Sigma 0-025-026) is engineered for the smaller SX and SM series compressors (and equivalent HPC PLUSAIR models). Its optimised rotor geometry and precision manufacturing deliver more compressed air for less power, lower operating temperatures, and extended service life.

Key Advantages of the SIGMA PROFILE

• Up to 15–20% lower energy consumption compared with conventional rotor profiles
• Precision-machined to tolerances of 1/1000 mm
• Asymmetrical 5-to-6 lobe design with optimised inlet flow
• Designed for efficient low-speed operation — reduced wear and quieter running
• Fluid injection for sealing, cooling, and lubrication of the rotors
• Dynamically balanced for smooth, vibration-free performance

Ideal For

• Kaeser SX series (approx. 3–7.5 HP / 2.2–5.5 kW)
• Kaeser SM series (approx. 7.5–15 HP / 5.5–9 kW)
• HPC PLUSAIR SX / SM equivalent models
• Replacement or rebuild of Sigma 0 series airends (approx. 72 mm rotor diameter)

Whether you are performing a scheduled airend replacement, a major overhaul, or building a custom package, the genuine Sigma 026 Profile air end ensures you maintain the original efficiency, reliability, and air quality your system was designed for.

Important Notes

• This is the compressor airend (compression element) only. Drive motor, cooler, separator, controls, and enclosure are not included.
• Confirm exact compatibility with your compressor model and serial number before ordering.
• Professional installation by a qualified compressed-air technician is strongly recommended.
• Use only approved Kaeser SIGMA Fluid for lubrication and cooling.

Why Choose Genuine Kaeser / HPC?
Genuine airends are built to the same strict ISO 9001 standards as the original equipment. Aftermarket alternatives often compromise on rotor profile accuracy, bearing quality, and clearances — resulting in higher energy use, increased oil carry-over, and shorter life.

Key Features (bullet points for product page or metafields)

• Genuine Kaeser / HPC Sigma Profile air end (Sigma 026 / Sigma 0 series)
• SIGMA PROFILE rotors – up to 15–20% more efficient than conventional designs
• Precision machined to 1/1000 mm tolerances
• Single-stage, oil-injected (flooded) rotary screw design
• Optimised for low-speed, high-efficiency operation
• Suitable for working pressures up to 15 bar (217 psig)
• Dynamically balanced for quiet running
• Compatible with Kaeser SX and SM series compressors and HPC equivalents
• Approx. 72 mm rotor diameter class
• Fluid injection for sealing, cooling, and lubrication

Technical Specifications

Yes, airlinkcompressors.com offer an installation & commissioning service, please contact support for further information on technical@airlinkcompressors.com

If you purchase any equipment from airlinkcompressors.com you are entitled to free full technical support from experts in the trade, supporting with installation, repairs & servicing. We also offer onging maintenance packages inhouse, please contact technical@airlinkcompressors.com for further information.

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Yes, we do deliver to NI (Northern Ireland) for larger items please ask for a carrige costing - sales@airlinkcompressors.com

Yes, a VAT invoice is sent automatically once the order has been dispatched to the email address supplied when originally ordered.

Yes, airlinkcompressors.com offer an installment option through Klarna, Please click here for further information.