Compair Air End ReplacementA11928574

The CompAir A11928574 is a replacement air end assembly specifically designed for the EK175NG rotary screw compressor. This core component, responsible for gas compression and delivery, is constructed of metal and is suitable for industrial applications such as construction, manufacturing, and energy extraction. This spare part offers genuine replacement compatibility with CompAir equipment, comes with a 6-month to 1-year warranty, and is available for rapid delivery through the global supply chain. Designed for high performance and durability, it is ideal for repairing or upgrading older units, restoring compression efficiency and extending their lifespan.

3.1 High-efficiency and energy-saving design
Low speed and high output: By optimizing the rotor profile, the same exhaust volume is maintained when the speed is reduced by 25%, and energy consumption is saved by up to 15%.
Integrated oil system: built-in oil filter and thermostatic valve, eliminating external pipeline leakage points, and reducing maintenance time by 50%.
3.2 Failure safety protection (FSS)
Double lip seal + dust lip: The main sealing lip + dust lip structure blocks external pollutants and extends the seal life by 30%.
Emergency oil drain channel: Automatically drain oil when the main seal fails to avoid safety accidents caused by oil splashing.
3.3 Long-term reliability
Heavy-duty bearings: SKF/C4 grade precision bearings are used to withstand axial force impact and have a lifespan of more than 80,000 hours.
CNC ground rotor: Use five-axis CNC laser calibration processing, with a tolerance of ±3μm to ensure airtightness.

Continuous manufacturing scenarios: Automobile assembly lines, injection molding machine accessories - withstand 24/7 continuous operation to avoid production stoppage losses.
Clean environment requirements: Food processing (such as filling lines), pharmaceutical sterile workshops - 100% oil-free air certification.
High dust conditions: Mines, cement plants - dustproof seal design to prevent particle intrusion.
Sensitive equipment air supply: Laser cutting machines, cnc machine tools - pressure fluctuations ≤ 0.1 bar to protect precision tools.

5.1 Rotor dynamics optimization
Asymmetric tooth profile: 4 teeth for male rotor/6 teeth for female rotor design, reducing compression chamber reflux loss, and increasing volumetric efficiency to 92%.
Surface hardening process: The rotor is nitrided, with a surface hardness of HRC 60, and wear resistance is increased by 3 times.
5.2 Disassembly of the sealing system
A. Dust lip → Prevent dust from entering the sealing area.
B. Main sealing lip → Dynamic seal with a pressure of 25 bar.
C. Safety oil drain groove → Directional guide oil when failure occurs.
The triple protection structure reduces the leakage failure rate to 0.02%.
5.3 Preventive replacement timing
The air end needs to be replaced immediately when any of the following symptoms occur:
Energy consumption increases: The current increases by 10% but the gas production remains unchanged.
Metal chips alarm: >50μm iron chips are found in the oil filter.
Vibration exceeds the standard: Axial vibration value >4.5 mm/s (ISO 10816 standard).

Actual energy saving: In the German TÜV certification test, after replacing A11928574, the energy consumption is 11.7% lower than that of the third-party air end.
Life comparison: The average life of the original CompAir air end is 80,000 hours, while the non-original parts are only 30,000-40,000 hours.
Warranty commitment: Provide the industry's only 10-year warranty (must be used with original lubricants).

7.1 Full-cycle technical support
Remote pre-inspection: Analyze compressor operation data in advance through the iConn system to accurately determine the replacement time.
Old parts discount: Return the old air end to get a discount coupon of 15% of the invoice amount.
7.2 Fast delivery network
Global delivery within 48 hours: Direct delivery from bonded warehouses in major industrial areas in Europe, America and Asia.
Emergency backup machine: Temporary compressors are provided free of charge during overhaul (exclusive for customers ≥100kW).

Q1 How can I confirm that A11928574 is suitable for my compressor?
A: This model is suitable for CompAir D series (D90-D160), Ingersoll Rand SSR EP130 and Gardner Denver R130i, and free model verification service is provided.
Q2 How much cost does preventive replacement save compared to replacement after failure?
A: Take a 160kW compressor as an example:
Preventive replacement: 4 hours of downtime + $18,000 air end fee
Fault repair: average downtime 48 hours + $28,000 (including rotor damage and related repairs)
Comprehensive cost reduction of 55%.
Q3 Can non-original lubricants be used?
A: It will cause the warranty to be invalid! Third-party lubricants are prone to produce sludge and block the internal oil circuit. It has been measured that it will accelerate bearing wear by 300%.
Q4 Is air end reconstruction (Rebuild) more cost-effective than buying new parts?
A: It is only recommended for lightly used units with less than 50,000 hours. The life of rebuilt parts is about 40,000 hours and there is no 10-year warranty. For high-load units, original new parts should still be selected.

Source: Technical data and test standards are quoted from CompAir official website product manual and fluid dynamics laboratory research report.

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