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Quality Control

Our company strictly follows the highest standards of the global manufacturing industry. The core certifications include:

   ISO 9001:2015 quality management system certification, standardized control of the entire process, from raw material procurement to finished product delivery, all pass strict quality node inspections.
   ISO 14001 environmental management system certification, green production process, reduce energy consumption and waste emissions, and comply with the environmental protection requirements of the EU RoHS directive.
   CE certification (EU market access), product safety and electromagnetic compatibility (EMC) meet EU EN 1012, EN 60335 and other standards.
   ASME certification (pressure vessel products), gas tanks and other pressure-bearing components are designed and manufactured according to ASME BPVC Section VIII standards.
   TÜV SÜD/GS certification (German safety certification), key models have passed the safety test of the German Technical Supervision Association and are widely recognized in the international market.

Warranty Policy

  Standard Warranty:
One year from the delivery date.
  Warranty Scope:
All major components, excluding damages caused by human error, foreign objects, or issues related to oil quality.
  Value-added Services:
Smart operation and maintenance solutions that optimize performance, lower investment costs, and maximize uptime.
​​​​​​​ ​​​​​​​ Service Commitment:
 Provide 24-hour online after-sales service, free installation guidance, and operation manual and video.

Quality Inspection FAQ

  • Q What quality inspection items must the air compressor pass before leaving the factory?

    A
    * Performance test: whether the exhaust volume, exhaust pressure, power, energy efficiency ratio, etc. meet the standards.
    * Safety test: pressure vessel strength test, safety valve opening and closing pressure, electrical safety (grounding, insulation resistance, etc.).
    * Operation test: continuous load operation (usually 4-8 hours), check whether the vibration, noise, and temperature rise are normal.
    * Air tightness test: no leakage in pipelines, joints, and gas tanks (commonly used soapy water or nitrogen leak detection).
    * Control system verification: whether the automatic start and stop, pressure regulation, and alarm functions (such as overpressure and overheating) are sensitive.
  • Q What are some common quality inspection failures of air compressors?

    A
    * Performance does not meet the standard: insufficient exhaust volume, power ratio exceeds the standard.
    * Safety hazards: safety valve failure, pressure vessel weld defects.
    * Noise/vibration exceeds the standard: usually due to poor rotor dynamic balance or unstable installation.
    * Oil leakage/air leakage: aging of seals or improper assembly.
  • Q What should the user check when accepting the air compressor?

    A
    * Document Verification: Certificate, test report, instruction manual.
    * Visual Inspection: No transportation damage, no loose fasteners.
    * Trial Run: Verify that the no-load starting current is within the normal range.
    * Performance Test: Ensure stable pressure output and normal temperature during load operation.
    * Functional Check: Confirm proper operation of the automatic drain valve and air filters.
  • Q How to inspect the quality of the air compressor after repair?

    A
    * Repair Validation: Re-test the specific components that were repaired—e.g., if the airend is replaced, verify discharge volume and vibration levels.
    * Critical Component Check: Ensure correct installation and alignment of key parts such as bearings, seals, and couplings.
    * System Performance Test: The unit must operate continuously for 24 hours without abnormalities before being approved for acceptance.
  • Q Recommendation for quality inspection cycle

    A
    * Daily Inspection: Record operating parameters (pressure, temperature, current) every week.
    * Regular Inspection: Entrust a third party to test energy efficiency and compressed air quality every 6-12 months.
  • Q How to deal with unqualified quality inspection?

    A Negotiate with the supplier: return or repair according to the contract requirements.
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Telephone: +86-173-2106-2761
 WhatsApp: +8617321062761
Email: Anna@rockymachinery.com
 Address: Room 604, #12, Powerlong Center, No.689 Xiwang Road, Jiading District, Shanghai, China
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