How the DLC Stamp Reflects Donloucos Quality Standards.

When sourcing hydraulic cylinder parts for critical applications, quality assurance isn't optional - it's essential. Donlouco's DLC stamp represents more than a mark; it's your assurance of ISO 9001 and EN 1090 certified manufacturing excellence that meets the most demanding requirements for hydraulic systems.

1. ISO 9001 & EN 1090 Certified Quality Management Systems.

Donlouco operates under ISO 9001 and EN 1090 certifications, which are internationally recognised standards for quality assurance and structural steel CE marking. These certifications require strict controls over every step of the production process, from material sourcing to final inspection, ensuring that all components meet or exceed customer and regulatory requirements.

2. Hydraulic Parts Quality Control: Comprehensive Testing Standards.

Every part with the DLC stamp has undergone thorough quality checks, including:

Dimensional tolerance verification (±0.005mm accuracy).
Surface finish assessment (Ra values documented).
Material certification with chemical composition analysis.
Non-destructive testing protocols (ultrasonic, magnetic particle inspection).
Pressure testing to 1.5x working pressure ratings.
Fatigue testing for hydraulic cylinder applications.

3. Manufacturing Traceability: Complete Documentation Standards.

The DLC stamp ensures that each part is fully traceable, with supporting documentation, including material certificates, dimensional reports, and inspection records, provided with every shipment. This traceability is essential for compliance with ISO 9001, EN 1090, and customer-specific standards.

4. On-Site and Independent Verification.

Donlouco’s quality assurance includes both in-house inspections and independent laboratory testing, ensuring that parts not only meet internal standards but are also validated by third-party experts. This dual-layer verification reinforces reliability and customer confidence.

5. Local Accountability, Global Reach.

The DLC stamp also reflects Donlouco’s unique approach: having qualified engineers and quality managers on the ground, combined with our own office in China, and Irish-based project management, planning, scheduling, etc. This ensures consistent quality, timely issue resolution, and seamless communication for customers in Ireland and Europe.

DLC Stamp of Quality.