Dongxu PED-Approved Welded Diaphragm Type Hydraulic Energy Storage Unit

Dongxu Welded Diaphragm Accumulators are designed and manufactured in strict compliance with EU standards and the PED (Pressure Equipment Directive). Featuring a fully welded shell and a highly elastic rubber diaphragm, they completely isolate nitrogen from hydraulic oil. These accumulators store and release energy through gas compression, offering advantages such as zero leakage, extremely fast response times, compact size, and light weight. They are widely used in European-standard precision hydraulic systems for pressure stabilization, shock absorption, pulsation suppression, and energy compensation.

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Type parameter list

Note: For metric (GB), inch (ASME), and imperial (ISO) standards, please refer to the common liquid-end connection thread options!

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Key Features

• PED Certified Safety: Fully compliant with EU Pressure Equipment Directive standards for safe use in European industrial environments.
• Integral Welded Construction: Seamless welded shell delivers high structural strength, fatigue resistance, and long-term zero gas leakage performance.
• Ultra-Fast Response Diaphragm: High-elastic rubber diaphragm enables millisecond-level pressure compensation, ideal for high-frequency, precision hydraulic systems.
• Complete Gas-Oil Isolation: The diaphragm fully separates nitrogen gas and hydraulic oil, minimizing gas loss and eliminating cross-contamination risks.
• Compact & Lightweight Design: Small footprint and low weight make it perfect for applications with limited installation space.
• Wide Compatibility: Available with NBR, EPDM, or FKM diaphragms to suit mineral oils, synthetic fluids, and various working temperatures (-10°C to +80°C).
• Standardized Connections: Equipped with BSPP (G-thread) or DIN standard ports for easy installation and universal system compatibility.

• Pressure Holding & Leakage Compensation: Precision machine tools, hydraulic test benches, European standard mini hydraulic stations.
• Energy Saving & Peak Load Reduction: Small‑flow high‑frequency hydraulic circuits, reduce pump power and energy consumption.
• Emergency Power Supply: Safety brakes, clamping devices and critical actuators during power failure in precision equipment.
• Industrial Mobile & Compact Hydraulics: Aerial work platforms, small cranes, forklifts, and agricultural machinery with limited space.
• General & Precision Hydraulics: Injection molding machines, die‑casting machines, metallurgical equipment and laboratory hydraulic systems.

• Secure Industrial Protection: Each cooler is individually packaged in reinforced, shock-absorbent crating to protect the cooling core and fittings during transit.
• Global Fulfillment: Factory-direct dispatch with optimized logistics support to reach industrial hubs in Europe, North America, and Asia with minimal lead time.
• Documentation Ready: Provided with full technical and export documentation to ensure hassle-free customs clearance and installation.

• Global Standards: Manufactured under strict ISO9001, ISO14001, and ISO10012 quality management systems.
• Long-Term Reliability: Engineered for an operational lifespan of 10+ years, providing a foundation of stability for your heavy-duty machinery.
• Rigorous Integrity Testing: Every DC unit undergoes comprehensive pressure-testing to ensure leak-free operation and structural durability under load.

The MEISON Advantage 

• Factory-Direct Expertise: "Factory-Direct Expertise. Professionally Curated." — 20+ years of manufacturing leadership in hydraulic components.
• Global Trusted Partner: Over 1,000,000 units sold to 6,000+ satisfied customers worldwide.
• Innovation & R&D: 60+ technical patents support our commitment to high-performance, precision-engineered hydraulic components.
• Cinematic Industrial Image: Our design focus on technical authority and professional aesthetics helps you build immediate, long-lasting trust with your B2B customers.