• Internals: Cylinder barrel adopts GUOYUE EU/US metallurgical standard CD250 structure. Barrel material: 45#, 42CrMo, or 27SiMn. Bore honed to H8 precision with surface roughness Ra<0.4μm. Heads, base, trunnions, and pistons are exclusively made of 45# steel; no cast iron or cast steel components are used.
• Buffering: Multiple buffering options including fixed and floating buffer structures to ensure effective deceleration across various pressures and speed ranges.
• Welding: 100% ultrasonic impact treatment applied to all pressure-bearing and load-critical welds. This eliminates weld stress (removal rate ≥90%) and significantly enhances weld fatigue strength.
• Sealing: All cylinders exclusively use premium imported seals from Japan NOK, Sweden Trelleborg, Germany Merkel, and GP. No domestic seals are utilized.
• Testing & Certification: Factory testing strictly complies with GB/T15622-2005 "Hydraulic Fluid Power - Test Methods for Cylinders" and internal premium standard Q/GAKY014-2023. Includes provision of factory test reports and product qualification certificates.
• Warranty: One-year warranty from shipment date. Free repair or replacement provided for defects arising from design or manufacturing within the warranty period.

Essential for foundry equipment, steel mill pushers, and heavy-duty presses. Used in shipyard launching systems, dam gate actuators, and mining machinery. Ideal for long-stroke industrial applications requiring linear force in metal processing, civil engineering, and material handling where reliability outweighs return-stroke complexity.

We are based in Jiangsu, China, start from 2022,sell to Domestic Market(40.00%),Africa(10.00%),North America(10.00%),South America(8.00%),Southeast Asia(6.00%),Western Europe(5.00%),Eastern Europe(5.00%),Mid East(5.00%),Central America(5.00%),Eastern Asia(2.00%),Oceania(2.00%),Northern Europe(1.00%),South Asia(1.00%). There are total about 51-100 people in our office.

Always a pre-production sample before mass production;
Always final Inspection before shipment;

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Guoyue Hydraulic Equipment Manufacturing (Jiangsu) Co., Ltd., with a registered capital of 50 million yuan, is a private technology enterprise that integrates research, design, development, production, operation, and service. The company specializes in the

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