OEM Factory Custom Hydraulic Proportional Pressure Relief Valve

Premium Quality Hydraulic Cylinders - Quality Assured

• 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 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.

• Cost Efficiency: Wholesale factory pricing reduces procurement costs significantly.
• Precise Electronic Control: Enables stepless, dynamic pressure adjustment for optimal system response and process accuracy.
• Energy Savings: Reduces system pressure losses, lowering power consumption and heat generation.
• Custom Integration: OEM tailoring ensures perfect fit, porting, electrical interfaces, and performance specs for your machinery.
• High Reliability: Robust construction withstands industrial environments, contamination, and pressure spikes.
• Reduced Noise/Vibration: Smooth proportional operation minimizes system shock and noise.

• Max. Pressure (Bar): 21, or customized based on your request
• Max Flow (l/min): 160, or customized based on your request
• Other Technical Parameters: Customized based on your request
• Brand: Guoyue
• Sample: Available
• Drawings: Available

Who are we?
We are based in Jiangsu, China, starting from 2022, selling 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.

How can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

What can you buy from us?
hydraulic cylinder, hydraulic cylinder, Single-acting hydraulic cylinder, Double-acting hydraulic cylinder, construction machinery hydraulic cylinder

Why should you buy from us not from other suppliers?
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

What services can we provide?
Accepted Delivery Terms: FOB;
Accepted Payment Currency: USD, EUR;
Accepted Payment Type: T/T;
Language Spoken: English, Chinese