SUN Hydraulics Cartridge Valve | CXGE-XCN CXBA-XCN CBFA-LHN CWCG-LFN | High Pressure Check & Counterbalance Valve

Chengyuan Hydraulic offers a comprehensive range of high-performance screw-in cartridge valves, precision-engineered as premium replacements for SUN Hydraulics technical standards. Our portfolio includes check valves (CXGE, CXBA, CXJA), counterbalance valves (CWCG, CBDG, CBFA), and relief valves (RDDA). Following the renowned “Floating Construction” design, our valves eliminate the risk of internal binding due to excessive installation torque. Chengyuan guarantees 100% Drop-in Interchangeability for all T-Series cavities. Every valve is subjected to 100% simulation load testing on our digital benches to ensure precise control, minimal leakage, and extended service life in high-pressure environments.

Technical Specifications

• Compatible Brand: SUN Hydraulics

• Target Model Codes: CXGE-XCN, CXCE-XCN, CXED-XCN, CXJA-XCN, CXBA-XCN, CWCG-LFN, CBDG-LJN, CBFA-LHN, RDDA-LCN

• Valve Functions: Free-flow Check, Counterbalance (Load-holding), Direct-acting Relief

• Max. Operating Pressure: 350 bar (5000 psi)

• Flow Rate Range: 40 L/min to 480 L/min (Depending on frame size e.g., T-11A, T-2A, T-17A)

• Cracking Pressures: 0.3 bar, 1 bar, 2 bar (Standard options available)

• Pilot Ratios: Counterbalance series available in 3:1, 4.5:1, 10:1 ratios

• Material: High-strength steel housing with heat-treated internal components

• Seals: NBR (Standard), Viton (Optional)

Key Technical Advantages:

• Floating Construction: Adhering to the original SUN engineering concept, the internal working parts are self-aligning. This prevents spool binding caused by cavity machining inaccuracies or over-torquing, significantly enhancing operational reliability.

• High Flow Capacity & Low Pressure Drop: The internal flow paths are CFD-optimized to provide maximum flow with minimum restriction. The CX check valve series exhibits superior hydraulic efficiency in the fully open position.

• Precision Heat Treatment: All spools and seats are crafted from high-grade alloy steel and vacuum-hardened (HRC 60+). This provides exceptional resistance to fluid erosion and abrasive wear from contaminants.

• Total Interchangeability: Strictly compliant with SUN’s T-Series cavity standards, allowing for direct replacement in existing manifolds without any modifications.

Application Areas:

• Construction Machinery: Vital for load-holding in excavators and crane boom circuits to prevent accidental drifting.

• Material Handling: Used in forklift and telehandler lifting systems for precise positioning and safety.

• Hydraulic Manifold Integration: Ideal for compact system designs, reducing overall footprint and piping complexity.

• Mobile Equipment: Pressure control and load-holding in agricultural and forestry machinery.

Expert Maintenance Tips:

• Torque Specifications: Always follow the recommended installation torque for the specific T-Series cavity. While the floating design is robust, excessive force can damage threads or seal integrity.

• Filtration Standards: Maintain system oil cleanliness at ISO 4406 19/17/14 or better to ensure the longevity of the precision-honed internal components.

• Seal Inspection: Prior to re-installation, inspect O-rings and backup rings for cuts or aging. A light coating of clean hydraulic oil on the seals is recommended to facilitate smooth installation.