SUN Hydraulics Cartridge Valve | CXJA-XCN CXDA-XCN CBCG-LJV | Check & Counterbalance Valves

Chengyuan Hydraulic offers high-performance replacement solutions for SUN Hydraulics cartridge valves, accurately covering check valves (CXJA/CXDA/CXAD), counterbalance valves (CBCG), pressure reducing valves (DWDA), and relief valves (MWIM). The engineering core of SUN’s value lies in its unique Floating Construction. Chengyuan meticulously replicates this process during manufacturing, ensuring the valve sleeve can float slightly within the cavity. This fundamentally eliminates the risk of spool binding caused by excessive installation torque or manifold machining tolerances. All models offer 100% Drop-in Interchangeability. With Chengyuan’s 100% Simulation Load Testing System, every valve is rigorously verified for pressure pulsation, flow linearity, and leakage before shipping, ensuring original-standard performance in extreme industrial environments.

Technical Specifications 

• CXJA-XCN: Free-flow check valve, T-5A cavity, 160 L/min max flow, 350 bar rated pressure, 0.3 bar cracking pressure.

• CXDA-XCN: Free-flow check valve, T-13A cavity, 40 L/min max flow, 350 bar rated, 0.3 bar cracking pressure.

• CXAD-XCN: Free-flow check valve, T-162A cavity, 320 L/min max flow, 350 bar rated.

• CBCG-LJV: Counterbalance valve, T-2A cavity, 3:1 pilot ratio, 60 L/min max flow, 140-280 bar set range.

• MWIM-XKN: Proportional relief valve, T-8A cavity, 210 bar max, 0.4-2 L/min flow for pilot control.

• DWDA-XAN: Pressure reducing valve, T-11A cavity, 350 bar max inlet, 40 L/min max flow.

• Control Type: X (Standard screw), L (Manual lever), K (Adjustment with cap).

• Material: High-strength alloy steel internal parts, stainless external parts, FKM (V) or NBR seals.

Key Technical Advantages:

• Floating Sleeve Technology: The valve assembly allows for self-alignment during installation. This two-stage structure enables the valve to withstand installation torques 50% higher than competitors without affecting spool precision, greatly improving manifold assembly reliability.

• High-Pressure Sealing Integrity: Sealing surfaces are precision-lapped to micron tolerances. Combined with hardened alloy steel spools, this ensures minimal internal leakage (less than 5 drops/min) at 350 bar, maximizing system volumetric efficiency.

• Superior Dynamic Response: Validated by Chengyuan’s simulation testing, the CBCG and relief series exhibit minimal pressure overshoot during transients, ensuring smooth, vibration-free movement for mechanical arms or crane booms.

• Anti-Corrosion & Wear Resistance: External bodies are chemically nickel-plated or phosphated, while internal moving parts are high-frequency quenched to 60+ HRC to resist erosion from microscopic particulates.

Application Areas:

• Mobile Machinery: Hydraulic locking and balance circuit control for excavators and cranes.

• Injection Molding: Pressure control and flow retention for mold opening/closing systems.

• Hydraulic Integrated Circuits (HIC): Pressure management, safety relief, and load holding in custom manifolds.

• Agricultural Equipment: Overload protection for tractor suspension systems and hydraulic motors.

Expert Maintenance Tips:

• Torque Compliance: Despite the floating design, always follow the recommended torque (e.g., 45-50 Nm for T-5A cavity) to avoid damaging manifold threads.

• Filtration Integrity: Pilot-controlled models (e.g., MWIM/DWDA) are highly sensitive to contamination; ensure system filtration is maintained below 10 microns.

• Drain Backpressure Monitoring: When installing reducing or counterbalance valves, monitor backpressure at the drain port, as excessive backpressure will directly shift the valve’s set point.