NXQ Series Bladder Accumulator | NXQ-A-6.3/31.5-L-Y | 10MPa 20MPa 31.5MPa High Pressure | Energy Storage

The NXQ Series Bladder Accumulator by Chengyuan Hydraulic is a high-performance energy storage component designed to stabilize pressure and absorb hydraulic shocks. By utilizing the compressibility of nitrogen, these units store fluid under pressure and release it as needed for emergency power or pulse damping. Fully compliant with international and domestic standards (GB/T 150), our NXQ series offers 100% original-place interchangeability for leading brands like Rexroth and Hydac. Every unit undergoes 100% simulated condition testing and rigorous gas-tightness verification, ensuring safety and peak performance in high-pressure environments up to 31.5 MPa.

Technical Specifications 

• Model Series: NXQ-A/L (Standard Threaded or Structural Optimized)

• Nominal Volumes: 0.63L, 1L, 1.6L, 2.5L, 4L, 6.3L, 10L, 20L, 25L, 40L, 60L

• Nominal Pressure (PN): 10 MPa (1450 psi), 20 MPa (2900 psi), 31.5 MPa (4560 psi)

• Fluid Medium: L (Mineral Oil), Y (Phosphate Ester or Water-Glycol)

• Working Temperature: -10°C to +70°C (subject to bladder material)

• Shell Material: High-tensile Seamless Forged Steel

• Bladder Material: Premium NBR, IIR, or FKM (Viton)

• Charging Gas: Nitrogen ($N_2$) ONLY

Key Technical Advantages

• Seamless Forged Shell Construction: Our shells are manufactured using premium alloy steel through a specialized forging process. The polished inner surface minimizes friction between the shell and the bladder, significantly enhancing durability under 31.5 MPa cycles.

• High-Elasticity Bladder Engineering: Utilizing advanced rubber compounds, our bladders feature ultra-low permeability and high resilience. The specific folding design ensures fatigue resistance during high-frequency charging and discharging.

• 100% Stringent Testing Protocols: Unlike competitors, we perform a 24-hour nitrogen pressure-holding test and hydraulic strength test on every single unit. This guarantees zero leakage and absolute structural integrity in the field.

• Optimized Valve & Port Design: Featuring standard gas valves for easy maintenance and a precision poppet valve at the oil port to prevent bladder extrusion during rapid discharge, ensuring stable and high-flow operation.

Application Areas

• Construction Machinery: Shock absorption and auxiliary power for excavators and cranes.

• Metallurgy & Steel: Rapid response power compensation for rolling mills and shearing machines.

• Wind Energy: Emergency braking and pressure maintenance for pitch control systems.

• Industrial Presses: Power assistance for rapid clamping in injection molding and die-casting machines.

Expert Maintenance Tips

• Nitrogen Safety: Never fill the accumulator with oxygen, compressed air, or flammable gases. Only high-purity nitrogen should be used with dedicated charging kits.

• Pre-charge Monitoring: Check the pre-charge pressure ($P_0$) weekly during the first month of operation and bi-annually thereafter. Ensure $P_0$ is maintained within 0.6 to 0.9 times the system’s working pressure.

• Mounting Position: For optimal performance and bladder life, mount the accumulator vertically with the gas valve facing upwards, using secure mounting brackets to minimize vibration.