NXQ-6.3L Bladder Type Hydraulic Accumulator | NXQ1-L0.63/10/20/31.5-H | National Standard

The NXQ Series Bladder Type Hydraulic Accumulator by Chengyuan Hydraulic is a high-performance auxiliary component engineered to National Standards (GB). Designed for energy storage, leakage compensation, and pressure pulsation absorption, it serves as a critical safety and efficiency element in modern hydraulic circuits. Our NXQ series features seamless forged shells and high-resilience bladders. Each unit undergoes 100% simulated condition testing to ensure structural integrity and functional reliability, offering 100% interchangeability with major national and international standard brands.

Technical Specifications (Bulleted List)

• Nominal Volume: $0.63\text{ L}$ to $6.3\text{ L}$ (Standard L0.63 models)

• Specific Models: NXQ1-L0.63/10-H, NXQ1-L0.63/20-H, NXQ1-L0.63/31.5-H

• Nominal Pressure: $10\text{ MPa}, 20\text{ MPa}, 31.5\text{ MPa (up to 4568 psi)}$

• Applicable Media: Mineral-based hydraulic oil, Water-glycol

• Medium Temperature: $-10\text{ to }+70\text{°C}$

• Shell Material: $35\text{#}$ Premium Carbon Steel (Seamless Forging)

• Bladder Material: Nitrile Rubber (NBR) / Viton (FKM, Optional)

• Inlet Port: Compliant with National Standard thread or flange interfaces

Key Technical Advantages

• Seamless Forged Shell Design: The shell is manufactured using advanced hot-spinning or cold-extrusion forging techniques. The weld-free construction eliminates potential leakage points and provides superior fatigue resistance under high-pressure cycling.

• High Gas-Tightness Bladders: Our bladders are crafted from specially formulated NBR, offering extremely low gas permeability and excellent resistance to hydraulic fluids, ensuring longevity during rapid charge and discharge cycles.

• Optimized Flow Poppet Valve: The integrated poppet valve at the oil port prevents bladder extrusion during rapid discharge while allowing maximum flow rates with minimal pressure drop.

• Superior Pulse Damping: Due to the ultra-low inertia of the gas-filled bladder, the NXQ series reacts instantly to pressure ripples, effectively reducing system noise and protecting sensitive components from hydraulic shock.

Application Areas

• Machine Tools: Pressure compensation for clamping and tool-changing mechanisms.

• Injection Molding: Providing supplemental flow for high-speed injection phases.

• Power & Energy: Emergency shutdown power for turbine control systems and wind turbines.

• Heavy Construction: Energy recovery and suspension damping for mobile machinery.

Expert Maintenance Tips

• Nitrogen Charging: ONLY use Nitrogen gas ($N_2$). Never use oxygen or compressed air, as this poses a high risk of internal explosion.

• Pre-charge Ratio: Generally, the pre-charge pressure should be $60\%\text{–}90\%$ of the minimum system working pressure for optimal bladder life.

• Routine Inspection: Inspect the pre-charge pressure every six months. A significant drop in pressure indicates a potential leak in the gas valve or a damaged bladder.