NXQ Series Hydraulic Bladder Accumulator | NXQA NXQAB | 10MPa 20MPa 31.5MPa

The NXQ Series from LIC Hydraulic is a premier line of Bladder Accumulators designed to enhance the efficiency and safety of high-pressure hydraulic systems. Models such as the NXQ-A-2.5/31.5-Y act as essential “energy buffers,” storing hydraulic potential by compressing an internal gas-filled bladder. Whether you need to store energy for peak demand, absorb shock, or maintain system pressure, the NXQ series offers a reliable, low-maintenance solution. We provide 100% drop-in replacements, with each unit certified to meet rigorous global safety standards for pressure vessels.

Technical Highlights

• Volume Range: $0.4\text{ L}$ to $250\text{ L}$.

• Pressure Classes: $10\text{ MPa}$, $20\text{ MPa}$, and $31.5\text{ MPa}$ ($1450\text{–}4568\text{ psi}$).

• Material: Seamless forged steel shell with optimized fatigue-resistant bladders.

• Medium: Mineral oil, water-glycol, or chemical-resistant fluids (custom).

Core Advantages

• Instantaneous Energy Release: The gas-filled bladder responds almost instantly to system fluctuations, making it perfect for rapid-cycle applications like die-casting or plastic injection.

• Superior Fluid Isolation: The high-grade rubber bladder ensures zero contact between the nitrogen and hydraulic fluid, preventing aeration and foam generation.

• Robust Construction: Each shell is forging-formed and tested at $1.5\times$ its rated pressure, ensuring safety and durability under continuous high-pressure cycles.

• Modular Maintenance: The NXQ-AB (Large Opening) design allows for easy bladder inspection and replacement without disconnecting the accumulator from the main hydraulic line.

Expert Maintenance Tips

• Nitrogen Only: NEVER fill an accumulator with oxygen or compressed air. This can cause a violent explosion. Always use high-purity Nitrogen ($N_2$).

• Pre-charge Pressure: As a general rule, the pre-charge pressure ($P_0$) should be set to $60\%\text{–}90\%$ of the minimum working pressure. If $P_0$ is too high, the bladder will hit the anti-extrusion valve, leading to premature failure.

• Vertical Installation: While some smaller units can be installed horizontally, it is highly recommended to install the NXQ series vertically with the oil port at the bottom for maximum bladder life and performance.