NXQ Bladder Accumulator | NXQ-L0.63 NXQ-L1 NXQ-L1.6 NXQ-L2.5 | High Pressure Hydraulic Accumulator

LIC Hydraulic’s NXQ Series Bladder Accumulators are essential components for modern hydraulic systems requiring energy storage and surge suppression. Compliant with GB/T 150 pressure vessel standards, the NXQ series (including NXQ-L0.63, L1, L1.6, and L2.5) utilizes a seamless steel shell and a high-elasticity rubber bladder. It acts as a “hydraulic battery,” storing energy during low-demand periods and releasing it instantly when needed. Whether for boosting cycle times or dampening vibration, the NXQ series provides a reliable, high-response solution for global industrial applications.

Technical Specifications

• Nominal Volume: 0.4L, 0.63L, 1.0L, 1.6L, 2.5L (up to 160L available)

• Pressure Ratings: 10 MPa, 20 MPa, 31.5 MPa

• Medium: Mineral oil, Water-glycol (with compatible bladder)

• Operating Temp: -10°C to +70°C

• Standard: National Standard GB/T 150

• Connection: Threaded (L) or Flanged options

• Bladder Material: High-performance NBR (Nitrile) standard; EPDM/Viton optional.

Key Technical Advantages

• Ultra-Fast Response: The low-inertia bladder reacts in milliseconds to absorb hydraulic shocks (water hammer), protecting sensitive pumps and valves.

• Gas-Liquid Isolation: Superior bladder sealing prevents nitrogen from dissolving into the hydraulic oil, ensuring stable actuator performance without “spongy” operation.

• Compact & Durable: The cold-drawn seamless shell offers maximum safety with a smaller footprint, ideal for mobile machinery and integrated HPU blocks.

• Cost-Effective Maintenance: Bladders are easily replaceable, allowing for extended shell life and reduced total cost of ownership (TCO).

Application Areas

• Machine Tools: Pressure maintenance for clamping and fast-travel tool changers.

• Hydraulic Power Units (HPU): Energy saving by reducing pump size and managing peak demand.

• Construction Machinery: Pilot circuit stabilization and steering shock absorption.

• Renewable Energy: Emergency pitch control and braking systems for wind turbines.

Expert Safety & Maintenance Tips

• Nitrogen Only: NEVER fill an accumulator with Oxygen or Compressed Air. This will result in a violent explosion. Use only 99.5% pure Nitrogen ($N_2$).

• Pre-charge Optimization: The pre-charge pressure ($P_0$) should generally be set at 0.7 to 0.9 times the minimum system operating pressure. Incorrect $P_0$ is the leading cause of bladder failure.

• Mounting Position: For optimal life, install the accumulator vertically with the gas valve at the top. This prevents the bladder from rubbing unevenly against the shell walls.

• Pressure Inspection: Check pre-charge levels at least every 6 months to ensure the system remains efficient and the bladder remains fully protected.