NXQ Bladder Accumulator | NXQ-A-10/31.5 | High Pressure

Genlu Hydraulic’s meticulously manufactured NXQ Series Bladder Accumulators are critical safety and efficiency components designed for industrial and mobile hydraulic systems. They serve to store energy, dampen pressure pulsations, and absorb hydraulic shocks. This series spans a comprehensive range from the compact NXQ-A-0.4 to the mid-sized NXQ-A-10, with pressure ratings from 20 MPa to 31.5 MPa to suit diverse operational demands.

Acting as your hydraulic system’s “voltage stabilizer,” Genlu’s NXQ series utilizes high-elasticity Nitrile Butadiene Rubber (NBR) bladders, offering superior airtightness and chemical resistance. Designed to adhere to international standard dimensions, these units offer 100% Drop-in Interchangeability with major brands like Rexroth and Parker. Every accumulator undergoes rigorous 100% pressure vessel fatigue testing and nitrogen leak validation before dispatch, ensuring safe and stable power storage in high-pressure, high-frequency environments.

Technical Specifications 

• Product Series: NXQ-A Series (Standard Bladder Accumulator)

• Representative Models:

  • NXQ-A-0.4/20 (0.4 Liter, 20 MPa)

  • NXQ-A-0.4/30 (0.4 Liter, 30 MPa)

  • NXQ-A-10/31.5 (10 Liter, 31.5 MPa)

• Nominal Capacity: 0.4 L to 10 L (Full range available)

• Rated Pressure: 20 MPa, 31.5 MPa

• Bladder Material: Oil-resistant Nitrile Rubber (NBR); specialized materials (FKM/EPDM) available for specific media compatibility

• Connection Style: Standard bottom threaded connection (integrated with gas charging valve)

• Mounting Orientation: Vertical (recommended) or horizontal

• Operating Temperature: -20°C to +80°C

Key Technical Advantages:

• High-Elasticity Anti-Fatigue Bladder: Crafted from premium high-polymer composite materials, these bladders boast an exceptional elastic modulus and fatigue lifespan. Even under micro-pulsations of thousands of cycles per minute, they maintain a stable gas/liquid barrier without premature rupture.

• Precision Forged Shell Construction: The shell is manufactured via precision forging from high-quality carbon steel, finished with anti-oxidant and anti-corrosive coatings. The interior is polished to minimize gas permeation, ensuring the accumulator maintains high structural safety factors at maximum operating pressures.

• Anti-Extrusion Safety Valve Design: Featuring a highly sensitive bottom-mounted safety valve. If the bladder expands excessively due to low system pressure, this valve prevents the bladder from being extruded into the oil port, effectively avoiding damage and extending the unit’s operational life.

• Simplified Maintenance & Charging: The ergonomically designed top charging valve supports quick-connect charging tools. Gas pressure can be rapidly verified with a simple gauge, drastically reducing the complexity and safety risks of field maintenance.

Application Areas:

• Energy Storage & Auxiliary Power: Providing stored pressure oil to assist actuators when primary pump flow is insufficient.

• Pressure Pulsation Dampening: Absorbing high-frequency fluid oscillations from piston or gear pumps, significantly reducing pipeline vibration and acoustic noise.

• Hydraulic Shock Absorption: Buffering severe “water hammer” surges created by high-speed directional solenoid valve switching or sudden cylinder stops.

• Emergency Power Units: Providing emergency pressure oil for braking systems or critical fail-safe valve closure if the prime mover stalls or power is lost.

Expert Maintenance Tips:

• Nitrogen Pre-charge Before Installation: Accumulators are typically shipped with only minimal protective nitrogen. Before commissioning, use a specialized charging tool to pre-charge the bladder with nitrogen according to the system’s actual operating parameters (typically 60%-90% of the minimum working pressure).

• Prohibited Gases: Never use oxygen or compressed air to charge the bladder; doing so risks catastrophic explosion. Only use high-purity Nitrogen ($N_2$).

• Periodic Pressure Verification: Check the accumulator pre-charge pressure quarterly. If the pressure drops by more than 20%, it often signals a micro-leak in the bladder or a compromised seal in the charging valve. Timely maintenance is required to prevent system control failure.