NXQ-A-40/31.5-L-Y Hydraulic Bladder Accumulator 31.5Bar

Product Overview

The NXQ / NXQA / NXQAB Series High-Pressure Bladder Accumulators (including standard configuration codes like NXQ-A-40/31.5-F-Y, NXQ-A-0.63/20-L-Y, and capacity variations from 0.63L to 40L) are engineered for fluid energy storage, system pressure stabilization, and shock/pulsation dampening in industrial hydraulic systems. Manufactured in strict compliance with national and international hydraulic pressure vessel standards, this series features standard flange (F) or threaded (L) fluid connections, offering 100% drop-in mechanical and hydraulic interchangeability with mainstream global accumulator brands. The accumulator shell is forged from premium alloy steel or high-tensile seamless tubing, housing a high-resilience, oil-resistant Nitrile (NBR) rubber bladder. Every unit undergoes 100% hydrostatic proof testing and rigorous nitrogen leak detection prior to shipment, ensuring reliable operation across 10 MPa, 20 MPa, and 31.5 MPa operating pressures.

Technical Specifications 

• Full Model Examples: NXQ-A-40/31.5-F-Y / NXQ-A-0.63/20-L-Y (Covering NXQ, NXQA, NXQAB series)

• Nominal Capacities: Full range from 0.63L, 1.6L, 4L, 6.3L, 10L, 16L, 25L, to 40L

• Rated Working Pressures: 10 MPa (100 bar) / 20 MPa (200 bar) / 31.5 MPa (315 bar)

• Operating Fluid Temp Range: -20°C to +70°C (with standard NBR bladder)

• Pre-charge Gas Medium: Pure Nitrogen Gas (N2​, purity $\ge 99.8\%$)

• Fluid Port Configurations: F Type (Flanged connection) or L Type (Female threaded connection)

• Design Structure: Type A (Top-repairable bladder design with gas valve)

• Net Weight: Approx. 4.5 kg (0.63L) to 135 kg (40L)

Key Technical Advantages

• 100% Drop-In Industry Standard Fit: Mounting dimensions, flange/thread patterns, and top gas charging interfaces match universal industry standards, allowing fast, modification-free field replacements.

• High-Tensile Seamless Forged Shell: The cylinder body is crafted from superior carbon alloy steel via seamless processing, delivering uniform wall thickness and exceptional resistance to high-pressure fatigue cycles.

• Low-Permeation Seamless Bladder: Manufactured using advanced vulcanization molding to provide high gas tightness, preventing nitrogen gas from permeating into the hydraulic fluid during high-cycle operations.

• 100% Rigorous Factory Proof Tested: Every single shell is subjected to hydrostatic burst-prevention testing at 1.5 times its rated working pressure along with high-precision pressure-decay leak detection.

Application Areas

• Heavy Machine Tools & Presses: Hydraulic press rapid ram descent circuits, clamping cylinder energy storage, and punch press stabilization.

• Metallurgy & Mining Machinery: Rolling mill hydraulic servo pulsation dampening and heavy-duty mining hydraulic support stations.

• Mobile & Construction Equipment: Concrete pump truck boom vibration dampening and mobile crane braking accumulators.

• Marine & Offshore Engineering: Deck machinery tensioning systems and emergency backup power for marine Hydraulic Power Units (HPUs).

Expert Maintenance Tips

• Never Charge with Oxygen or Compressed Air: Strictly prohibited from using oxygen or compressed air inside the bladder! Always use industrial pure nitrogen ($\ge 99.8\%$ purity) to avoid severe explosion hazards under high oil pressure.

• Proper Pre-charge Pressure (P0​) Setup: Set the pre-charge pressure according to system application. For energy storage, set P0​ to approximately 90% of the minimum system operating pressure; for pulsation dampening, set it to 60%–75% of the average working pressure.

• Routine Pressure Inspections: Check the pre-charge gas pressure monthly during the first month of service, and perform routine checks every 3 to 6 months thereafter using a dedicated charging and testing kit. Recharge if pressure drops more than 10%.