NXQ Series Bladder Accumulator | NXQ-L1/20-H NXQ-L1.6/31.5-H | High Pressure Hydraulic Accumulator

The NXQ Series bladder accumulators from Chengyuan Hydraulic are essential components for energy storage and pulsation dampening in high-pressure hydraulic systems. Featuring a high-strength seamless steel shell and a highly resilient, fatigue-resistant rubber bladder, the NXQ series is designed to handle demanding industrial cycles. For models like NXQ-L1/20-H and NXQ-L1.6/31.5-H, we ensure 100% original-place interchangeability for all gas and oil ports. Every unit undergoes a 1.5x rated pressure hydrostatic safety test before dispatch, guaranteeing reliability and safety under high-frequency oscillation, serving as a perfect OEM replacement.

Technical Specifications :

• Series Type: NXQ (Bladder Type)

• Nominal Volume: 1.0 Liter (L1) / 1.6 Liters (L1.6)

• Rated Pressure: 20 MPa (200 bar) / 31.5 MPa (315 bar)

• Media: Mineral oil, Water-glycol, or Emulsions (depending on bladder material)

• Operating Temp: -10°C to +70°C (NBR) / -20°C to +120°C (Viton/FKM)

• Connection Type: L (Threaded Connection)

• Gas Port Interface: M14×1.5 or 5/8-18UNF standard

• Shell Material: High-quality 35# or 45# seamless steel

Key Technical Advantages:

• Seamless Forged Shell Technology: The NXQ shells are formed using advanced hot-spinning or internal extrusion processes, eliminating stress points found in welded structures. The internal surface is polished to prevent abrasions on the bladder during expansion, significantly extending the bladder’s cycle life.

• Low-Permeability Bladder Compounds: We utilize premium synthetic rubber formulas with gas permeability resistance 20% higher than industry averages. This ensures stable precharge pressure even during long-term operation at 31.5MPa.

• Optimized Poppet Valve Design: The integrated oil-side poppet valve prevents the bladder from being extruded into the oil port during full expansion. The streamlined flow path through the valve minimizes pressure drop during high-flow discharge phases.

• 100% Safety Compliance: Chengyuan strictly adheres to pressure vessel safety standards. Every NXQ accumulator is double-tested for air tightness and hydrostatic strength, providing dependable emergency power for heavy-duty machinery or forging presses.

Application Areas:

• CNC Machine Tools: Used as an auxiliary energy source to reduce pump size and compensate for internal leakage.

• Industrial Power Units: Absorbing pressure ripples from pumps to reduce system vibration and noise.

• Injection Molding: Providing instantaneous high flow for rapid clamping or injection cycles.

Expert Maintenance Tips:

• Precharge Pressure Accuracy: It is recommended to set the nitrogen precharge pressure (P0) at 0.9 times the minimum system working pressure. Incorrect P0 leads to excessive bladder folding and premature fatigue failure.

• Nitrogen Only: Never use oxygen or compressed air to precharge the accumulator. Only use Nitrogen (purity ≥99.5%) to avoid explosion risks.

• Periodic Inspection: Check the nitrogen pressure one month after installation and then every six months to ensure the system’s dampening performance remains optimal.