HYDAC SB330 Series Bladder Accumulator | SB330-32A1 SB330-50A1 | High Pressure Hydraulic Accumulator

Chengyuan Hydraulic presents the SB330 Series high-pressure bladder accumulators, precision-engineered as premium replacements for HYDAC industrial standards. This range covers capacities from 4L up to 50L, featuring core models such as SB330-32A1/112A9-330A and SB330-50A1/112A9-330A.

As the “energy buffer” of hydraulic systems, Chengyuan ensures 100% Drop-in Interchangeability regarding mounting dimensions, oil port specifications (e.g., G 2″), and gas valve configurations. Utilizing high-strength seamless forged steel shells and high-performance elastomeric bladders, coupled with our 100% Simulation Load Pressure Testing, we guarantee exceptional instantaneous response and gas-tightness at 330 bar. These units are the ideal choice for energy saving, shock absorption, and emergency power backup.

Technical Specifications 

• Series Category: SB330 (Standard High-Pressure Type)

• Nominal Volume: 4L / 6L / 10L / 20L / 32L / 50L

• Max Working Pressure: 330 bar (33 MPa)

• Shell Material: High-strength Carbon Steel (Seamless Forged)

• Bladder Material: NBR (Standard), Low-temp NBR, or FKM (Viton)

• Fluid Port Connection: A1 Male Thread (Typically G 2″ or size-dependent)

• Gas Valve Interface: 7/8-14UNF (Standard A9 Interface)

• Operating Temperature: -10°C to +80°C (Standard Configuration)

• Compatible Media: Hydraulic oil, Lubricating oil, Non-flammable fluids

Key Technical Advantages:

• Seamless Integrated Forged Shell: The accumulator shell is forged from high-quality alloy steel using a spinning process, eliminating welding defects. The internal wall is precision-polished to minimize friction between the bladder and the shell, significantly extending bladder life.

• High-Flexibility Low-Permeability Bladder: The specialized NBR formulation provides superior elastic deformation and extremely low gas permeability. This ensures consistent dynamic response even during high-frequency charge/discharge cycles.

• High-Flow Poppet Valve Design: The oil port is equipped with a high-strength stainless steel poppet valve to prevent the bladder from being extruded into the port during discharge. The large-bore design ensures minimal pressure loss during high-flow energy release.

• Superior Safety Standards: Strictly compliant with PED 97/23/EC pressure vessel standards. The design burst pressure far exceeds the rated working pressure, and every unit undergoes a hydrostatic strength test at 1.5x the working pressure before shipment.

Application Areas:

• Energy Storage: Auxiliary power source for machine tools and die-casting machines to reduce installed motor power.

• Pulsation Dampening: Installed at pump outlets to absorb high-frequency pressure pulsations and reduce system noise.

• Emergency Braking: Critical for wind turbines and cranes to ensure safe reset in case of power failure.

• Thermal Expansion Compensation: Absorbing volume expansion pressures in long-distance pipelines due to temperature fluctuations.

Expert Maintenance Tips:

• Pre-charge Nitrogen Check: Never use oxygen or compressed air (explosion risk). Always use Nitrogen with purity ≥ 99.9%. The recommended pre-charge pressure $P_0$ is 0.9 times the minimum system operating pressure.

• Periodic Inspection: Check the nitrogen pressure weekly during the first month of operation, then every six months once stabilized.

• Mounting Position: Vertical installation (fluid port down) is highly recommended. Use dedicated accumulator brackets and clamps for fastening; never weld directly onto the accumulator shell.