Hydac SBO210 Series Accumulator | SBO210-2E1 SBO210-0.75E1 | Diaphragm Accumulator

The SBO210 Series diaphragm hydraulic accumulators by Chengyuan Hydraulic are precision pressure control components fully compatible with Hydac industrial standards. This range features core models such as SBO210-2E1/112A9-210AK, SBO210-1, and SBO210-0.75E1. These accumulators utilize a high-strength welded shell and a flexible diaphragm to separate nitrogen gas from hydraulic fluid. Due to the extremely low mass of the diaphragm, the SBO210 offers superior dynamic response times compared to bladder-type accumulators. As a high-fidelity replacement, all Chengyuan units provide 100% original-place interchangeability and undergo 100% gas-tightness and fatigue testing to ensure absolute safety at a 210 bar rated pressure.

Technical Specifications :

• Core Models: SBO210-0.75, SBO210-1, SBO210-2, SBO210-3.5

• Effective Volume: $0.075\text{ L}$ to $4\text{ L}$ (Popular sizes: $0.75\text{ L}, 1\text{ L}, 2\text{ L}$)

• Max Operating Pressure: $21\text{ MPa (210 bar / 3000 psi)}$

• Shell Material: High-tensile carbon steel (Stainless steel optional)

• Diaphragm Material: NBR (Standard), ECO (Low-temp resistant)

• Fluid Port: A9 (Standard $G 1/2$ or $M 18 \times 1.5$ threads)

• Pre-charge Pressure ($P_{0}$): Factory preset based on client requirements

• Temperature Range: $-10\text{°C}$ to $+80\text{°C}$ (for standard NBR)

Key Technical Advantages:

• Ultra-Fast Dynamic Response: With a diaphragm of minimal mass and inertia, the SBO210 reacts instantaneously to high-frequency pressure fluctuations. This makes it far more effective than piston or bladder accumulators in dampening pump noise and hydraulic “water hammer” effects.

• Compact & Lightweight Design: Manufactured using advanced welding or spinning processes, the shell maintains uniform wall thickness and a compact footprint. This makes it the ideal choice for mobile machinery like excavators and tractors where installation space is strictly limited.

• Low-Permeability Diaphragm Technology: Built with high-density synthetic rubber, our diaphragms exhibit an extremely low gas permeability coefficient. The optimized clamping structure ensures nitrogen pressure remains stable over millions of cycles, significantly extending maintenance intervals.

• Fail-Safe Pressure Vessel Design: Engineered to meet PED standards, the shell is designed with predictable rupture characteristics under abnormal overpressure or fire conditions, preventing the formation of destructive fragments.

Application Areas:

• Mobile Machinery: Tractor suspension damping, excavator pilot circuit storage, and loader smooth-ride control.

• Hydraulic Braking: Emergency energy reserve for forklift or specialized vehicle braking systems.

• Pressure Compensation: Clamping pressure maintenance for machine tools and thermal expansion compensation in long pipelines.

Expert Maintenance Tips:

• Pre-charge Optimization: For energy storage, set $P_{0}$ to $90\%$ of the minimum system pressure. For shock absorption, set it to $60\text{–}90\%$ of the average working pressure.

• Installation Orientation: Although the SBO210 can be mounted in any position, it is recommended to install it with the fluid port facing downward to facilitate air removal from the system.

• Gas Valve Protection: The pre-charge valve (standard M28 or similar) includes a protective cap. Ensure it is tightened after charging. NEVER use gases other than nitrogen.