SBO Series Diaphragm Accumulator | SBO1-210 SBO0.5-160 SBO2.5-315 | High Pressure

The SBO Series diaphragm accumulators from Chengyuan Hydraulic are high-precision pressure vessel components fully compatible with global industrial standards. By leveraging the compressibility of nitrogen gas, these units store hydraulic energy to backup power, absorb shocks, and compensate for system leakage. The SBO range (including SBO0.5, SBO1, SBO2.5) features a high-strength carbon steel shell and a flexible diaphragm for rapid response. Every accumulator undergoes 100% pressure integrity and leakage simulation testing to ensure safety under extreme high-pressure conditions, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Core Model Codes: SBO0.5-160, SBO1-210, SBO2.5-315

• Nominal Volume: 0.5 Liters, 1.0 Liters, 2.5 Liters

• Max Operating Pressure: 160 bar, 210 bar, 315 bar (depending on class)

• Housing Material: High-strength forged carbon steel (Tensile strength $\ge$ 540 MPa)

• Diaphragm/Seal Material: NBR (Standard) / FKM (High-temperature & chemical resistant)

• Fluid Port Connection: G1/4, G3/8, G1/2, or SAE6

• Gas Port Specification: Standard M28x1.5

• Operating Temperature: -20°C to +80°C (NBR) / -10°C to +150°C (FKM)

Key Technical Advantages:

• Seamless Forged Housing: The SBO shells are manufactured via a precision integral forging process, eliminating weld weak points. This ensures superior pressure ratings and removes the risk of fatigue cracking, extending service life even at 315 bar cyclic loading.

• High-Flexibility Diaphragm: Utilizing imported high-performance rubber with extremely low gas permeability. The optimized geometry ensures uniform stress distribution during charge/discharge cycles, preventing localized tearing and ensuring long-term pre-charge retention.

• Ultra-Fast Dynamic Response: Due to the negligible mass and inertia of the diaphragm, the SBO series excels at absorbing high-frequency pressure ripples (such as pump pulsations) far better than piston-type accumulators, protecting sensitive proportional valves and sensors.

• Multi-Fluid Compatibility: Available in various material configurations (e.g., Code B for specific construction), and when paired with FKM seals, the units withstand synthetic fluids and harsh chemicals across industrial and mobile environments.

Application Areas:

• Industrial Machinery: Emergency power backup for CNC machines and pressure holding for plastic machinery.

• Mobile Equipment: Pilot circuit energy storage for excavators and suspension damping for agricultural machinery.

• Energy Sector: Pitch control systems for wind turbines and hydraulic braking units.

Expert Maintenance Tips:

• Nitrogen Pre-charge Control: The nitrogen pre-charge pressure ($P_0$) should typically be set to 90% of the minimum system operating pressure. NEVER use oxygen or compressed air; use nitrogen with purity $\ge$ 99.9%.

• Mounting Orientation: For optimal discharge and diaphragm longevity, vertical installation (fluid port facing down) is highly recommended to minimize debris accumulation on the diaphragm.

• Integrity Inspections: It is recommended to perform a gas pressure check every 12 months. If the pre-charge has dropped by more than 10%, inspect the gas valve seal or diaphragm condition.