SB330 Series Hydraulic Bladder Accumulator | SB330-20A1 SB330-32A1 SB330-50A1 | High Pressure Storage

The SB330 Series hydraulic bladder accumulators by Chengyuan Hydraulic are high-performance pressure vessels designed for energy storage, pulsation dampening, and emergency power in sophisticated hydraulic circuits. This series is engineered for 100% original-place interchangeability with global industry standards, specifically the HYDAC SB330-20A1, SB330-32A1, and SB330-50A1 models. Built with a high-tensile forged steel shell and premium elastomer bladders, our SB330 series excels in rapid response and long-term durability. Every unit undergoes 100% simulated condition pressure testing to guarantee unmatched safety and performance for your mission-critical systems.

Technical Specifications (Bulleted List)

• Model Series: SB330 (High-Pressure Standard)

• Specific Codes: SB330-20A1/112A9, SB330-32A1/112A9, SB330-50A1/112A9

• Nominal Volume: $20\text{ L, } 32\text{ L, } 50\text{ L}$

• Rated Working Pressure: $33\text{ MPa (4786 psi / 330 bar)}$

• Proof Test Pressure: $1.5 \times \text{Working Pressure}$

• Shell Material: High-strength seamless forged carbon steel

• Bladder Material: NBR (Standard), IIR, or Low-temp options

• Temperature Range: $-10\text{°C}$ to $+80\text{°C}$

• Gas Port Connection: $7/8-14\text{UNF}$ or $M28 \times 1.5$

• Fluid Connection: BSP Threaded or SAE Flange options

Key Technical Advantages

• Seamless Forged Shell Technology: The shell is produced via hot-spinning of seamless tubes, eliminating weld seams and potential stress fracture points. Both internal and external surfaces are treated for corrosion resistance, ensuring zero contamination of the fluid media.

• High-Flexibility, Low-Permeability Bladder: Our bladders are manufactured from specialized rubber compounds that minimize gas diffusion and resist mechanical fatigue. They respond instantly to pressure fluctuations, making them ideal for high-frequency damping applications.

• High-Flow Oil Valve Design: Features an integrated “mushroom” poppet valve at the fluid port to prevent bladder extrusion during high-velocity discharge. This design ensures maximum flow capacity with minimal pressure loss.

• 100% Safety & Performance Testing: Safety is non-negotiable for pressure vessels. Chengyuan performs exhaustive hydrostatic and pneumatic leakage tests on every SB330 unit, ensuring full compliance with international safety factors.

Application Areas

• Industrial Presses: Used as an auxiliary energy source for forging and stamping presses to reduce motor size requirements.

• Hydraulic Power Units (HPU): Dampens pressure ripples from pumps to reduce noise and protect sensitive control valves.

• Mobile Machinery: Provides emergency steering and braking power for heavy construction vehicles in case of pump failure.

Expert Maintenance Tips

• Nitrogen Only: Never use Oxygen or Compressed Air to charge the accumulator! Use high-purity Nitrogen ($\ge 99.8\%$) to prevent explosion risks and oxidation.

• Pre-charge Pressure ($P_0$): $P_0$ should typically be $90\%$ of the minimum system working pressure. Periodically check $P_0$ every 3-6 months to maintain peak performance and prevent bladder damage.

• Orientation: For optimal performance and debris management, vertical mounting with the oil port pointing downward is highly recommended.