Sany Original Diaphragm Accumulator AD-0.35L-70BAR-NBR, Sany Material Code: 60265303, suitable for multiple machine models.

Sany Original Diaphragm Accumulator (AD-0.35L-70BAR-NBR | Material Code: 60265303)
The AD series welded diaphragm accumulator is an original part for Sany excavators/pump trucks hydraulic systems. It is used for energy storage and pressure maintenance, shock absorption, and pulsation suppression. It is pre-charged with nitrogen at the factory and features a sealed, maintenance-free design.
Core Parameters
- Model: AD-0.35L-70BAR-NBR
- Sany Material Number: 60265303
- Structural Type: Diaphragm Type (Welded Sealing, Non-rechargeable)
- Nominal Volume: 0.35L
- Maximum Working Pressure: 70bar (7MPa)
- Pre-charged Nitrogen Pressure: Approximately 35bar (3.5MPa) (Factory preset)
- Diaphragm Material: NBR (Nitrile Butadiene Rubber), oil-resistant, suitable for -20℃~+80℃
- Housing Material: Carbon Steel, with rust-proof surface treatment
- Interface Specification: Standard Thread (Compatible with Sany mounting brackets)
- Protection Rating: IP65, waterproof and dustproof for engineering machinery
- Weight/Dimensions: Compact and lightweight design
Model Interpretation
- AD: Diaphragm accumulator series (Welded sealing type)
- 0.35L: Effective volume of 0.35 liters
- 70BAR: Maximum working pressure of 70 bar (7 megapascals)
- NBR: Diaphragm material is nitrile butadiene rubber (Oil-resistant general-purpose type)
Applicable Machines and Locations
- Applicable to: Sany SY135/195/205/215/245/335/365 excavators, pump trucks/car-mounted pumps, and other hydraulic systems
- Installation: Pilot oil circuit, main pump control module, brake/rotary buffer circuit
- Functions:
- Maintain pilot pressure shortly after engine shutdown for convenient maintenance operations
- Absorb pressure shocks for smoother operation
- Suppress pump pulsations to protect hydraulic components
- Emergency oil supply to enhance system response
Key Features and Replacement Notes
1. Sealed and Maintenance-Free: Pre-charged with nitrogen at the factory and welded sealed, non-rechargeable. Long service life with no risk of leakage.
2. Non-interchangeable: Different structural design from bladder or piston accumulators; cannot be directly replaced.
3. Common Faults:
- Accumulator failure: Rapid pressure drop, weak operation, jammed movements
- Leakage: Oil seepage from housing or interfaces, requiring complete replacement
4. Installation Notes:
- Keep interfaces clean to prevent contaminants from entering
- Installation direction is arbitrary; recommended with oil port facing downward
- Ensure proper tightening torque to prevent loosening and leakage