1. Model Code Explanation
SB330-50A1/669U-330
SB330: Standard bladder accumulator series, max operating pressure 330 bar
50: Nominal volume 50 liters
A1: Standard American thread oil port with built-in check valve
669U: Charging valve code; “U” stands for standard charging valve (without explosion-proof / ATEX certification)
330: Rated working pressure 330 bar
2. Pressure Parameters
Nominal / Maximum Operating Pressure: 330 bar (33 MPa)
Housing Burst Pressure: Approx. 500 bar
Recommended Nitrogen Pre-charge Pressure: 0.6 ~ 0.85 × minimum system working pressure
Compatible Media: Standard mineral hydraulic oil
3. Volume & Flow Rate
Nominal Volume: 50 L
Effective Oil Discharge Volume: 32 ~ 38 L (depends on system pressure differential)
Max Permissible Flow Rate: 25 L/s (standard SB330-N flow design)
4. Standard Material Configuration
Accumulator Housing: Seamless low-temperature carbon steel with red anti-corrosion coating
Bladder: NBR nitrile rubber (compatible with mineral hydraulic oil)
Oil Port Valve Body: Carbon steel
Charging Valve: Model 669U standard threaded valve for nitrogen charging & discharging
5. Dimension Data (Unit: mm)
Outer Diameter of Cylinder: 229 mm
Overall Length (excluding external pipe fittings): 1931 mm
Bottom Oil Port Thread: G2 (2 inch pipe thread)
Top Charging Valve Thread: 7/8-14 UNF
SB330-50A1/669U-330, SB330-50A1/669U-330A Specifications
| SB330 | Standard bladder accumulator series, max operating pressure 330 bar |
|---|---|
| 50 | Nominal volume 50 liters |
| A1 | Standard American thread oil port with built-in check valve |
| 669U | Charging valve code; "U" stands for standard charging valve (without explosion-proof / ATEX certification) |
| 330 | Rated working pressure 330 bar |
| Nominal / Maximum Operating Pressure | 330 bar (33 MPa) |
| Housing Burst Pressure | Approx. 500 bar |
| Recommended Nitrogen Pre-charge Pressure | 0.6 ~ 0.85 × minimum system working pressure |
| Compatible Media | Standard mineral hydraulic oil |
| Nominal Volume | 50 L |
| Effective Oil Discharge Volume | 32 ~ 38 L (depends on system pressure differential) |
| Max Permissible Flow Rate | 25 L/s (standard SB330-N flow design) |
| Accumulator Housing | Seamless low-temperature carbon steel with red anti-corrosion coating |
| Bladder | NBR nitrile rubber (compatible with mineral hydraulic oil) |
| Oil Port Valve Body | Carbon steel |
| Charging Valve | Model 669U standard threaded valve for nitrogen charging & discharging |
| 5. Dimension Data (Unit | mm) |
| Outer Diameter of Cylinder | 229 mm |
| Bottom Oil Port Thread | G2 (2 inch pipe thread) |
| Top Charging Valve Thread | 7/8-14 UNF |
About the SB330-50A1/669U-330, SB330-50A1/669U-330A
The SB330-50A1/669U-330, SB330-50A1/669U-330A is a hydraulic & pneumatic products used in industrial automation, control and power systems. It is rated at SB330 Standard bladder accumulator series, max operating pressure 330 bar, 50 Nominal volume 50 liters, A1 Standard American thread oil port with built-in check valve. This hydraulic & pneumatic products is supplied as new, original industrial-grade stock. Each unit is identified by manufacturer part number SB330-50A1/669U-330, SB330-50A1/669U-330A for accurate procurement and cross-referencing.
Why source the SB330-50A1/669U-330, SB330-50A1/669U-330A from HDE123
- Verified part number: every SB330-50A1/669U-330, SB330-50A1/669U-330A is checked against its manufacturer specification before shipment.
- 20 confirmed technical parameters available on this page for engineering review.
- Global delivery with clear lead time and commercial invoice for B2B buyers.
- Fast B2B support: send us the equipment model or an existing part number and our engineers confirm compatibility before you order.
Ordering the SB330-50A1/669U-330, SB330-50A1/669U-330A
To order the SB330-50A1/669U-330, SB330-50A1/669U-330A, add it to your cart and complete checkout, or use the Request a Quote form for volume purchases and replacement / cross-reference enquiries. Lead time: typically 3–10 working days for in-stock items, subject to confirmation. Worldwide shipping is available and a commercial invoice is provided for customs.