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Diaphragm Accumulator/

SBO210-0.75E1/343U-140AB Type SBO Diaphragm Accumulators

Diameter 4.76 in121.0 mm
Height 6.68 in170 mm
Dimension Q 25 gpm
Dimension A 4.88 in124.0 mm
Hex Size 1.42 in36 mm

  • Product Detail

Diaphragm accumulators are a cost effective option for numerous functions involving energy storage, shock absorption or pulsation dampening in a hydraulic or fluid system. They are well suited for applications where smaller fluid volumes and flow rates are adequate and that require or involve:

  • Compact design
  • Low weight
  • Flexible mounting positions
  • Extremely quick shock response
  • Low cost
  • Low lubricity fluids, like water


TypeDiaphragm Accumulator
Model Code DescriptionSBO210-0.75E1/343U-140AB
Fluid Port ConnectionMale / Female Combination Connection
Weight2.8 kg6.2 lb
Size (L)0.75
MaterialStainless Steel
SeriesSBO 210
Manufacturing ProcessWelded
Connection SizeG1/2 BSPP Female Plus M33x1.5 DIN 13 Male
Country of InstallationPED/CE
Diaphragm CompoundECO (Hydrin)
Shell Construction and Gas Port DesignWelded Construction, rechargeable, ZP Gas Valve Version 1 (M 28 x 1.5)
ShellStainless steel (please note: MAWP decreases for most stainless models)
Fluid PortStainless steel
Thread (British Standard Pipe Parallel (BSPP) – Female)G1/2
Thread (DIN 13 – Male)M33 x 1.5
Flow25 gpm95 L/min
Maximum Pressure Ratio (p2:p0)8:1
Volume Capacity0.198 gal0.750 L
MAWP3000 psi210 bar
MAWP Values for Stainless Steel Models2000 psi140 bar
Effective Gas Volume45 in³


Diameter4.76 in121.0 mm
Height6.68 in170 mm
Dimension Q25 gpm
Dimension A4.88 in124.0 mm
Hex Size1.42 in36 mm


Both types of diaphragm accumulators have the same basic construction. The difference is in the shell. The welded version has a shell that is electron-beam welded, and therefore cannot be repaired. The threaded type has a shell made up of two halves (top and bottom) which are held together by a threaded locking ring.

Corrosion Protection

For use with certain aggressive or corrosive fluids, or in a corrosive environment, ZP offers protective coatings and corrosive resistant materials (i.e. stainless steel) for the parts that interface with the fluid or are exposed to the hostile environment.

Mounting Position

Diaphragm accumulators are designed to mount in any position. In systems where contamination is a problem, we recommend a vertical mount with the fluid port oriented downward.

System Mounting

ZP diaphragm accumulators are designed to be screwed directly onto the system. We also recommend the use of our mounting components, to minimize the risk of failure due to system vibrations.


Some common applications of diaphragm accumulators are:Agricultural Machinery & EquipmentForestry EquipmentMachine ToolsMining Machinery & EquipmentMobile & Construction EquipmentOff-Road Equipment

Diaphragm Materials

Not all fluids are compatible with every elastomer at all temperatures, therefore, ZP offers the following materials:NBR (Standard Nitrile)LT-NBR (Low Temperature Nitrile)ECO 30 (Epichlorohydrin)IIR (Butyl)FP

Additional Information

Diaphragm Accumulators have been successfully applied in both industrial and mobile applications for energy storage, maintaining pressure, leakage compensation, and vehicle hydraulic systems.

ZP manufactures two types of diaphragm accumulators:Non-repairable (welded)Repairable (threaded)

If you work with gas cylinder or information about our company. You can communicate with us on the website. Our official website is Our cost-effective products are very popular.



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