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Diaphragm Accumulator/

SBO210-0.16E1/665S-210CK Type SBO Diaphragm Accumulators

Diameter 2.91 in74 mm
Height 4.95 in126 mm
Dimension Q 10 gpm
Dimension A 3.15 in80 mm
Hex Size 1.18 in30 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 DescriptionSBO210-0.16E1/665S-210CK
Fluid Port ConnectionStandard SAE Connection
Weight0.8 kg1.8 lb
Size (L)0.16
MaterialLow Temp Carbon Steel
SeriesSBO 210
Manufacturing ProcessWelded
Connection Size9/16-18 UNF Female
Country of InstallationUSA/ASME
Diaphragm CompoundLT-NBR (Low Temperature Buna)
Compound Operating Temperature Range (Mineral Oils)-50 to 180 ºF
Shell Construction and Gas Port DesignWelded Construction, rechargeable, ZP Gas Valve Version 1 (M 28 x 1.5)
ShellLow temperature carbon steel (≤ -20 ºF)
Fluid PortLow temperature carbon steel (≤ -20 ºF)
Thread (Society of Automotive Engineers (SAE) – Female)9/16-18 UNF
Flow10 gpm38 L/min
Volume Capacity0.042 gal0.160 L
MAWP3000 psi210 bar
Effective Gas Volume10 in³


Diameter2.91 in74 mm
Height4.95 in126 mm
Dimension Q10 gpm
Dimension A3.15 in80 mm
Hex Size1.18 in30 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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