SBO Series

HYDAC Diaphragm Accumulator SBO Series uses nitrogen as a compressible medium to store gases and fluids.

When fitted with a HYDAC Safety and Shut-off Block, HYDAC diaphragm accumulators comply with the regulations of the Pressure Equipment Directive PED 97/23/EC and the German regulations on health & safety at work.

Function

Fluids are practically incompressible and cannot therefore store pressure energy. The compressibility of a gas is utilised in hydraulic accumulators for storing fluids. HYDAC diaphragm accumulators are based on this principle, using nitrogen as the compressible medium.

A diaphragm accumulator consists of a fluid section and a gas section with the diaphragm acting as the gas-proof screen.

The fluid section is connected to the hydraulic circuit so that the diaphragm accumulator draws in fluid when the pressure increases and the gas is compressed. When the pressure drops, the compressed gas expands and forces the stored fluid into the circuit.

At the base of the diaphragm is a valve poppet. This shuts off the hydraulic outlet when the accumulator is completely empty and thus prevents damage to the diaphragm.

Speak to our hydraulics division about your factory automation

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