We stock the SBO Series hydraulic accumulator diaphragms by Hydac.
While fluids are practically incompressible, this does not apply to gases. Hydraulic accumulators use these basic laws of physics to store hydraulic energy. Nitrogen is normally used as the compressible medium.
The various types of hydraulic accumulator are categorised on the basis of the separation element that keeps the gas section separate from the fluid section in the pressure vessel. In the case of diaphragm accumulators, this is an elastomer diaphragm or a full-PTFE diaphragm. Set into the base of the diaphragm is a valve plate. This shuts off the hydraulic outlet when the accumulator is completely empty and thus prevents damage to the diaphragm.
The fluid side of the diaphragm accumulator is connected to the hydraulic circuit so that the diaphragm accumulator draws in fluid when the system pressure increases and the trapped gas is compressed. When the system pressure drops, the compressed gas expands and forces the stored fluid back out into the hydraulic circuit.
The SBO Series includes volume options from 0.075 to 4 litres, maximum pressure up to 300 bar.
