A bladder accumulator is the most commonly used hydro-pneumatic accumulator. The bladder is filled with nitrogen and fitted in a welded or forged steel pressure vessel. The bladder is made of an elastic material (elastomer), e.g. rubber. The gas pre-charge pressure can be adapted via the gas inlet/outlet valve on top of the bladder accumulator. If the bladder accumulator is mounted vertically or at an angle, the gas side must always be on top.
When the pressure drops, the compressed gas in the bladder expands and pushes the stored fluid into the hydraulic circuit. At zero pressure, the bladder may be pushed out of the pressure vessel. To prevent this, a spring-loaded valve is provided on the fluid side. Standard bladder accumulators are capable of operating at maximum pressures around 300 bar but specially designed bladder accumulators are capable of operating at maximum pressures of up to 1,000 bar.
DTA has extensive expertise with hydraulic accumulators and has direct access to stocking points of different types of hydraulic accumulators in various sizes and configurations. We supply genuine spare parts of all high quality hydraulic accumulator manufacturers. Depending on your requirements, DTA can supply high-quality hydraulic accumulators, taking into account a wide variety of functional and hydraulic system requirements.
We supply high quality brands hydraulic accumulators for various demanding applications. These include Parker Hannifin, Olaer, FCH, Greer, Hydac, QHP, Bosch Rexroth, and others on request. Our scope of supply covers the full range of different accumulator types (bladder, piston, diaphragm) and accumulator accessories, such as safety valve blocks and testing devices. We supply genuine spare parts for all the hydraulic manufacturers referred to above.
Applications that utilise large flows at high speeds may use accumulators for energy storage. When required, the accumulator pushes fluid into the hydraulic circuit to add to the pump flow. When the actuators in the hydraulic system are not in motion, the accumulator will refill. Accumulators can also operate as energy sources during normal operation of the system. Accumulators that are weight- or spring-loaded can also be used in industrial applications.