Piston accumulators use pistons as separating elements. They can handle much higher gas compression ratios (up to 10:1) and flow rates as high as 215 litres (57 gallons) per second. Therefore the maximum pressure of the hydraulic fluid stored in a piston accumulator and the velocity with which the hydraulic fluid is released to the hydraulic system can be much higher. However, the piston inside the accumulator causes internal friction that negatively affects reaction speed.
Compared with hydraulic accumulators that use a different separating element (i.e. bladder or diaphragm), piston accumulators require a higher level of fluid cleanliness. Piston accumulators are used in applications that demand very large fluid storage requirements of up to 2,500 litres in a single hydraulic accumulator at very high pressures (up to 1,000 bar). The flow rate of piston accumulators is second to none so even at smaller fluid storage requirements and lower pressures, you may find the piston accumulator the best available type of hydraulic accumulator.
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.