Diaphragm accumulators have a rubber plate or diaphragm as the separating element. This element is either welded or screwed together between two spherical shells (or compartments). The compartment above the diaphragm is filled with nitrogen. The compartment below is directly connected to the hydraulic circuit. Diaphragm accumulators are the smaller of all hydraulic accumulator types and available at fluid storage capacities of 0.075 to 4 litres.
Thus diaphragm accumulators are useful if the required fluid storage capacity is low (i.e. 4 litres or less). Diaphragm accumulators have most of the advantages of bladder-type units, but can handle gas compression ratios of up to 8:1. However, they are limited to smaller volumes, and their performance can sometimes be affected by gas permeating across the diaphragm. The small size and numerous mounting options makes it very useful for mobile applications.
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.