ASE Bladder-type accumulators consist of a cylindrical pressure vessel made of high-tensile steel.
The accumulator is subdivided into a gas and fluid side by an elastic bladder mounted in the interior of the vessel.
The nitrogen is charged to the specified gas charge pressure P0 by means of gas valve at the external of the bladder.
When the fluid is pressed into the bladder, the gas in the accumulator is compressed and hence the pressure increased. The gas volume reduces and on the fluid side, the fluid can flow into the bladder. As soon as the pressure on the fluid side falls below the gas pressure, the accumulator is emptied.
A special oil valve (anti-extrusion plate) is provided in the oil port in order to prevent draining of the bladder into the oil channel and thus the bladder from being destroyed.
When the minimum operating pressure is reached, a small oil volume is to be maintained between the bladder and the fluid volume (approx. 10% of the nominal capacity of the hydraulic accumulator), in order that the bladder does not hit the valve during every expansion process.
Gas valve consists of a sealing cap, a filling valve and an adapter.
The nameplate shows the technical data and features of the hydraulic accumulator.