Low pressure membrane accumulator type ELM

The hydraulic accumulators of the ELM series are accumulators of simple construction for secondary applications. Available in different volumes and maximum working pressures allow various possibilities of use and application. They consist of a welded steel body and a nitrogen loading screw. The inner membrane has a lower vulcanized metal plate for holding. Their simple construction does not allow the replacement of the membrane and therefore can not be repaired. The ELM series accumulators are supplied already to the pre-charge of nitrogen before shipment or can be preloaded by the customer through the VGU series verifier / inflator.

The accumulators are supplied:

During installation it is important to leave a space of approx. 200 mm free above the nitrogen loading valve to check the precharge through VGU. It is advisable to check the nitrogen precharge with every 6 months (VGU). The control must be done with the machine or plant stopped and at room temperature. In the case in which the value of the preload has dropped below 10% of the initial value, it is necessary to intervene to restore it. If the preload is close to zero or zero, the internal membrane is very likely to be damaged or broken. in these case therefore can not be repaired and must to be replaced with a new one. In order to easily replace the accumulator it is advisable to provide for the possibility of isolating the accumulator from the hydraulic circuit by means of special systems and valves such as the DI series safety blocks.