{"id":2852,"date":"2024-03-07T11:08:43","date_gmt":"2024-03-07T10:08:43","guid":{"rendered":"https:\/\/www.bf-hydraulik.com\/encyclopedia\/hydraulic-tank\/"},"modified":"2026-04-15T11:53:24","modified_gmt":"2026-04-15T09:53:24","slug":"hydraulic-tank","status":"publish","type":"encyclopedia","link":"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-tank\/","title":{"rendered":"Hydraulic tank"},"content":{"rendered":"\t\t
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Hydraulic tank: Reservoir for the pressure medium<\/h1>

The hydraulic tank<\/a> is the reservoir for the hydraulic fluid or the hydraulic medium of a hydraulic system<\/a>. As a rule, this is a special mineral oil. The hydraulic tank<\/a> only stores the oil, but otherwise keeps it pressureless. This is necessary to ensure that the tank can be filled or emptied safely at any time. <\/p>

Position and function of the hydraulic tank<\/h2>

The hydraulic tank<\/a> is a closed container connected to the surrounding air via vent valves. This connection is necessary so that pressure equalization can always take place in the tank. Returning oil would otherwise create overpressure, while outgoing oil would create negative pressure. Both could affect the pressure distribution in the hydraulic system<\/a>, which is why pressure equalization in the hydraulic tank<\/a> is very important. The tank is filled with oil through sealable openings. The oil flows from the tank first through a shut-off valve and immediately afterwards through a check valve<\/a>. Only then is the hydraulic oil placed under the required operating pressure. The oil flows through the system in a closed circuit until it arrives back at the tank. <\/p>

Extensions for large hydraulic tanks<\/h3>

Large hydraulic tank<\/a>s, such as those used in heavy construction machinery, have a number of extensions and attachments. The following applications are typical for these uses: <\/p>