Pressure accumulators are used as pressure compensation vessels and balance temperature-related changes in volume and pressure peaks in hydraulic systems. Acting as a buffer accumulator, they also absorb the energy caused by pressure changes and release it later when necessary. They are also used to safely compensate for leaks , dampen pulsations and absorb shocks in systems and machines.
The HANSA-FLEX range includes numerous diaphragm and bladder accumulators in various designs. We can also supply you with other accumulated types, such as piston accumulators or individually manufactured special accumulators on request.
Bladder accumulators consist of a high-strength pressure vessel and a sealed bladder, which can be filled with gas. These accumulators are notable for their high speed of reaction and rapid return of fluid to the system.
Diaphragm accumulators consist of a spherical pressure vessel and are robust against external forces. Diaphragm accumulators are used for applications with smaller volumes of oil.
The HANSA-FLEX online shop has numerous products, such as adapters, nuts and repair kits, for the mounting and safe operation of your pressure accumulator.
All pressure accumulators are manufactured by renowned European companies.
Pressure accumulators meet with the requirements of the European Pressure Equipment Directive (PED).
Supplied with the appropriate European or international approval certificates.
All pressure accumulators are delivered ready to install from stock. On request, we can install your accumulator and fill it with nitrogen on site.
Pressure accumulators use the compressibility of nitrogen to absorb and store energy. An expanding elastomeric diaphragm or bladder divides the vessel into separate volumes for gas and oil. The gas side of the hydraulic accumulator is pressurised with gas at the required pressure before the system starts operation. If the fluid side of the system become subject to increasing pressure, the pressures in the two sides are equalised by the movement of the separating component and compression of the gas. The result is equilibrium between the gas and fluid pressure, and fluid is admitted into the accumulator. As soon as the hydraulic pressure drops, the compressed gas expands and pushes the fluid back into the hydraulic circuit.
In cooperation with the International Hydraulics Academy (IHA), HANSA-FLEX runs seminars for installation engineers and pressure accumulator maintenance personnel. Experts pass on their specialist knowledge of the safe operation, proper filling and repair of pressure accumulators.
