Hydraulic Accumulators

Bladder Accumulators

The accumulator comprises a forged or welded steel shell, a rubber bladder and anti-extrusion system. Pressure: Maximum working pressure: (PS) = 40 bar. Operating pressure (OP): 14 to 80 bar. Volume: from 0.5 to 575 Litres Shell Material: Options include; alloyed steel, stainless steel, aluminium, titanium and composites. Bladder Materials: Various bladder materials available which are compatible with a wide range of fluids and temperatures. Anti-extrusion System: perforated bushing. Approvals: PED 2014/68/EU, ATEX, ASME VIII div 1, SELO, CUTR, DNV, BUREAU VERITAS MARINE, ABS, Germanischer Lloyd’s. Specials: – For special constructions please consult Parker. Maximum pressure differential (P2/P0): 4:1 Nitrogen gas pressure : Never precharge accumulators at a pressure exceeding 20 bar at maximum working temperature with nitrogen purity > 99,8% N2 class 2.8.

Diaphragm Type Accumulator

Operation of the Olaer gas loaded diaphragm accumulator is based on the considerable difference in compressibility between a gas and a liquid, enabling a large quantity of energy to be stored in an extremely compact form. This enables a liquid under pressure to be accumulated, stored and recovered at any time. The adaptation of a hydraulic shock absorber made up of a diaphragm accumulator improves driver comfort and offers immediate response times when driving over obstacles and the same flexibility for variable operating conditions. 0 < speed < 50 kph 3.5 < load variation < 100% Identical flexibility depending on your use. The same EC pressure directive (PED) compliant accumulator can be used in over 35 destination countries, thus facilitating their free movement. The technical characteristics are as follows: Minimum/maximum temperature allowable (° Celsius) : -20/+80 for standard nitrile elastomers for models between 0.5≤V≤1.4 Litre -10/+80 for standard nitrile elastomers for models ≥2 Litre and ≤0.32Litre – 35/+80 for hydrin elastomers

Piston Accumulators

Operation of the Parker Olaer gas loaded piston accumulator is based on the considerable difference in compressibility between a gas and a liquid, enabling a large quantity of energy to be stored in an extremely compact form. This enables a liquid under pressure to be accumulated, stored and recovered at any time. When fluid under pressure enters the fluid side of the accumulator, the piston is pushed towards the gas side and the Nitrogen gas is compressed. Parker Olaer piston accumulators can be supplied with a large variety of seals suitable for high and low pressures and temperatures as well as special fluids. This is part of the flexibility of the Piston Accumulator, materials in all components can be chosen to best fit the application.