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A piston accumulator is a device used specifically for storage of liquid under pressure. As liquids, for all practical purposes, are incompressible, this objective is achieved by utilizing the compressibility of gases. A floating piston is fitted into the accumulator tube. An inert gas – nitrogen- is filled into the gas side through a pressure valve to a pressure P . The piston moves to the 0 bottom end, filling the entire volume V of the accumulator. 0 When the system pressure P is higher than the gas 1 precharge pressure P , the liquid enters the accumulator 0 and the piston is moved towards the gas side compressing and reducing the gas volume to V .1 Should the liquid pressure rise to P , the volume of gas 2 reduces to V with an attendant rise in pressure, thus 2 balancing the Liquid pressure. A potential energy is now stored in the accumulator to be utilized whenever needed.
Design : Floating Piston
Max. Pressure (PS) : 220 ~ 800 Bar.
Test Pressure (PT) : 1.43 x PS
Temperature range : -20°C to +80°C (Standard)
Allowable pre.ratio (P2/P0) : 8:1
Nominal capacity : 0.25 to 1500 Ltrs.
Fluid Viscosity range : 10 to 400 cSt
Recommended viscosity : 32 cSt
Fluid contamination degree: Class 20/18/13 according to ISO 4406:1999 or better on request.
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