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Piston Accumulator/

SK 350 Series 2557.8 mm Height Piston Accumulator

180 mm
100.7 in2557.8 mm

  • Product Detail

The piston accumulator series SK350 is ZP’s most versatile series with a repairable design and large selection of options. The largest range of possible sizes, material construction, and other options are offered. Standard and Low Friction piston designs are available for superior performance and flow rates. Features of this series are: Bore Diameters from 2.4″ ID to 19.3″ ID, Sizes from 1 quart to 200 gallons, Largest range of possible sizes and material options, Standard and Low Friction piston designs available, Largest variety of gas and fluid port options, A variety of piston position sensor monitoring systems are available, ASME, CRN, PED/CE and other pressure code certifications are available.


Industry Standards/CertificationsASME
TypeRepairable Piston Accumulator
Connection TypeFlange
Seal MaterialNBR/PUR (-22 to 180F)
MediumPUR resistant to: Mineral Oils (HL and HLP), Non-flammable fluids from the HFA group, PUR not resistant to: Water and water-gylcol mixtures, Alkalis, Acids
MaterialCarbon Steel
Short DescriptionPiston Accumulators Series SK350
Operating Temperature [Min]-30 ºC-22 ºF
Operating Temperature [Max]80 ºC180 ºF
Connection Size2″ SAE Code 61
Operating Pressure [Min]0 bar0 psi
Operating Pressure [Max]210 bar3000 psi
Connection GenderFlange
Volume Capacity13.2 gal57 L
Pre-Charged Pressure0 bar0 psi
Valve MaterialCarbon Steel
Model Code DescriptionSK350-57/3218S-210FCF-KCH-18H


Diameter180 mm
Height100.7 in2557.8 mm


ApplicationFluids are practically incompressible and cannot therefore store pressure energy. The compressibility of a gas (nitrogen) is utilized in hydraulic accumulators for storing fluids. ZP piston accumulators are based on this principle. A piston accumulator consists of a fluid section and a gas section with the piston acting as a gas-proof separation element. The gas section is pre-charged with nitrogen. The fluid section is connected to the hydraulic circuit so that the piston accumulator draws in fluid when the pressure increases and the gas is compressed. When the pressure drops, the compressed gas expands and forces the stored fluid into the circuit.

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