ISO 5596:1999 pdf download – Hydraulic fluid power -Gas-loaded accumulators with separator — Ranges of pressures and volumes and characteristic quantities.
2 Normative references
The following normative documents contain provisions wtiich, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, arty of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to invest gate the possibdity of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards
ISO 3, Plelerred numbers — Series of preteed numbers.
ISO 5598, FhJk power systems and components — Vocabulary.
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 5598 and the following apply.
gas-loaded accumulator
accumulator with separation in which the liquid is pressurized using the compressibility of an inert gas (nitrogen, for example)
NOTE The separation is achieved by means of a hiadder, diaphragm, piston. etc
gas-loaded accumulator, transfer type
gas-loaded accumulator with a port for additional gas capacity from one or more gas bottle(s)
compatible fluid
fluid that has no significant effect on the nature or life of the parts of the accumulator, especially those made of elastomeric materials
4.1 Energy storage
The gas-loaded accumulator stores hydraulic fluid under pressure dunng a period of low energy demand from the circuit in which it is mounted, The stored hydraulic fluid is then returned to the circuit to supplement or replace the pump discharge temporarily or to ensure emergency operation.
4.2 Pulse or surge damping
The gas-loaded accumulator absorbs hydraulic fluid to reduce pressure peaks and returns hydraLic fluid to compensate for pressure drops. The accumulator thus reduces the amplitude ol pressure oscillations in the circuit in which it is mounted.
4.3 Thermal compensation
The gas-loaded accumulator absorbs volume changes resulling from changes in the temperature of the hydraulic fluid contained in an isolated part of the circuit.
5 Characteristic quantities
The following quantities shall be used to define and design a gas-loaded accumulator.
Tenperatures shall be expressed in degrees Celsius.
6 Ranges of pressures and volumes
6.1 NomInal pressure range, P4
6,3(63) —10 (100)— 16(160) —20 (200)—25 (250) —31 .5 (315)—40 (400) — 50(500)—63 (630)
Pressures are expressed in megapascals, with me equivalent value in bars i parentheses.
For special applications that require lower or higher pressures. use pressures corresponding to me R 10 series 01
preferred numbers (see ISO 3).
6.2 NomInal volume range. V
0,25—0,4—0,5—0,63—1,0—1,6—2.5—4.0—6.3—10—16—20—25—32—40—50—63— 100—160—200
Volumes are expressed in litres.
For special applications that require smaler or larger volumes, use volumes correspordng to the R 10 series of preferred numbers see ISO 3).
7 Identification statement (reference to this International Standard)
Use the toilowing statement in test reports, catalogues, and sales literature when electing to comply with this International Standard:
Ranges of pressures and volumes, and characteristic quantities for gas-loaded accumulators with separator selected in accordance with ISO 5596:1999, Hydraulic fluid power — Gas-loaded accumulators with separator — Ranges of pressures and volumes and characteristic quanlites.