BS ISO 3529‑2:2020 pdf download.Vacuum technology — Vocabulary.
1 Scope
This document gives definitions of vacuum pumps and related terms. It is a continuation of ISO 3529-1
which defines general terms used in vacuum technology.
2 Normative references
ISO 3529-1:2019. Vacuum technology — Vocabulary — Part 1: General terms
ISO 2136O-1:2O12 Vacuum technology — Standard methods for measuring vacuum-pump performance — Part I: General description
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:/Jwww.iso.orgJobp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 Vacuum pumps
3.1.1
vacuum pump
device for creating, improving and/or maintaining a vacuum
Note ito entry: Two basically distinct categories may be considcred:gas transfer pumps (11.2) and gas gathering vacuum pumps (3.1.32)
Note 2 to entry: Some definitions given in ISO 3329-1 are repeated in this document in deferent terms to adapt to vacuum pumps,
Note 3 to entry: Vacuum is defined in ISO 3529-1.
Note 4 to entry: A classification table for vacuum pumps is described in AnnexA.
3.1.2
gas transfer vacuum pumps
vacuum pump (lid) that transports gas molecules from the inlet to the outlet (123) of the vacuum pump by means of positive displacement or transfer of kinetic momentum
3.1.9
liquid ring vacuum pump
rotary positive displacement vacuum pump (3.13) in which an eccentric rotor with fixed blades throws a liquid against the stator wall
Note I to entry: The liquid takes the form of a ring concentric to the stator and combines with the rotor blades to define a varying volume.
3.1.10
external vane vacuum pump
rotary positive displacement vacuum pump (113) in which a rotor is turning eccentrically, in contact with the internal wall of the stator
Note 1 to entry: A device moving relative to the stator is pressed against the rotor and divides the stator chamber into parts of varying volume (external vane pump).
3.1.11
rotary piston vacuum pump
rotary positive displacement vacuum pump (113) in which a rotor is turning eccentrically to the internal wall of the stator
Note 1 to entry: The stator chamber is divided into two parts of varying volume by a bulkhead (piston or plunger) sealed in the stator (piston bearing) and rigidly fixed to the rotor.
Note 2 to entry: Rotary piston vacuum pump also called rotary plunger vacuum pump.
3.1.12
trochoid vacuum pump
rotary positive displacement vacuum pump (1L3) in which an elliptical piston moves around a shaft eccentrically
Note 1 to entry: The case is in continuous non-contact sealing with the piston. Oil is fed for sealing.
3.1.13
peristaltic vacuum pump
rotary positive displacement vacuum pump (113) in which a turning rotor compresses with a number of rollers or lobes a flexible tube arid forcing the gas move through the tube
3.1.14
roots vacuum pump
rotary positive di5pluement vacuum pump 3J..3) in which two or three lobed rotors, interlocked and synchronized, rotate in opposite directions moving past each other and the housing wall with a small clearance and without touching
Note 1 to entry: Roots vacuum pumps are used as primary — also referred to as mechanical booster vacuum pump — as well as secondary or main vacuum pump.
Note 2 to entry: Roots pumps have per stage no inner compression ratio.BS ISO 3529‑2 pdf download.