BS ISO 3529-2:2020 pdf download – Vacuum technology — Vocabulary Part 2: Vacuum pumps and related terms 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 21360‑1:2012, Vacuum technology — Standard methods for measuring vacuum-pump performance — Part 1: 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://www.iso.org/obp — 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 1 to entry: Two basically distinct categories may be considered: gas transfer pumps (3.1.2) and gas gathering vacuum pumps (3.1.32) Note 2 to entry: Some definitions given in ISO 3529‑1 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 Annex A. 3.1.2 gas transfer vacuum pumps vacuum pump (3.1.1) that transports gas molecules from the inlet to the outlet (3.2.3) 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 (3.1.3) in which an eccentric rotor with fixed blades throwsa liquid against the stator wall Note 1 to entry: The liquid takes the form of a ring concentric to the stator and combines with the rotor blades todefine a varying volume. 3.1.10 external vane vacuum pump rotary positive displacement vacuum pump (3.1.3) in which a rotor is turning eccentrically in contactwith 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 chamberinto parts of varying volume (external vane pump). 3.1.11 rotary piston vacuum pump rotary positive displacement vacuum pump(3.1.3) in which a rotor is turning eccentrically to the internalwall 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...
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