ISO 21360-3:2019 PDF

Scope: This document specifies methods and special requirements for measuring the maximum tolerable pressure difference, effective compression ratio, compression ratio with zero throughput and overflow valve pressure difference of mechanical booster vacuum pumps. It applies to mechanical booster vacuum pumps employed for medium vacuum or rough vacuum applications including gas-cooled mechanical booster vacuum pump and multiple mechanical booster vacuum pump systems. It covers particular characteristics of mechanical boosters that are different from those of the usual positive displacement vacuum pumps. Maximum tolerable pressure difference Δpmax, effective compression ratio Keff, compression ratio with zero throughput K0 and overflow valve pressure difference Δp1 are special characteristics of the performance of mechanical booster vacuum pumps.

ISO 21360-3:2019 Referenced Document

ISO 21360-1:2012 Vacuum technology - Standard methods for measuring vacuum-pump performance - Part 1: General description
ISO 3529-1 Vacuum technology — Vocabulary — Part 1: General terms*， 2019-07-16 Update
ISO 3529-2 Vacuum technology — Vocabulary — Part 2: Vacuum pumps and related terms*， 2020-02-25 Update
ISO 3567 Vacuum gauges - Calibration by direct comparison with a reference gauge

2019 ISO 21360-3:2019 Vacuum technology — Standard methods for measuring vacuum pump performance — Part 3: Specific parameters for mechanical booster vacuum pumps