BS ISO 21360-4 Vacuum technology — Standard methods for measuring vacuum-pump performance - Part 4: Turbomolecular vacuum pumps

This technical specification outlines the standardized procedures for evaluating the performance of molecular pumps within the field of vacuum technology. The document establishes a unified framework for measuring key operational parameters, ensuring consistency and reliability across different testing environments and manufacturers. It focuses specifically on the unique characteristics of molecular vacuum pumps, addressing factors such as pumping speed, ultimate pressure, and gas throughput under defined conditions. The methodology described facilitates comparative analysis of pump efficiency and helps verify compliance with specific design requirements. By providing detailed guidelines for experimental setup and data interpretation, this document supports quality control processes and product development activities globally. It serves as a reference for engineers and technicians involved in the design, testing, and selection of vacuum systems requiring high-vacuum capabilities. The content ensures that measurement results are reproducible and comparable, thereby contributing to the overall advancement of vacuum engineering practices without imposing specific technical limitations on the pump designs themselves.