Pumps - Shaft sealing systems for centrifugal and rotary pumps (ISO 21049:2004); English version EN ISO 21049:2004
Edition 2005-11

Devices for in-situ generation of biocides - Ozone; German version EN 17971:2024
Edition 2024-09

Technical specifications for centrifugal pumps - Class I (ISO 9905:1994)
Edition 1997-03

Wastewater treatment plants - Part 9: Odour control and ventilation; German and English version prEN 12255-9:2021
Edition 2021-09

Petroleum, petrochemical and natural gas industries - Non-metallic materials in contact with media related to oil and gas production - Part 2: Elastomers (ISO 23936-2:2011); English version EN ISO 23936-2:2011
Edition 2012-03