What is ISO 16137 — Check valves of thermoplastic materials about?
ISO 16137 specifies requirements for design, functional characteristics and manufacturing of check valves made of thermoplastics materials intended to allow the flow of liquid fluids through the valve in one direction only and to prevent backflow, their connection to the pipe system, the body materials and their pressure/temperature rating between − 40 °C and + 120 °C, for a lifetime of 25 years, and also specifies their tests.
ISO 16137 is applicable to valves to be installed in industrial pipe systems, irrespective of the field of application and the fluids to be conveyed.
NOTE 1 Industrial pipe systems also include systems for water supply for general purposes, drainage and sewerage.
NOTE 2 Special requ...