本国际标准规定了由热塑性材料制成的止回阀的设计、功能特性和制造要求，旨在允许液体流体仅在一个方向通过阀门，并防止回流，其与管道系统的连接，阀体材料及其压力/温度额定值在-40°C和+120°C之间，寿命为25年，并规定了他们的测试。 本国际标准适用于安装在工业管道系统中的阀门，不考虑应用领域和输送的流体。交叉引用:ISO 15493:2003TR 10358:1993ISO 9393-2:2005ISO 8659:1989ISO 12162:2009ISO 10931:2005EN 558:2017EN 1092-1:2018ISO 15493:2003/AMD 1:2016EN 12266-1:2012ISO 10931:2005/AMD 1: 2015ISO 7-1:1994EN 1759-1:2004ISO 7-1:1994/Cor 1:2007EN 1267:2012ISO 228-1:2000EN 736-3:2008ISO 898-1:2013ISO 1167-1:2006ISO 15494:2015ISO 15493:2003/Cor 1:2004EN 736-2:1997EN 805:2000ISO 6708:1995EN 736-1:1995ISO 7268:1983包含以下内容:修订，2019年9月

This International Standard specifies requirements for the design, functional characteristics and manufacture 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. This International Standard is applicable to valves to be installed in industrial pipe systems, irrespective of the field of application and the fluids to be conveyed.Cross References:ISO 15493:2003TR 10358:1993ISO 9393-2:2005ISO 8659:1989ISO 12162:2009ISO 10931:2005EN 558:2017EN 1092-1:2018ISO 15493:2003/AMD 1:2016EN 12266-1:2012ISO 10931:2005/AMD 1:2015ISO 7-1:1994EN 1759-1:2004ISO 7-1:1994/Cor 1:2007EN 1267:2012ISO 228-1:2000EN 736-3:2008ISO 898-1:2013ISO 1167-1:2006ISO 15494:2015ISO 15493:2003/COR 1:2004EN 736-2:1997EN 805:2000ISO 6708:1995EN 736-1:1995ISO 7268:1983Incorporates the following:Amendment, September 2019