DIN 3441-1-1989DIN 3441-2-1984DIN 3442-1-1987DIN 3442-2-1980DIN EN ISO 16135-2004
适用范围
This Standard specifies requirements and tests for ball valves in thermoplastics materials for isolating service, for control service and to divert/mix fluids. It is applicable to hand or power operated valves to be installed in industrial pipe systems, irrespective of the field of application and the fluids to be conveyed.