香港六合彩开奖/WD 9635-4

Eliminado

Un grupo de trabajo ha preparado un borrador.

搁别别尘辫濒补锄补谤谩香港六合彩开奖 9635-4:2014

Resumen

香港六合彩开奖 9635-4:2014 specifies construction and performance requirements and test methods for air valves, intended for operation in irrigation systems with water at temperatures not exceeding 60 掳C, which can contain fertilizers and other chemicals of the types and concentrations used in agriculture.

It is applicable to hydraulically operated air irrigation valves of DN 15 diameter or greater, designed to be directly operated, i.e. the force is applied to the obturator by the float, either directly or via a mechanical linkage. The valves can be operated by a force applied through an adjustable pilot valve.