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See Chinese contents: CJ/T 217-2013 CJ/T 217-2013: Compound quick air inbreathe-release valve for water supply pipeline
This Standard specifies the term and definition, structure style, product model, materials, requirements, test methods, inspection rules, marks, product specification, product packaging, storage and transportation of compound quick air inbreathe-release valve for water supply pipeline (hereinafter referred to as air inbreathe-release valve). This Standard applies to the air inbreathe-release valve of nominal size of DN15~DN300, nominal pressure of not more than PN25, and water temperature of 0~40 degree-Celcius for water supply pipeline.
