建议在防 回流阀前安装一个过滤器,防止止回阀受到污染和阀门在再增压期间出现泄漏或溢出。
The installation of a strainer ahead of the backflow preventer is recommended to prevent fouling of the check assembly and resultant spillage from the valve during repressurizing.
建议在防 回流阀前安装一个过滤器,防止止回阀受到污染和阀门在再增压期间出现泄漏或溢出。
The installation of a strainer ahead of the backflow preventer is recommended to prevent fouling of the check assembly and resultant spillage from the valve during repressurizing.
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