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。
At present, the development and production of the main products are butterfly valve, check valve, gate valve, ball valve, strainer valve, globe valve, slurry valve, diaphragm valves and so on.
目前，开发生产的主要产品有蝶阀、球阀、止回阀、闸阀、截止阀、浆料阀、隔膜阀等。
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