拍門產品介紹：
Product Introduction of Paimen:
拍門屬止回閥類產品，主要安裝在排水管道的尾端，用于防止外水倒灌。材質分為不銹鋼、碳鋼、鑄鐵等多種材料。
Paimen is a type of check valve product, mainly installed at the end of the drainage pipeline to prevent external water from flowing back. The materials are divided into various types such as stainless steel, carbon steel, cast iron, etc.
該產品是安裝在江河邊排水管出口的一種單向閥，當江河潮位高于出水管口，且壓力大于管內壓力時，拍門面板自動關閉，以防江河潮水倒灌進排水管道內。該產品是我公司自行研制開發出來的產品。該產品以Q/TF-B2771行業技術標準為準；按GB/T13927試驗要求進行試驗；設備公稱壓力（PN）：0.25-1.6Mpa；公稱通徑（DN）：200-2000mm。
This product is a one-way valve installed at the outlet of the drainage pipe by the river. When the tide level of the river is higher than the outlet pipe and the pressure is greater than the pressure inside the pipe, the flap panel automatically closes to prevent the river tide from flowing back into the drainage pipe. This product is independently developed by our company. This product is based on the industry technical standard Q/TF-B2771; Conduct the test according to the requirements of GB/T13927; Equipment nominal pressure (PN): 0.25-1.6Mpa; Nominal diameter (DN): 200-2000mm.
二、產品功能：
2、 Product Features:
拍門適用于給排水及污水處理工程的各種管道和水渠道作溢流、止回之用，亦可用作各種豎井井蓋，它僅用于單向水流的出水口。
Paimen is suitable for various pipelines and water channels in water supply and drainage and sewage treatment projects for overflow and check purposes, and can also be used as covers for various vertical shafts. It is only used for one-way water flow outlets.