亚洲 欧美 字幕 免费,薰衣草秘密研究中心,亚洲IV秘籍精选,小学生桶小学生ppt免费视频,蓝苺奇幻之旅,在线免费观看视频a,欧美日韩亚洲一区二区国产,狼人访问紧急通知最新版下载,美女黄18岁以下禁看,国产一卡2卡3卡四卡精品国色无边,国产一卡2卡3卡四卡精品国色无边

1. In order to ensure the most accurate measurement and the water meter installation section and pipeline before the inlet of the same at least more than 5 times the gauge diameter of straight pipe, water meter installed outlet at least more than 2 times the gauge diameter of straight pipe.

2. The water meter of upstream and downstream piping not reducing

3. Suggest to install flow control devices (such as valve) and filtering equipment

4. The flange sealing ring into the pipe inner or misalignment is not allowed

5. Must be thoroughly clean the pipe before installation of water meter, to avoid damage meter

6. Water meter in the direction of flow and pipe flow in the same direction

7. After water meter installation, slowly drain pipe, prevent broken to pieces by high speed air flow meter.

8. Installation position shall ensure that the pipe full of water, the bubbles will not focus on the table, should avoid to its highest level meter installed in the pipeline

9. We should protect water meter from hydraulic shock

10. Small diameter rotor meter must be installed level. Before and after or tilt will result in lower sensitivity.