丰满老熟好大BBBXXX,午夜高清无码视频在线观看,亚洲系列一区中文字幕,无码毛片AAA在线

Zhejiang Bahe Valve Technology Co., Ltd
Hotline:0577-86998906
BAHE CHINA

Our goal: to be a high-quality manufacturer of industrial control valves, gaining unanimous recognition from new and old customers

Our mission: To fully utilize the effectiveness of industrial control valves to achieve better results

Maintenance Methods for Electric Ball Valves

    

1. The electric ball valve should be stored in a dry and ventilated room, and both ends of the passage must be blocked.

2. Electric ball valves stored for a long time should be regularly inspected, cleaned of dirt, and coated with antirust oil on the processing surface.

3. After installation, the equipment should be regularly inspected.

4. All kinds of electric ball valves in operation shall be complete and intact.

5. The bolts on the flange and bracket should not be insufficient, and the threads should be intact without looseness.

6. Tighten the fastening nuts on the handwheel in a timely manner if they are found to be loose to avoid abrasion of the connection or loss of the handwheel and nameplate.

7. If the hand wheel is lost, it is not allowed to replace it with a monkey wrench, and it should be timely equipped.

8. The packing gland shall not be tilted or have no preload clearance.

9. For electric valves in environments prone to contamination by rain, snow, dust, sand, and other contaminants, their valve stems should be installed with protective covers.

10. The scale on the electric ball valve should be kept complete, accurate, and clear.


国内揄拍高清国内精品对白| 国产电影无码午夜在线播放| 亚洲中文字幕久久精品无码APP| H精品无码动漫在线观看| 浮妇高潮喷白浆视频| 97人人超碰国产精品最新O|