The maintenance operation standard of valve replacement, and the maintenance process requirements of

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

1) Check the valve line on the valve core and valve body, there should be no grooves, pores and traces across the sealing surface that affect the sealing performance on the valve line, and the contact should be uninterrupted throughout the whole circumference. If a defect is found that affects the sealing performance, it should be treated with grinding or other treatment.

2) Check the connection between the butterfly and the rocker arm, adjust the gap between the gasket and the rocker arm to be between 1, should not be too large and should not be too small, otherwise it should be adjusted. The fastening nut connection between the valve butterfly and the rocker arm should be firm, the positioning solder joints should be complete and free of cracks, and the gap between the valve butterfly shaft and the rocker arm ring should meet the requirements.

3) Check that the gap between the lever shaft, the rocker arm shaft and the size bushing and the broadcast arm should meet the requirements, and the surface of each shaft and the inner wall of the bushing should be smooth and clean without pits.

4) Check the packing in the large sealing cover and flange cover, which should be complete, and should be replaced if damaged.

5) Check that the sealing surface of the valve cap and valve body should be complete, and there should be no grooves, sand holes and penetrating scratches that affect the sealing effect.

6) Clean and check the sealing surface at the junction of the bracket, flange cover and valve housing, and clean and shovel away the old gasket adhered on the sealing surface. The sealing surface should be free of defects that affect the sealing effect.

7) All keys and keyways should be cleaned and should be well connected.

Management system.

1.No one is allowed to carry fire or wear chemical fiber clothing into the valve chamber area.

2.Without the permission of the administrator shall not enter the valve room, due to the need to enter the valve room according to the requirements of registration, enter the valve room must be accompanied by the administrator, non-duty personnel should leave the valve room as soon as possible.

3.The valve room management personnel must be trained and familiar with the structure and operation instructions of various equipment in the valve room before they are allowed to operate, otherwise they are not allowed to be on duty alone.

4.There shall be no open flame within the valve room, and no flammable and explosive materials shall be stacked.

5.The fire escape of the valve room shall be kept unblocked, and it is strictly forbidden to pile up any sundries in the valve room and on the access passage.

6.Remove weeds and debris from the valve chamber frequently.

7.The management of fire extinguishing equipment must be determined in four ways, namely: fixed-point placement, fixed-person supervision, regular inspection, and regular maintenance.

8.Fire and safety systems are guaranteed to be in standby condition.