Maintenance of stainless steel ball valve, how to maintain ball valve throttle valve daily?

Stainless steel ball valves are easy to contact with other metal and iron products during the manufacturing process. In order to keep stainless steel valves rust-free, the easiest way is to follow the following process.

First: after the blank is finished, after pickling, it must be rinsed, if there are sand holes or perforations, it should be gas shielded welding with argon arc welding. Then grinding, and then solid melting;

Second: finished products, after the completion of processing and pressure test. It should be rinsed with water with anti-rust powder.

Third: try to use wooden boxes and packaging during transportation, and do not touch metal products.

Fourth: After installing the pipeline, it should be regularly maintained and maintained, such as lubricating oil on the valve stem. Open and close the valve several times appropriately. It makes the ball, valve stem, and sealing surface not easy to assimilate.

Stainless steel ball valves generally have two structures: reduced diameter and non-reduced diameter channel. Regardless of the structure, the flow resistance coefficient of the ball valve is relatively small.

In particular, the so-called full-flow type, that is, the ball valve with no reduced diameter, because its channel diameter is equal to the inner diameter of the pipeline, the local resistance loss is only the frictional resistance of the same length of pipeline, that is, among all valves, the flow resistance of this ball valve is the smallest. In rocket launch and its test system, the resistance of the transmission pipeline is required to be as small as possible.

There are two ways to reduce the resistance of the piping system: one is to reduce the fluid flow rate, for which it is necessary to increase the pipe diameter and valve diameter, which often has a negative impact on the economy of the piping system, especially for the cryogenic delivery system (liquid hydrogen).

1) Reduce the local resistance of the valve, therefore, the ball valve naturally becomes the best choice.

2) The opening and closing of the ball valve is fast and convenient.

Since the ball valve only needs to turn 90° to complete the full opening or closing action under normal circumstances, it is easy to achieve fast opening and closing. It can be opened and closed quickly, and the opening and closing time of some structures is only to ensure that it can be used in the automation system of the test bench. When the valve is opened and closed quickly, the operation is shock-free.

3) The ball valve has good sealing performance.

The seat of most ball valves is made of elastic materials such as PTFE, and the sealing pair composed of metal and non-metallic materials is usually called soft seal. Generally speaking, the tightness of soft seals is easy to guarantee, and the processing accuracy and surface roughness of the sealing surface are not very high.

4) The ball valve has a long service life.

Due to the good self-lubrication of PTFE, the friction and wear with the ball are small, and due to the improvement of the ball processing technology, the roughness is reduced, so as to improve the service life of the ball valve.

Routine maintenance. 1. Attention should be paid to the storage environment of the valve, which should be stored in a dry and ventilated room, and both ends of the passage should be blocked.

2. The valve should be checked regularly, and the dirt on it should be removed, and the anti-rust oil should be applied on its surface.

3. After installation and application, the valve should be regularly overhauled to ensure its normal operation.

4. Check whether the sealing surface of the valve is worn, and repair or replace it according to the situation.

5. Check the trapezoidal thread wear of the valve stem and valve stem nut, whether the packing is outdated and invalid, etc., and replace it as necessary.

6. The sealing performance of the valve should be tested to ensure its performance.

7. The valve in operation should be in good condition, the bolts on the flange and bracket are complete, the thread is not damaged, and there is no loosening phenomenon.

8. If the handwheel is lost, it should be completed in time, and cannot be replaced by a live wrench.

9. The packing gland is not allowed to be skewed or there is no preload clearance.

10. If the valve is used in a harsh environment and is susceptible to contamination by rain, snow, dust, wind and sand, a protective cover should be installed for the valve stem.

11. The ruler on the valve should be kept complete, accurate and clear, and the lead seal and cap of the valve.

12. The insulation jacket should be free of depressions and cracks.

13. Avoid knocking on the valve in operation, or supporting heavy objects.

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 are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, 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. The non-metallic material parts should be taken out of the detergent immediately after cleaning, and there is no need to soak for a long time;

2. Metal material components can be cleaned with gasoline, and non-metallic material parts can be cleaned with mineral water or ethanol;

3. When cleaning, pay attention to all vegetable oils, stains, glue and dust adhered to the boundary layer;

4. When the ball valve is disassembled and reinstalled, care should be taken to avoid damaging the protruding surface of the parts, especially the parts of non-metallic materials, and it is recommended to use common tools when removing the O-ring;

5. Another point is that the new parts must be cleaned up during installation;

6. The lubricating grease used. It is necessary to be compatible with the ball code of this valve metal composite materials, rubber products, plastic parts and media.

7. Normal working nature, maintain a harmonious environment, guess the temperature and pressure ratio;

8. When the ball valve is turned off, the internal structure of the oil circuit plate is slow and there is a stressed liquid, and the working pressure of the pipeline before the overhaul makes the gate valve in the open position;

9. The middle and downstream pipelines can only be disassembled and assembled after the working pressure has been removed;

10. If there is a slight leakage on the filler, the stem nut must be clamped (the lock does not have to be tight, the leakage can be terminated).

The ball valve throttle valve is widely used in various industries, and the size is small, the switch is lightweight, the structure is relatively simple, and the most important thing is that it is more convenient to maintain, and the mesh is more reliable and sealed. However, in the process of use, we must pay attention to maintenance work, such as the following points:

1. Cleaning. In the process of long-term use of ball valve throttle valve, we must pay attention to regular cleaning, and the general personal quality can be cleaned with water.

2. a valve seat. For ball valves, throttle valves, and valve seats, they are machined by machine. If the valve seat is seriously damaged, it must be replaced in time.

3. Wearing parts.

The packing of the ball valve throttle valve has the physical properties of the sealing gasket, etc., which need to be overhauled regularly, and it should be replaced within a certain period of time, and if the valve core and gag piece are checked if there is a sensitive crack or aging, it must be replaced according to the situation, but the diaphragm must be replaced after two or three years of use.