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2024-09-30

A Comprehensive Guide to Handling Valve Welding Defects: Ensuring Industrial Production Safety

For surface slag inclusions, they can be removed using a grinding wheel or steel wire brush, and then repaired. When performing welding repair, it is important to clean the bevel thoroughly and adjust the welding process parameters to ensure a good fusion between the weld metal and the base material. The treatment of internal slag is relatively complex. If the slag is shallow, carbon arc gouging can be used to remove the slag area, followed by welding. If the slag is deep, methods such as drilling may be needed to remove the slag, and then welding can be carried out. During the welding repair process, attention should be paid to controlling the welding heat input to avoid deterioration of the weld structure due to overheating.

2024-09-30

What are the selection criteria for electric butterfly valves and pneumatic butterfly valves?

The most commendable feature of electric butterfly valves is their sealing performance. The sealing of the valve stem shaft diameter is achieved by a very sealed sealing ring. This sealing ring is made of graphite and does not get stuck with the butterfly plate of the electric butterfly valve. Therefore, the sealing performance is very excellent and zero leakage, ensuring fire safety. Electric butterfly valves that are zero leakage and have good sealing performance are the preferred choice for many customers.

2024-09-30

The causes and solutions for internal leakage of the natural gas ball valve

The commonly used ball valves on natural gas pipelines are fixed-axis ball valves. The general inspection method is: rotate the valve to the fully open or fully closed position, and check for leakage through the discharge port of the valve body. If the discharge can be completely cleaned, it indicates good sealing. If there is always pressure discharge, it can be considered that the valve is leaking, and the valve should be dealt with accordingly.

2024-09-30

Overview of Cast Iron Gate Valve and Introduction of Its Advantages and Disadvantages

The closing element of the Z41H forged steel gate valve is a gate plate. The valve operates by the gate plate moving vertically along the axis of the passage. It is mainly used in pipelines to cut off the medium, either in the fully open or fully closed state. It is not suitable for regulating flow or transporting slurry media. It has the advantages of low fluid resistance, smaller torque required for opening and closing, and a simple shape and structure. The forged steel gate valve can be used in pipelines where the medium flows in both directions. When fully open, the sealing surface is less eroded by the working medium compared to the stop valve.

2024-09-30

Can stop valves and gate valves be used interchangeably?

Valves such as stop valves, gate valves, butterfly valves, check valves and ball valves are all indispensable control components in various piping systems nowadays. Each type of valve has differences in appearance, structure and even function and application. However, stop valves and gate valves share some similarities in appearance, and both have the function of cutting off the pipeline. Therefore, many people who have little contact with valves confuse the two. In fact, if you observe carefully, the differences between stop valves and gate valves are quite sign