When the regulating valve is made of graphite-asbestos, the lubricating oil should be added to the packing for about three months to ensure the flexibility of the regulating valve. If it is found that the packing pressure cap is pressed very low, the...

The cut-off valve, also called the cut-off valve, is the most widely used valve, which is mainly composed of a valve body, a valve clack, a valve cover, and a valve stem. The valve body and valve cover are pressure-bearing parts, and the valve clack ...

Pneumatic control valve is one of the widely used instruments in petrochemical enterprises. Its accurate and normal operation is of great significance to ensure the normal operation and safe production of the process equipment. Therefore, it is neces...

The body material of the desulfurization butterfly valve is: ductile iron, cast steel, stainless steel, etc. From the cost considerations, there are many spheroidal graphite cast irons. If the weather and temperature are considered in the north, the ...

In order to reduce the operating torque of the ball valve and increase the reliability of the seal, oil seal ball valves have appeared in recent years, and the special lubricating oil is injected between the sealing faces to form an oil film, which e...

Safekeeping ◆The purpose of storage and maintenance is to prevent damage to the valve during storage, or reduce quality. In fact, improper storage is one of the important reasons for valve damage. ◆Valves should be kept in an orderly manner. Small v...

Ball valves have been widely used in petroleum, chemical, power generation, paper, atomic energy, aviation, rocket and other departments, as well as people's daily lives. The ball valve can be divided according to the structure: First, the floating b...

With the progress and continuous reform of the times, my country's valve products have also been innovated with the change of the times. At present, in the valve market where environmental protection and safety are becoming more and more demanding, t...

The ball valve and the plug valve are the same type of valve, only the closing member of which is a ball, and the ball rotates around the center line of the valve body to open and close a valve. The ball valve is mainly used in the pipeline to cut, d...

Valves are generally divided into automatic valves and actuated valves. Automatic valves (such as safety valves, pressure reducing valves, steam traps and check valves) rely on changes in the medium pressure of the equipment or pipeline to achieve th...

In pipeline engineering, do the symbols of pipeline diameter DN, De, D, d, and Φ make it clear to everyone, let’s understand their meaning and differences together. 1. The meaning of DN, De, D, d, Φ Generally speaking, the diameter of a pipe can be d...

The radiator thermostatic valve is correctly installed in the heating system, and the user can adjust and set the temperature according to the requirements of room temperature. This ensures that the room temperature of a room is constant, avoiding th...