Everyone must have seen the body of a fully welded ball valve. We all know that the welded joints are generally designed for narrow gap thick wall submerged arc welding, and the fully welded valve bodies are mostly super thick cylindrical welded join...

Because of the special structure of the cryogenic valve, the installation of the cryogenic valve also has its special requirements. Because of the structural characteristics of the long-neck bonnet of the cryogenic valve, the direction of the stem of...

We must first understand how to deal with valve water leakage and steam leakage. First, we must understand why water leakage and steam leakage occur. The so-called knowing what is happening and knowing why. To maintain air tightness, the valve must h...

The center of rotation of the butterfly plate (that is, the center of the valve stem) is located on the center line of the valve body and the sealing surface section of the butterfly plate. The valve seat is made of synthetic rubber. When closing, th...

In the chemical control system with a high degree of automation, the regulating valve is used as the terminal execution device of the automatic regulating system, which receives the control signal to realize the regulation of the chemical process. It...

For valves under corrosive medium conditions, corrosion prevention is the most important part of chemical equipment. If the metal materials of chemical valves cannot be selected correctly, a little carelessness will damage the equipment, or cause acc...

Correct operation method of safety valve The safety valve has undergone pressure test and constant pressure before installation. When the safety valve is running for a long time, the operator should pay attention to checking the safety valve. During ...

The valve is in the fluid system, the device used to control the direction, pressure, and flow of the fluid is a device that allows the medium (liquid, gas, powder) in the piping and equipment to flow or stop and can control its flow. The valve is a ...

1) Make sure that the pipeline and valve have been flushed before operation. 2) The operation of the valve drives the valve stem to complete rotation according to the input signal of the actuator: when it rotates 1/4 turn (90°) in the forward directi...

Pre-maintenance before the operation of the new valve is an advanced construction concept. Its purpose is to protect the valve seat sealing device and prevent the valve seat from being damaged during installation, welding and commissioning. The pre-m...

The importance of valve selection The selection of the regulating valve structure is based on the comprehensive consideration of factors such as the used medium, temperature, pressure before and after the valve, flow, physical and chemical properties...

1. Management of technical data It includes national standards and related standards, valve drawings such as assembly drawings and processing drawings of vulnerable parts, valve processing technology and specifications, and related data accounts. 2.T...