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Raised face flange and concave and convex face flange
Flange is used for the connection between two devices. The abbreviation refers to the form of the sealing surface. There are holes on it. The two flanges are connected by bolts. It is generally used for The mutual connection between the shaft and the shaft is also used for the connection between the pipe ends; […]
Comparison table of valve diameter and medium flow rate
It is well known that the flow rate and flow rate of the valve mainly depend on the diameter of the valve, and also related to the resistance of the valve structure to the medium. At the same time, it has a certain internal connection with various factors such as the valve pressure, temperature and […]
The matching function and principle of pneumatic valve accessories
Pneumatic valve is an actuator that uses compressed air to drive and operate the valve. Its opening and closing speed is relatively fast. It is often used for fast two-position cut-off and can also be used to adjust flow. Because it mainly relies on air to perform operations, so it has high practicability in flammable […]
The difference and application of stainless steel 430, 304, 316
Stainless steel 430, 304,316 are the material of valve body, valve stem/shaft, or valve disc/plate. 430 ferritic stainless steel containing more than 12% chromium can prevent oxidation caused by natural factors. It is called stainless steel. It belongs to 430 ferritic stainless steel. It has low thermal expansion rate, excellent formability and oxidation resistance. The […]
Principles of valve selection in the petroleum and chemical industry
Faced with so many valve classifications and such complex various working conditions, to choose the most suitable valve product for piping system installation, you should first understand the characteristics of the valve; secondly, you should master the steps and basis for selecting the valve; and then you should follow the choice of oil , The […]
Chinese marine valve product standard encyclopedia
Marine valves are equipment used to control the pressure, flow and flow direction of fluids in marine pipelines to meet the environmental conditions of ships. A valve is a control device for a fluid pipeline. Its basic function is to connect or cut off the flow of the pipeline medium, change the flow of the […]
Description of valve pressure& installation direction requirements
As the name implies, the pressure of the valve refers to the pressure that the valve can withstand, that is, the pressure level of the valve is not lower than the design pressure level of the pipeline. The pressure-bearing direction refers to the closed state of the valve after the valve is applied to the […]
What are the main factors affecting valve sealing?
Valve leakage is very common in daily life and industrial production, and the impact is very large. It will cause waste or bring danger to life. For example, the leakage of tap water valve will lead to serious consequences, such as the chemical industry. Toxic, harmful, flammable, explosive and corrosive media leakage, etc., serious threats […]
Reasons and solutions for leakage of valve sealing surface
The valve is the most used control component in the fluid system. It can be used to switch or control the flow direction and adjust the function. From the simplest cut-off function, the valve is sealed in the machine. Its function is to prevent the medium from In the cavity where the part is located, […]
Description of electric valve connection
Electric valve wiring methods are classified according to different use requirements and different field conditions, and the wiring methods used by electric actuators with different functions are also different. The user should have an understanding of the relevant knowledge of the wiring, so as to avoid unnecessary failures. On the one hand, the entire circuit […]