The functions of ultra-high temperature ball valves are as follows: (1) Purging and anti-blocking in the central cavity The titanium dioxide industry, chemical industry and other large boilers such as the bottom slag discharge or the top high-temperature liquid outlet have extremely high requirements...
The high-temperature ball valve generally adopts a metal hard sealing structure, and the ball and valve seat adopt hardening technology, including supersonic spraying, nickel-based spray welding, special surface hardening, cemented carbide spray welding, and high-impact, high-hardness ceramic materials...
3. Requirements for valve structure The design of the valve structure should avoid the failure of the valve caused by the coking of the coal slurry and facilitate cleaning. Coal oil slurry has a characteristic. If the flow is not smooth or stationary, it will deposit and possibly polymerize,...
1. Requirements for valve materials Direct liquefaction is also called hydroliquefaction. In the hydrogenation process, the valves, pipelines and related equipment are used in high-temperature and high-pressure hydrogen, and damage caused by hydrogen is a big problem. Corrosion is also serious...
A valve is one of the most important parts in the field of power production. Its main function is to regulate the flow and pipeline transportation. Some problems and failures will often occur in daily use. If it is not checked and repaired in time, there will be more serious production and economic...
In the actual operation of steam turbines, the pressure relief valve is generally prone to jamming. When the unit impulse reaches the rated speed and exits the high-pressure start oil pump, the pressure relief valve of the main oil pump inlet is prone to jamming, which makes the main oil pump...
1. Gas holes A gas hole is a small cavity formed due to the gas that has not escaped in the solidification process of the metal. It has smooth inner walls and contains gas; there is a high reflectivity to ultrasonic waves. However, it is spherical or ellipsoidal, that...
The main failure causes of ultra-high pressure valves are cavitation and erosive wear. Many factors affect cavitation and erosion, mainly the mechanical properties of materials, fluid mechanics factors and environmental influences. Many methods can be used for improving the resistance to cavitation...
Multinational companies continue to promote the development of the international valve market due to the further internationalization of the world economy. The regionalization of international trade has become another major feature. In addition, major valve manufacturers in Italy, Japan and South...
In China, electric devices and electric actuators for valves belong to different industries. Electric devices belong to the general machinery industry. Since the 1950s and 1960s, electric devices have been introduced in the form of complete sets of equipment and technology and gradually...