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中文简体Welded ball valves are widely used in various fields. Its superior quality and high-performance stability cannot be achieved by ordinary cast steel ball valves. The service life of fully welded ball valves is much longer than that of cast steel ball valves. Fully welded ball valves are widely used in various pipeline equipment such as city gas, city heating, petrochemical, shipbuilding, steel, pressure regulating stations, power plants, etc.
The pipeline transportation system occupies an important position in the transportation of natural gas, coal, oil, water, chemical solvents and other energy fluids. It is said that more than 90% of the natural gas in the country is transported by the pipeline system, and the valve control is the pipeline system. Important parts, then, what are the basic properties of welded ball valves?
zero seal
The sealing requirements of welded ball valves, ordering, butterfly valves, and globe valves must be zero-level, so as to ensure the effective cutoff of the downstream pipeline. If there are metal particles in the liquid medium being transported, it may affect the sealing effect of the valve. The sealing of the valve is different from the primary seal and the secondary seal. The former is a metal-to-metal seal, and the latter is a metal-to-rubber or PTFE material. . In the event of seal failure and medium leakage during medium transportation, emergency sealing should be performed to minimize the impact loss.
Fireproof and anti-static
The fireproof and antistatic design of the welded ball valve should also be the best. Otherwise, once the fire causes external leakage and internal leakage, the loss is second. If there is a problem with the pipeline transportation system of natural gas and chemical plants, there is still a lot of safety. hidden danger. When the ball part of the welded ball valve is rubbed and clamped by non-metallic substances, it is easy to cause static electricity, so the ball must be connected to the valve body. If it is to transport corrosive chemical medium fluid, then it is necessary to choose a welded ball valve made of anti-corrosion material.
In addition, welded ball valves also have basic properties such as temperature difference resistance, pressure resistance, and wear resistance. The quality and performance of welded ball valves are directly related to their production materials and production technology.
