Safe backflow preventer in the system security protection. When the system pressure is more than a specified value, the relief valve (open, part of the system gas discharged into the atmosphere, make the system pressure shall not exceed the allowable values, thus ensuring the system is not an accident because the pressure was too high. The relief valve is also called the overflow Industrial Valves. Graphic form for several typical structures of the relief valve. As the piston valve, valve core is a tablet. Air pressure in A piston, when pressure exceeds set by spring force TVC, the piston is A top drive, part of the compressed air is discharged into the atmosphere through the valve port; When air pressure is lower than the TVC, spring driving the piston down, close the valve port. A protection system for the damaged Industrial Valves because the pressure was too high, once the system and device or in medium pressure more than the set value, will automatically release the pressure, so as to achieve the goal of security and protection. Another impulse safety valve, pilot operated relief valve, safety valve switch, security, decompression valve, such as static weight type relief valve. Spring loaded safety valve rely mainly on the spring force and work, spring loaded relief valve is closed and not closed, usually inflammable, explosive or toxic medium should choose enclosed, steam or inert gases can choose not enclosed, in spring safety Industrial Valves with a wrench and not with a wrench. Spanner role mainly check the flexibility of the disc, sometimes also can be used as a manual emergency pressure relief, as shown in figure 3. Relief valve lever relies mainly on the lever and weight and the power of the work, but as a result of huge relief valve lever tend to limit the scope to choose. Higher temperature when choosing safety valve with radiator. Safe backflow preventer displacement is the main parameter, the displacement depends on the seat of the diameter and the opening of the disc height, by the opening height is different, is divided into tiny qi type and whole qi type two kinds. Tiny qi type refers to the opening height of the disc seat throat diameter of 1/40 ~ l / 20. All rev type refers to the opening height of the disc seat throat diameter of a quarter. In this paper, the keyword search: more technical articles valve product supply information
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