Not only the valve lever in the valve opens shuts in the process is transports the moving parts, the stress, moreover is the seal. At the same time, it receives the medium the impact and the corrosion, but also has the friction with the padding. Therefore when chooses the valve lever material, must guarantee that it has the enough intensity, the good resilience under the stipulation temperature, the anti-abrasion, the inoxidizability. The valve lever is vulnerable, when selection should also pay attention to the material the machining property and the heat treatment performance.We
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