Requirements of JZC350 Concrete Mixer on Quality

What requirements JZC350 concrete mixer should meet to become a qualified JZC350 concrete mixer?
First,the sealing performance of JZC350 concrete mixer, not only the water supply system should be sealing, the pipelines, joints and valves should not have water leakage. The suction valve should be well sealed. After the water pump stops working for 30 minutes, it can still work properly.
Second,the feeding mechanism of JZC350 concrete mixer, a qualified feeding mechanism should be safe and reliable. Besides, when the concrete mixer overloads by 10 percent, the concrete mixer can brake safely in any place and the gliding speed of hopper should not exceed 10mm per second. As for the centralized driving feeding mechanism, the top dead center should be equipped with lifting safety device. As for the respective driving feeding mechanism, both the top and the lower dead center should be equipped with automatic stop device. The hopper should run steadily.
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