The difference between ball valve and gate valve

The difference between a ball valve and a gate valve is that the ball valve can only be opened and closed, and cannot adjust the flow. In fact, if you open and close it halfway, the flow through it fluctuates greatly. In addition, if the ball valve is artificially opened and closed Operation, it will also damage the ball valve and shorten its life. The gate valve can only adjust the flow roughly, and the fluctuation is not large, which can be used for rough adjustment of the flow. And half-opening and half-closing also affect its life.