What is the difference between them in use?
Single axle butterfly valve without pin, there is no eye at the back, it is necessary to remove the plate, it is not easy to remove. Two axis, non pin butterfly valve, with a screw eye at the back, for easy disassembly
It is generally divided into the upper shaft and the lower shaft. In the assembly process than the single axis slightly harder, if you want to further understand, can add my QQ 51737440, 5, I have here electronic chart, can further understanding.
In the soft sealing butterfly valve, no pin valve shaft, there are two main ways of connection: 1, through the shaft without pin, 2, double shaft without pin, through the shaft without pin, in the design is the most basic method, design simple. When the shaft is machined, the double half shaft has a certain degree of difficulty in making it.
