变径接口
可通过被动阀或主动阀接口的变径来满足不同尺寸接口对接的需要。提高设备的使用率，降低使用成本。
变径接口的应用可以扩展为取样口、容器内清洗接口、窥视窗口等。
型号和接口尺寸参照表
Reducers union
For different size connect port
Different size of valve interface can be connected according to this adaptor. It improves the utilization rate of device, reduce the cost.
The application of adaptor can be extended to sampling port, cleaning interface of container and watch window.
