The high-pressure liquid refrigerant through the expansion valve, because the expansion valve throttling pressure drop, the refrigerant into normal temperaturelow pressure liquid.
常温高压的液体冷媒流过膨胀阀，因为膨胀阀的节流作用压力降低，使得冷媒变成常温低压的液体。
2
The structure of compact, light weight, it could be that the media system for low-temperaturevalve structure of the most reasonable.
结构紧凑、重量轻，可以认为它时用于低温介质系统的最合理的阀门结构。
3
Limited by the ring material, the use of butterfly valve pressure and lowtemperature range.