As the feed stream flows through the choke, the resulting J-T expansion and cooling causes some gas and most of the water vapor to liquefy.
当原料气流过节流件时，产生焦耳-汤姆逊膨胀及降温，使部分气体和大部分水蒸汽液化。
2
This combination of disc springs and dual valve seal rings protects against expansion and contraction due to heating and cooling. This ensures dependable operation, even after years of service.
盘簧与两个密封环的组合，可防止因加热或冷却产生的膨胀和收缩，由此确保阀门即使使用多年后仍运行可靠。
3
In order to save costs and avoid using two thermal expansion valves, the paper proposed a new throttle mechanism used for the heat pump and realizes the best match of the cooling and heating.