Testing system of steam hydrophobic valve type

The invention discloses a testing system of a steam hydrophobic valve type, and the system comprises a high-pressure tank device which is used for providing steam with the specific testing pressure and temperature and hot condensed water for a tested drain valve, steam and hot condensed water pipes which are connected between the high-pressure tank device and the front end of the tested drain valve, a discharge pipe which is disposed in the direction of the rear end of the tested drain valve, a pipe-type telescoping joint which is connected between the rear end of the tested drain valve and the discharge pipe, and a monitoring device which is used for monitoring the on/off of the tested drain valve. The monitoring device comprises a first sight glass which is disposed between the pipe-type telescoping joint and the rear end of the tested drain valve. The first sight glass moves along with the stretching and drawing of the pipe-type telescoping joint. The system can achieve automatic control, and is used for the type tests of different types of stream drain valves in different nominal sizes.