Spirax-Sarcovalvemechani***forB4seriesverted***etsteamtrap.Spirax-Sarcovalvemechani***less***etisthedevicethatallowsthecondensateandairtodrainfromthetrap.Themechani***isaleverandseatoperation,itisheldinplacebyscrewingtheseatintotheoutletportwithinthetrap.Withtheinverted***etattachedtothismechani***,thesteampressurewithinthe***etkeepstheleverupinturnkeepingtheseatclosedwhensteamispresent.Whenthesteamcoolsandturnstoaliquidstate(condensate),thetrapfillswithcondensatecausingthe***ettodropandthisopenstheseattoallowthecondensateandairtodrain.斯派莎克直接作用式减压阀BRV73阀门机制B4系列verted吊桶式疏水阀。斯派莎克直接作用式减压阀BRV73机构少铲斗装置，使冷凝水和空气从陷阱排出。该机构是一个杠杆和座椅的操作，它在适当的位置通过螺纹连接在座椅进入出口端口陷阱内举行。与连接到这个机制倒斗，斗内的蒸汽压力保持杆，反过来保持座位关闭时蒸汽存在。当蒸汽冷却并变成液体状态（冷凝），陷阱充满冷凝水造成杯水车薪，这将打开座椅，让冷凝水和空气排出。)