斯派莎克VB21破真空器VB21种小型通用破真空器，主要用于冷凝蒸汽（蒸汽）和液体系统。用于在蒸汽系统压力低于大气压力时，破除管道真空。·保护设备不受真空损坏·同时，可有效排除管道和换热器中的冷凝水。斯派莎克VB21破真空器安装VB21空阀必须安装于垂直位置，系统连接口位于破真空阀的底部。如用于蒸汽系统，排空阀必须安装于系统的处，与防止阀被冷凝水侵没。SpiraxSarcoVB21kindsof***allgeneral-breakingvacuum,mainlyforcondensingvapor(steam)andliquidsystems.For,whenthesteamsystempressurebelowatmosphericpressure,thevacuumpipebreak.·Protectequipmentfromdamagetothevacuum·Atthesametime,caneffectivelyexcludepipesandheatexchangercondensate.InstallationVB21airvalvemustbeinstalledinaverticalposition,thesystemconnectorlocatedonthebottomofthevacuumbreakvalve.Asforthesteamsystem,emptyingvalvemustbeinstalledonthehighestpointofthesystem,andtopreventcondensationofwatervalveisnotinvaded.)