PN20青铜丝扣升降式止回阀KITZ北泽CastBronzeLiftCheckValveThreadedendstoBS21F***高工作压力120℃压力变动小的水、油、气2.1MPa(21bar)饱和蒸气1.0MPa(10bar)材质[Materials]零件[Parts]材质阀体[Body]青铜阀盖[Cap]黄铜(DN10-DN50)黄铜(DN65以上)阀瓣[Disc]青铜尺寸[Dimensi***](mm)DNmm101520253240506580inch3/81/23/4111/411/2221/23L4453657785100119139158H262834425056677991)