１存在的问题九五年初，我们在进行ＤＢ型先导式溢流阀试验时，发现有一批型号为ＤＢ—１—３０／３１５型溢流阀在调压过程中，绝大多数阀有啸叫现象，流量越大，啸叫越严重，并且伴有大幅度压力振摆，最大可达±５ＭＰａ。该阀原理图如图所示。ＤＢ型溢流阀结构图经检查... 1 problems In early 1995, we conducted a pilot-type DB-type pilot relief valve and found that a number of models for the DB-1-30 / 315 type relief valve pressure regulator in the process, the vast majority of valve howling Phenomenon, the greater the flow, the more severe howling, and accompanied by significant pressure swing, up to ± 5MPa. The valve schematic as shown. DB type relief valve structure check by ...