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QTY型直动式调压阀在平衡状态下的溢流量,按沪Q/JB2840—81标准允许350升/小时,一些用户单位往往因不了解这一标准而提出询问,也有一此单位因实际需要希望溢流量能尽量减小或不允许泄漏。而在实际生产中,成品初试一次合格率能达到沪Q标准的;在较好的情况下约70～80%,有时仅能达到50％,分析原因主要在于阀杆与溢流阀座配合时很难达到完全密封,这里包含着加工和材料等因素,大致有三个方面:1、阀杆的球面是在车床上用样板刀车制,由于机床和刀具的原因,致使
QTY type direct acting pressure regulating valve in the equilibrium state of overflow, according to Shanghai Q / JB2840-81 standard allows 350 liters / hour, some users often do not understand this standard and asked, there is also a unit due to the actual It is desirable to expect that overflow will be minimized or not allowed to leak. In the actual production, the finished product first pass rate can reach the Shanghai Q standard; better 70 ~ 80%, sometimes only up to 50%, the main reason for analysis is that when the valve stem and the relief seat with It is difficult to achieve a complete seal, which contains processing and materials and other factors, there are roughly three aspects: 1, the stem of the spherical surface is in the lathe with a prototype knife system, due to machine tools and tool causes,