Spring full-open safety valve acting as nitrogen sealing valve, with nozzle type valve seat, valve body separated from valve seat and enlarged outlet branch pipe. Due to its large opening height, its discharge capacity is high. At this opening height, the displacement of the medium passing through is determined by the sectional area of the valve seat channel rather than by the sectional area of the annular clearance of the valve disc opening. In order to achieve a large opening height, both the principle of increasing the impact area of the medium and the principle of recoil action of the jet beam are used.

所以能达到高排放能力还有赖于：由于阀座通道截面积没有因导向筋的存在而缩小，因而介质流动畅通；不仅在阀座 通道中，而且在阀瓣打开的环状间隙处都没有涡流现象。除此而外，阀体和出口支管的通道截面积都较大。由于排放能力高，阀的阀座通道截面积可以较小，从而使阀门易于密封。

Therefore, achieving high discharge capacity also depends on: since the sectional area of the valve seat channel is not reduced due to the existence of the guide rib, the medium flow is smooth; There is no eddy current not only in the valve seat channel, but also in the annular gap where the valve disc opens. In addition, the channel sectional area of valve body and outlet branch pipe is large. Due to the high discharge capacity, the sectional area of the valve seat channel of the safety valve can be small, which makes the valve easy to seal.

在通常的阀结构中，阀座做成与阀体分离的喷嘴形式。，所以闷座不受变形的影响。阀体与喷嘴之间的螺纹间隙的选择应使得喷嘴能够自由 膨胀而不受阀体变形的影响。对于在高温高压下使用的阀，采用"热阀瓣"并将其嵌入到阀瓣座中。喷嘴和'热阀瓣" 的尺寸和材料应选配得当，以使它们的热膨胀相同，不发生相对位移。

In the normal safety valve structure, the valve seat is made into a nozzle separated from the valve body., Therefore, the closed seat is not affected by deformation. The thread clearance between the valve body and the nozzle shall be selected so that the nozzle can expand freely without being affected by the deformation of the valve body. For safety valves used under high temperature and high pressure, use "hot disc" and insert it into the disc seat. The size and material of the nozzle and the "thermal disc" should be properly selected to ensure that their thermal expansion is the same without relative displacement.

阀瓣的导向套与阀体的连接为非刚性的，并且不接触热 的或脏的介质，从而使阀容易开启和回座。阀杆和阀瓣之间通过淬火钢球来联接。这种机构能保证阀杆不受弹簧偏 斜的影响而自动对准，并且能防止阀瓣被卡住。

The connection between the guide sleeve of the valve disc and the valve body is non-rigid and does not contact hot or dirty media, so that the safety valve is easy to open and reseat. The valve rod and valve disc are connected by hardened steel ball. This mechanism can ensure that the valve rod will not be affected by spring deflection and automatically align with the center, and can prevent the valve disc from being stuck.

有了良工阀门代理上面的小总结，希望对广大客户有所帮助，如果有什么不理解的或者寻求帮助的请点击我们的网站：http://www.jnlgvf.com或者来电咨询，我们会尽全力为您

With the summary above of Lianggong Valve Agency, I hope it can help our customers. If you have any questions or need help, please click our website: http://www.jnlgvf.com Or call for consultation, and we will do our best to solve it for you