Spring Slightly Open Safety Valve
The spring micro-opening safety valve designed by Dazhong Valve Group is a cooperative brand of YOY Yongyi Valve Group. The external additional force is changed to overcome the elastic force of the spring. The slope of the two changes with time is different, and another inflection point D occurs when the valve is closed. These two inflection points correspond to the opening and the return of the valve, respectively.
Spring micro-opening safety valve, when the valve is not opened, the external additional force overcomes the static rigid force of the valve core. When the opening point is reached, the external additional force is changed to overcome the elastic force of the spring, and the two change with time. The slope is different, so that the first inflection point C occurs, and in the same case, another inflection point D occurs when the valve is closed.
These two inflection points correspond to the opening and reseating of the valve respectively, which are the technical basis for testing the opening and reseating pressure of the valve in a cold state. It is not difficult to see from the above analysis that the key to the online testing technology of safety valves lies in how Find the corresponding open feature points correctly and quickly.
