Experimental and numerical research on back pressure characteristics of a new structured back pressure valve

As an important element to maintain pressure stability in pipelines, back pressure valves play a vital role in high-pressure fluid control. With the continuous development of high-pressure flow control technology, the performance and adaptability of back pressure valves put forward higher requirements. At present, domestic and foreign back pressure valve products have problems such as poor adaptability to fluid media, insufficient wear resistance and easy to jam. Aiming at these problems, a new type of back pressure valve with jeweled ball seat structure is developed in this study, and the effects of opening degree, initial pump flow and stroke on the internal flow field and performance of the back pressure valve are investigated using water as the flow medium. Numerical simulation and experimental verification show that the inlet pressure can be up to 30 MPa, and under the highest pressure design condition, the fluid pressure flowing through the flow path between the spools will be reduced from high pressure to atmospheric pressure, with a jet appearing in the center of the outlet and a vortex forming in the area near the outlet wall of the slit.