Ultra-High-Pressure Pneumatic Pressure Reducing Valve

Abstract

The general industrial pneumatic system pressure is less than 8 MPa. Aerospace and other extreme environments require pneumatic energy and its control valves to promote the development of small volume, lightweight, high-performance ultra-high-pressure pneumatic control valves. The pressure of the self-contained pneumatic energy device has reached 15–80 MPa, and the hydrogen storage cylinder pressure grade of the hydrogen energy vehicle is as high as 35 and 70 MPa. At present, the general industrial gas pressure is 0.5 MPa, and the usual high-pressure pneumatic control pressure is only about 5 MPa. The aerospace and aircraft industries need small, high-power gas energy sources, and pressure levels are gradually rising. This chapter introduces the structure and principle of 35 and 70 MPa pneumatic pressure reducing valves and introduces how to analyze the flow field distribution in the ultra-high-pressure pneumatic valve by using computational fluid dynamics (CFD) method through mathematical model, as well as the relationship between the temperature change at the throttle position and the structure size.