The ZJHL pneumatic diaphragm cage control valve is primarily designed to reduce noise in compressible fluids. To accommodate gas throttling, diffusion, and expansion, the sleeve features numerous symmetrical orifices that minimize pressure drop. The fluid passage adopts an S-shaped streamlined design, while the valve plug employs a pressure-balanced structure. The valve's flow characteristics are determined by the curved profile of the valve cage window. Additionally, a guide vane is incorporated to enhance smooth fluid flow around the sleeve. Consequently, this valve offers low pressure drop, high flow capacity, and low noise.