pneumatic tank valve applies integrated direct flow structure. Its valve body has streamlined configuration without any blocking flow channel. The flow channel internal face is sand-blasted, smooth and wearing-proof, with small flow resistance and with no dead corner. The soft sealing could ensure zero leakage and the hard sealing applies bead-welded Stellite alloy. The product is suitable for work conditions with high temperature or severe conditions containing solid particles. For food processing, the internal face is paved with Teflon without superior corrosive resistance. It meets highest sanitary standards, applicable for conditions with rigorous sanitary regulations in food and beverage industry.