The sanitary self-priming pump is specially designed to handle the suction material whose liquid level is lower than the pump inlet and the conveying of fluid material containing a part of the gas. Its self-priming pump casing, pump cover and impeller are all made of high-quality stainless steel 304 or 316L. The motor comes with a stainless steel shroud. The inner surface mirror polishing roughness Ra0.28um. The outer cover is brushed and matt. Fully comply with GMP requirements.