Said body is a submersible pump casing diversion, characterized in that the flow guide casing is a casing, a sealed lid, a sealing gland, the back cover, the guide blades, carbide wear-resistant bearing rings and the floating seal, the guide flow within the housing bottom bend after bend and was facing upward slope shrink, and then upward to form a cylinder of small diameter axially inner periphery of the sealing cap flared tube wall, the back cover is a cover and cover center Location set by stainless steel stretching, positioning the back cover jacket features a silicon carbide anti-friction bearings, seal gland sleeve in a sealed cover, the gland on the top surface and an inner seal the gap between the end faces covered There is a floating seal ring gland upper face of the floating seal ring should be stamped with In bump, bump floating seal ring is inconsistent with the gland, has a simple structure, high and low pump, assembly compact, long life and so on.