The water and powder mixer is composed of main machine boby and centrifgal pump water wheel, which are vertically installed. Through a double-layer wall pipe,the liquid materials and solid materials are separately pumped in, which can prevent them form agglomerating before entering into the main body. When the liquid enters into the main machine body of mixer at high speed, vacuum will produce in the center of water wheel to suck the solid materials. The soild materials will be evenly sucked in through the regulation of valve under the hopper. It has brief design and multiple functions. lt can rapidly and evenly mix multiple solid materials without contacting the air. The mixing is enough and the product can be recycled. Under some conditions,use"online" and there is no need for recycling. Sanitary design and clamp connection with convenient assembly and disassembly.No need to dismantle any device during the cleaning and disinfecting. Mechanically close the valve to keep the inside sanitation. 40°standard hopper. Specially designed for manufacturers of dairy products and beverages, the equipment can be used to mix solid materials and liquid materials in the production of syrup,sorbitol,glucose,lactose and its side products, in the reduction of milk powder, in the solving into milk with cocoa powder or white sugar, in the solving of whey powder, in the solving into water wtih flour and starch, in the production of salt water and in the preliminary mixing of yoghurt and other dairy products.