Centrifuge tubes are used in laboratory centrifuges, machines that spin samples in order to separate solids out of liquid chemical solutions. The centrifuge tubes can be made of glass or plastic, and resemble miniature test tubes with tapered tips. They are mainly used in series test like the centrifuge of nucleic acid
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Pump classification knowledge
According to the principle of work points: 1. Positive displacement pump working parts by the movement caused by the work of the cyclical increase and decrease of the volume of suction liquid, and by the working parts of the extrusion pressure directly to the liquid can increase. According to the movement of different parts of the movement is divided into: reciprocating pump and rotary pump two types. According to different moving parts structure, there are: piston pump and piston pump; gear pump, screw pump, vane pump and water ring pump. 2. Impeller pump impeller pump is driven by the impeller liquid high-speed rotation of the mechanical energy transfer to the liquid delivered. According to the characteristics of the pump impeller and the structure of the flow channel can be divided into: 1) centrifugal pump 2) axial flow pump 3) mixed flow pump 4) vortex pump. 3. Jet pump is generated by the working fluid jet jet fluid at high speed, and then through the exchange of momentum and the fluid is injected to increase the energy. 4. Other pump classification Pump can also be divided according to the position of the pump shaft: 1) vertical pump 2) Horizontal pump according to the number of suction is divided into: 1) single suction pump (double suction pump) 2) double suction pump According to the prime mover of driving pump, 1) Electric pump 2) Turbine pump 3) Diesel pump