Single-screw pump features Single-screw pump due to structural and working characteristics, compared with the piston pump centrifugal pump, vane pump, gear pump has many advantages compared to the following: 1, can transport high solids content of the medium; 2, uniform flow rate pressure stability, low Speed ​​is more obvious; 3, the flow rate is proportional to the pump speed, which has good variable regulation; 4, a pump can be used to transport different viscosity media; 5, the pump installation position can be any tilt; 6, Sensitive items and susceptible to damage by centrifugal force and other items; 7, small size, light weight, low noise, simple structure, easy maintenance. The selection of single-screw pump Selection of pump specifications is based on the nature of liquid being transported and flow, pressure to determine, and the pump speed by the viscosity and corrosive liquid delivery, as the main parameters to choose, in order to ensure reliable operation of the pump. Pump design speed for the transmission of water or water similar non-corrosive liquids allow the maximum speed, in actual use due to the nature of the media and life requirements are different, the selection should generally be lower than the design speed. For high viscosity and medium containing particles, the design speed of 1 / 2-1 / 3 or lower is generally used. Low speed is good for pump wear. However, the wear rate of the stator decreases after use. At this time, the speed can be properly increased , To compensate for the decline in traffic is also a policy. Transmission medium temperature should be -10 ℃ ~ 80 ℃ in special cases up to 120 ℃. The normal pressure of each stage of the pump (one lead of the stator) is 0.6 Mpa, allowing up to 0.8 Mpa in a short period of time (less than 30 minutes), and gradually decreasing the volumetric efficiency at the same output pressure when worn. Pumping water maximum suction is 8 meters, the actual use of recommendations not exceeding 6.5 meters, when pumping high-viscosity media, should be positive pressure inhalation.