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One , 3G three screw ship characteristics:
   Marine 3G three screw including 3G Universal , 3GC ship type and special type . 3G three screw rotor positive displacement pump , because the active screw with driven screw intermeshing spiral groove and three holes with them and bushing surface , forming a number of class action to be sealed in the chamber between the inlet and outlet , the dynamic seal chamber will keep the liquid from the pump inlet to pump outlet axial movement , step by step and to boost the body fluids , thereby forming a continuous, smooth , axial movement of the pressure fluid.
Two , 3G marine and three screw for medium performance range :
   3G three screw the body fluids for a variety of solid particles, lubricating oils and similar non-corrosive liquid oil , the viscosity of infusion 1.2 ~ 100 ° E (3.0 ~ 760cst), high-viscosity liquids can also be passed delivery viscosity after heating .
   Flow range 0.2 ~ 590m3 / h, maximum working pressure of 100bar, the maximum temperature of 150 ℃.
Three , 3G three screw marine structures :
   1 , marine screw structure is simple : with a variety of structural forms , generally small flow 0.2 ~ 6.5m3 / h, marine screw the pump and bushings into one ( collectively pump ) , shaft seal is a mechanical seal .
   Moderate traffic over a separate pump liner is secured to the pump body parts , high flow pump more than double suction structure made of horizontal installation , seal sealing two mechanical seals and packing , depending on the transmission medium .
   Marine screw installation in the form of 3G has both horizontal and vertical , the original motivation for the AC and DC marine motors.
   Three screw long life 2,3 G Marine : 3G three screw initiative screw driven by a motor , Lord, from no mechanical contact between the rods , and the output from the pressure of the liquid from the rotation axis of the rod driven around , Lord, from pole between , between the screw and the bushing Individually layer of film to protect , and thus minimal mechanical friction pump life called semi-permanent .
   3 , the infusion of marine screw in the pump body axially uniform linear motion , so the pressure pulsation , flow stability , low noise , due to the inertia of the rotating parts small , the starting torque and low vibration .
   4,3 G Marine three screw with a high suction capacity .
   5 , the vessel used to ensure the security screw pumps, motors and piping systems , both medium flow over the screw with a safety valve when the pressure exceeds the set pressure of the safety valve , pressure oil to flow back to the pump inlet mouth .