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Three screw rods pump including 3G general, 3GCship with and special, three screw rods pump are transfer the minor volume to pump, because on the driving screw rod and the driven screw rod the spiral groove meshes mutually and they with the bushing three internal surfaces coordinations, can in between the import and export which pumps form the number level to move the sealed chamber room, these will move the sealed chamber unceasingly from to pump the liquid the import end motion to pump the exportation, and will cause to.lose the liquid by the promotion pressure, thus wil form, is continuously steady, the end motion pressure liquid. |