Horizontal Screw Conveyor can feed via tubular screw, which forms stock volume by pushing forward the bulk material in the shell of pipe and prevent air channeling. Shiftless screw structure can be used for clammy and easy-winding material.Tubular screw conveyor even discharging and convenient to control the feeding;The construction is firm, compact and beautiful in design;Wide material can be selected: stainless steel ( SS304, SS304L, SS316, SS316L), carbon steel and etc.Pipe screw conveyor system can be used in the pneumatic handling system, also can be used in the ordinary discharging condition of pressure difference with the feature of good sealability and high pressure resistance. Not only can be used in the low pressure dilute phase pneumatic conveying system, but also used in the high pressure dense phase pneumatic conveying system;