Oil Dry Screw vacuum screw pump 

Overview Vacuum Equipment Liquid Vacuum Pump VDP-type Variable-Pitch Screw vacuum pump is composed of a pair of variable pitch screw rotors which meshes in the opposite and synchronous way in the pump casing to complete the intake and exhaust cycle. Variable-Pitch Screw vacuum pump compresses Two Stage Water Ring Vacuum Pump the medium more efficiently with energy saving and lower temperature than constant pitch screw vacuum pump. Without any lubricants in the housing, it is perfect for medium recycling and environmental protection, which is the best upgrading products for oil-sealed, steam-jet and liquid ring pumps. The variable pitch screw rotor can be customized and manufactured in order to best fit for clients' requirements. Specifications Main Characteristics • Higher pumping efficiency and lower energy consumption compared with constant pitch screw pump      • Wide pumping rate range with direc…