XPS screen changer is composed of screen changer main body, slide plate, high temperature oil cylinder, heater, etc. The screen changer is specially designed for filling butane, CFC, carbon dioxide and other gas products which are easy to produce fried material, air leakage, rubber leakage, etc. The sealing parts are made of special alloy steel, which is specially processed by many processes such as tempering, nitriding, fine grinding, etc. The one-piece structure can avoid fried material, mater