1 valve body (including variable speed transmission box) inside and outside, the first shot blasting sand rust, and strive to electrostatic spray powder non-toxic epoxy resin, the thickness of 0.3mm or more. Extra-large valve electrostatic spraying non-toxic epoxy resin difficulties, should also be brushing, spraying similar non-toxic epoxy paint. 2 The internal parts of the valve body as well as all parts of the valve plate are required to be fully anticorrosive. On the one hand, immersion in water does not cause corrosion and electrochemical corrosion does not occur between the two metals; on the other hand, the smoothness of the surface reduces the resistance to over-water flow. 3 valve body anti-corrosion epoxy resin or paint the health requirements, there should be the corresponding authority of the test report. Chemical and physical properties should also meet the relevant requirements. Pneumatic valve packaging and transportation 1 should be set on both sides of the light blocking plate solid seal. 2, small-caliber valves should be tied with straw, and transported by container mode is appropriate. 3 large diameter valve also has simple wooden frame solid packaging, in order to avoid collision damage during transport. Pneumatic valve factory manual Pneumatic valve is equipment, the factory manual should be marked with the following relevant data: Valve Specifications; Model; Working pressure; Manufacturing standards; Body material; Stem material; Sealing material; Stem packing material; Stem Shaft Set of materials; inside and outside anti-corrosion materials; Start the direction of operation; Revolutions; Opening and closing torque under conditions of work pressure; Factory name; Date of manufacture; Factory number; Weight; Diagram shows the overall length, width and height control dimensions; valve flow resistance coefficient; the number of effective opening and closing; the valve factory inspection of the relevant data and installation, maintenance precautions and so on.