At present, the valve manufacturing industry is in a very favorable period of development. This is mainly due to the sustained and steady development of the national economy and the gradual expansion of investment in fixed assets. Domestic high-end valve products are still heavily dependent on imports, while domestic valves are mostly low value-added, labor-intensive products, rarely have the international advanced level. According to the relevant department statistics, China's annual turnover of the valve market up to 50 billion yuan, of which more than 100 billion market has been occupied by foreign valve companies.
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 above. Extra-large valve electrostatic spraying non-toxic epoxy resin difficulties, should also be brushing, spraying similar non-toxic epoxy paint.
All parts of the valve body as well as the valve plate requires full corrosion protection. On the one hand, it will not be eroded when immersed in water. Electrochemical corrosion will not occur between the two metals; on the other hand, the smoothness of the surface will reduce the over-water resistance.
The body of the 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.
Valve should be set on both sides of light blocking plate solid seal.
Medium and small-diameter valves should be tied with straw, and transported by container is appropriate.
Large-caliber valves also have simple wooden frame solid packaging, to avoid collision damage during transportation.
Valve factory manual 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 sleeve material ; Inside and outside the anti-corrosion material; the direction of operation start; revolutions; opening and closing torque under pressure conditions; factory name; date of manufacture; factory number; weight; connecting flange aperture, the number of holes, Way to indicate the overall length, width and height control dimensions; valve flow resistance coefficient; effective opening and closing times; valve factory inspection of the relevant data and installation, maintenance precautions and so on.
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