2.1 standard quality pneumatic valve pneumatic valve body material should be ductile iron, cast steel Z641F pneumatic valve vendors, stainless steel, 316L-based, and indicate the grade and cast actual physical and chemical test data. 2.2 stem material, and strive to stainless steel stem (2CR13), large diameter valves should also be embedded in the package of stainless steel stem. 2.3 nut material, cast brass or aluminum bronze, and the hardness and strength are greater than the stem. 2.4 Weifang valve stem bushing material, its hardness and strength shall be not greater than the stem, and is immersed in water conditions and valve body is not the formation of electrochemical corrosion. Both sides of the valve pneumatic valve packing and shipping should be located light blocking plate solid seal. Medium and small-caliber valve should be tied to rope Shandong valve, and transported to suitable container. Large diameter valves are also simple wood frame solid packaging to avoid collision damage during transport. Valve Co., Ltd. Shandong Everbright valve manufacturer specializing in the production, welcome new and old customers to order our products! Z641F pneumatic valve supplier, pneumatic valve, valve type Everbright Everbright Limited provided by Shandong valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) strong, credible, Shandong Weifang ball industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Everbright valve into the brilliant and you work for a better future!