1, the electrochemical corrosion. Stainless steel valve surface accumulating the attachments contain other metal elements or heterogeneous metal dust particles, valves, in the humid air, condensate and stainless steel fixtures between the two together into a micro-cell, Shanghai and Shanghai Valve Manufacturing Limited, causing the electrochemical reaction, the protective film damage. 2, stainless steel valve surface adhesion organic juice, Guangzhou Kaiheng Valve Co., Ltd., in the case of water oxygen to form organic acids, acids long is the corrosion of the metal surface. 3, stainless steel valve surface adhesion containing acid, alkali, salts, can cause localized corrosion. 4, in the air pollution (such as those containing sulfides, carbon dioxide, nitrogen oxide atmosphere), the case of condensed water to form sulfuric acid, nitric acid, acetic acid solution point, causing chemical corrosion. Above may cause damage to the stainless steel surface protection film cause rust. By drive points: (1) manual valve: by human handwheel, handle, lever, sprocket drive valve. When the valve opening and closing torque is large, you can set or worm gear reducer between the handwheel and valve stem. When necessary, it can also be remotely operated or drive shaft universal joints. (2) power driven valve: use of various energy sources to drive, including: electric valves, pneumatic valves, hydraulic valves, solenoid valves, the gas-liquid interlocking the like. (3) automatic valve: automatic valve driving force is not required, but the use of the medium itself energy to actuate the valve. Ningbo Ai Ke Valve Co., valves, valve out of Hong Kong, the Hong Kong valve provided by the Dongguan Science and Technology Co., Ltd. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!