Fairly good results have been obtained by using optimum parameters for surface strengthening and anti corrosion treatment of valve plate.
用优选的工艺参数对阀片进行表面强化与防蚀处理，获得了较好的效果。
As the largest steel spring material such as stainless steel anti-corrosion materials can not be produced, poor corrosion products, the life of the valve is not long.
由于弹簧材料钢性大不能用不锈钢球阀等防腐材料制作，产品防腐能力差，阀门的使用寿命不长。
About the control valve, apart from the anti-corrosion materials, how to choose the correct construction to suit the producing environment is a real problem, this paper can tell you the answer.
对于调节阀，除防腐蚀材料的选取外，怎样选择正确的结构来适应生产环境的要求是一个值得关注的问题。
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