龙飞机电LONGFEI ELECTROMECHANICAL03 / INDUSTRY INSIGHTS
盐水精制工段氯碱行业解决方案——高致密PFA衬塑阀门，筑牢防腐第一道防线
在氯碱行业离子膜烧碱工艺中，一次盐水和二次盐水精制是整个流程的起点，也是对阀门耐腐蚀性能的首次严峻考验。介质含高浓度氯离子、杂质多、流量大，若阀门内衬致密性不足，极易发生渗透、鼓包甚至泄漏，直接影响后续电解槽运行安全。
Primary and secondary brine purification are the starting points of membrane-cell caustic soda production and the first major test of valve corrosion resistance. High chloride concentrations, impurities and large flow rates can cause permeation, blistering or leakage if valve linings are insufficiently dense, affecting downstream electrolyzer safety.
For this service, Shandong Longfei offers imported valves from two CRANE brands: XOMOX, a pioneer in fluoropolymer lining technology, and Saunders, the inventor of the diaphragm valve. The range includes PFA-lined butterfly, plug, ball and diaphragm valves. The company describes PFA as denser than PTFE, helping block chloride penetration, prevent external leakage and maintain stable long-term operation.
The solution has been applied in major membrane-cell caustic soda projects at Shandong Haili, Befar Group, Jinling Chemical and Yantai Wanhua. Combining international product quality with local service, Longfei provides corrosion protection across the process to support greener, safer and more efficient production.
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