一、引言热双金属式疏水阀能有效地阻汽排水,比我们目前使用的热动力式疏水阀节约蒸汽15～25%,使用寿命长,并且无工作噪声和蒸汽弥漫等缺点。阜宁阀门厂曾试用国产5J18热双金属制造热双金属式疏水阀,锈蚀得很快,并出现裂纹,使用时间只有数月,甚至不到一个月。上海钢铁研究所研制的RSN210不锈热双金属,现场使用二年后,表面光滑而不 I. INTRODUCTION Thermal bimetallic steam traps can effectively block steam drainage and save 15-25% more steam than the thermodynamic steam traps we currently use. They have long service life, and are free of operating noise and steam diffuse. Funing valve factory has tried domestic hot metal bimetal 5J18 thermal double metal trap, rust quickly, and cracks, the use of time only a few months, or even less than a month. Shanghai Iron and Steel Institute developed RSN210 stainless steel hot bimetallic, after two years of field use, the surface is smooth and not