1、先导气全封闭内排式，适用于超净环境，也可防止外办粉尘封闭内部污染；
2、线畔功耗低，AC型为2VA、DC型为1W；
3、反应速度快、作动灵敏、长时间工作，换向性能稳定；
4、内部与外部先导方式可选；
SDA50*30-B –N SDA50*35-B –N SDA50*40-B –N SDA50*45-B –N SDA50*50-B –N SDA50*55-B –N SDA50*60-B –N SDA50*70-B –N SDA50*75-B –N SDA50*80-B –N SDA50*90-B –N SDA50*100-B –N ATQ ASQ SDAS63*5-B –N SDAS63*10-B –N SDAS63*15-B –N SDAS63*20-B –N SDAS63*25-B –N SDAS63*30-B –N SDAS63*35-B –N SDAS63*40-B –N SDAS63*45-B –N SDAS63*50-B –N SDAS63*55-B –N SDAS63*60-B –N SDAS63*70-B –N SDAS63*75-B –N SDAS63*80-B –N SDAS63*90-B –N SDAS63*100-B –N ATQ ASQ SDA63*5-B –N SDA63*10-B –N SDA63*15-B –N SDA63*20-B –N SDA63*25-B –N SDA63*30-B –N SDA63*35-B –N SDA63*40-B –N SDA63*45-B –N SDA63*55-B –N SDA63*60-B –N SDA63*70-B –N SDA63*75-B –N SDA63*80-B –N SDA63*90-B –N SDA50*30-B –N SDA50*35-B –N SDA50*40-B –N SDA50*45-B –N SDA50*50-B –N SDA50*55-B –N SDA50*60-B –N SDA50*70-B –N SDA50*75-B –N SDA50*80-B –N SDA50*90-B –N SDA50*100-B –N ATQ ASQ SDAS63*5-B –N SDAS63*10-B –N SDAS63*15-B –N SDAS63*20-B –N SDAS63*25-B –N SDAS63*30-B –N SDAS63*35-B –N SDAS63*40-B –N SDAS63*45-B –N SDAS63*50-B –N SDAS63*55-B –N SDAS63*60-B –N SDAS63*70-B –N SDAS63*75-B –N SDAS63*80-B –N SDAS63*90-B –N SDAS63*100-B –N ATQ ASQ SDA63*5-B –N SDA63*10-B –N SDA63*15-B –N SDA63*20-B –N SDA63*25-B –N SDA63*30-B –N SDA63*35-B –N SDA63*40-B –N SDA63*45-B –N SDA63*55-B –N SDA63*60-B –N SDA63*70-B –N SDA63*75-B –N SDA63*80-B –N SDA63*90-B –N 5、线圈（先导阀）与阀体可灵活、多方向安装；