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；5、线圈（先导阀）与阀体可灵活、多方向安装；6、底座与4V系列通用PB4*50-S-UPB4*60-S-UPB4*75-S-UPB4*80-S-UPB4*100-S-UPB4*125-S-UPB4*150-S-UPB4*160-S-UPB4*175-S-UPB4*200-S-UPB4*250-S-UPB4*300-S-UPTBPSBPB4*5-S-RPB4*10-S-RPB4*15-S-RPB4*20-S-RPB4*25-S-RPB4*30-S-RPB4*40-S-RPB4*50-S-RPB4*60-S-RPB4*75-S-RPB4*80-S-RPB4*100-S-RPB4*125-S-RPB4*150-S-RPB4*160-S-RPB4*175-S-RPB4*200-S-RPB4*250-S-RPB4*300-S-RPTBPSBPB4*5-S-CBPB4*10-S-CBPB4*15-S-CBPB4*20-S-CBPB4*25-S-CBPB4*30-S-CBPB4*40-S-CBPB4*50-S-CBPB4*60-S-CBPB4*75-S-CBPB4*80-S-CBPB4*100-S-CBPB4*125-S-CBPB4*150-S-CBPB4*160-S-CBPB4*175-S-CBPB4*200-S-CBPB4*250-S-CBPB4*300-S-CBPB6*5-S-UPB6*10-S-UPB6*15-S-UPB6*20-S-UPB6*25-S-UPB6*30-S-UPB6*60-S-UPB6*50-S-UPB6*60-S-UPB6*75-S-UPB6*80-S-UPB6*100-S-UPB6*125-S-UPB6*150-S-UPB6*160-S-UPB6*175-S-UPB6*200-S-UPB6*250-S-UPB6*300-S-UPTBPSBPB6*5-S-RPB6*10-S-RPB6*15-S-RPB6*20-S-RPB6*25-S-RPB6*30-S-RPB6*60-S-RPB6*50-S-RPB6*60-S-RPB6*75-S-RPB6*80-S-RPB6*100-S-RPB6*125-S-RPB6*150-S-RPB6*160-S-RPB6*175-S-RPB6*200-S-RPB6*250-S-RPB6*300-S-RPTBPSBPB6*5-S-CBPB6*10-S-CBPB6*15-S-CBPB6*20-S-CBPB6*25-S-CBPB6*30-S-CB)