諾冠常用氣缸型號閥芯位置不需電來保持。它的優點在于節約能源尤其是用電池作電源的場合，而且可不考慮溫升，從而線圈壽命長，在高低溫、防爆等場合有較高安全性。常見的有機械式保持和永磁體保持，又分雙線圈和單線圈，以單線圈磁保持結構zui為簡單。它是以改變直流電源極性改變對應閥門開關的兩種狀態。這種電磁閥單獨安裝線圈外部接線需加轉換開關，而與智能儀表配套則十分方便。IC卡預收費煤氣表和水表所配的電磁閥是儀表成敗的關鍵之一，其中的自保持技術又是電磁閥的成敗的重要因素，國內的自保持電磁已日趨成熟。

    諾冠常用氣缸型號主閥芯或鐵動芯的密封件已損壞→更換密封件
　　流體溫度、粘度是否過高→更換對口的電磁閥
　　有雜質進入電磁閥產閥芯或動鐵芯→進行清洗
　　彈簧壽命已到或變形→更換
　　節流孔平衡孔堵塞→及時清洗
　　工作頻率太高或壽命已到→改選產品或更新產品
　　3、其它情況
　　內泄漏→檢查密封件是否損壞，彈簧是否裝配不良
　　外泄漏→連接處松動或密封件已壞→緊螺絲或更換密封件
　　通電時有噪聲→頭子上堅固件松動，擰緊。電壓波動不在允許范圍內，調整好電壓。鐵芯吸合面雜質或不平，及時清洗或更換。

Norgren諾冠氣缸PCA/182063/M/125              PRA/182063/M/185              PRA/182063/1300
Norgren諾冠氣缸PRA/182063/420           PRA/182063/M/260              PRA/182063/M/1280
Norgren諾冠氣缸PRA/182063/160           PRA/182063/1250                PRA/182063/W2/100
Norgren諾冠氣缸PRA/182063/25             PRA/182063/MG/185           PRA/182063/M/85
Norgren諾冠氣缸PRA/182063/M/65         PRA/182063/950                  PRA/182063/920
Norgren諾冠氣缸PRA/182063/M/850              PRA/182063/M/700             PRA/182063/M/500
Norgren諾冠氣缸PRA/282063/MIA/A2/500     PRA/182063/40     PRA/182063/MT/100/100
Norgren諾冠氣缸PRA/182063/M/660              PRA/182063/M/360              PRA/182063/M/40
Norgren諾冠氣缸PRA/182063/W2/160     PRA/182063/JM/200            PCA/182063/M/20
Norgren諾冠氣缸PRA/182063/JM/160      PRA/182063/M/370              PRA/182063/X2/50
Norgren諾冠氣缸PCA/182063/M/70         PRA/182063/M/750              PRA/182063/M/90
Norgren諾冠氣缸PRA/182063/M/1100      PRA/182063/X1/125            PRA/182063/1400
Norgren諾冠氣缸 PRA/182063/L4/50        PRA/182063/150/F        PRA/182063/125/D/UF
Norgren諾冠氣缸PRA/182063/300           PRA/182063/200                  PRA/182063/M/50
Norgren諾冠氣缸PRA/182063/M/180              PRA/182063/80                  PRA/182063/125
Norgren諾冠氣缸PRA/182063/110            PRA/182063/M/80               PRA/182063/M/320
Norgren諾冠氣缸PRA/182063/M/350              PRA/182063/M/250              PRA/182063/150
Norgren諾冠氣缸PRA/182063/100           PRA/182063/170/D/F           PRA/182063/50
Norgren諾冠氣缸PRA/182063/1150          PRA/182063/250                  PRA/182063/M/770
Norgren諾冠氣缸PRA/182063/M/400              TPRA/182063/M/50             PRA/182063/320
Norgren諾冠氣缸PRA/182063/M/550              PRA/182063/M/650             PRA/182063/M/125
Norgren諾冠氣缸PRA/182063/J/75           PRA/182063/MG/100           PRA/182063/M/25
Norgren諾冠氣缸PRA/182063/75             PRA/182063/M/100/UL/M    PRA/182063/80/F/D
Norgren諾冠氣缸PRA/182063/M/200              PRA/182063/L4/200             PRA/182063/J/50
Norgren諾冠氣缸PRA/182063/M/150              PRA/182063/X2/320            PRA/182063/M/140
Norgren諾冠氣缸PRA/182063/L4/450              PRA/182063/100/D             PRA/182063/M/210
Norgren諾冠氣缸PRA/182063/M/920              PRA/182063/M/600             PRA/182063/1500/B
Norgren諾冠氣缸TPRA/182063/1400        PRA/182063/M/95               PRA/182063/170
Norgren諾冠氣缸PRA/182063/1200/C      PRA/182063/150/UR/UF      PRA/182063/M/800
Norgren諾冠氣缸PRA/182063/M/1150      PRA/182063/M/1200/C/F      PRA/182063/X2/400
Norgren諾冠氣缸PRA/182063/X2/400/UF/L     PRA/182063/650           PCA/182063/M/200

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