描述
回路的控制器的制作成本太高,价格/性能比不好。后来为了减低成本,就有两回路的、四回路的控制器,它的价格/性能比稍好一些。对于一个大中型系统来说,DCS的价格/性能比比回路控制器组成的系统要好。有些特殊地方还是要用到一些回路控制器。
TURBOMOLECULAR PUMP ALCATEL 5402 CP – REFURBISHED
GOULDS MODEL 3405 SIZE 6″ X 8″ CENTRIFUGAL PUMP 30 HP
Enlarge
UNUSED Graham 2V5216 Stainless Liquid Ring Vacuum Pump
Ebara 50X20 Dry Vacuum Pump – AS IS
Ebara A150W-M Dry Vacuum Pump – AS IS
Kinney Vacuum Pump KMBD 1600
Ebara A07V Refurbished
Alcatel RSV1002 Booster Pump – Used
Edwards EXT250 Turbomolecular Vacuum Pump 220.0 LPS