Category: Gauges - Regulators Subcategory: Regulators

Airgas Automatic Changeover Module. P/N E13-CP145DLP

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Product Details

The Airgas Automatic Changeover Module. P/N E13-CP145DLP is a 2 cylinder high purity stainless steel automatic changeover system for liquid cylinder gas service with 150 PSI fixed delivery pressure, CGA-580. This high-purity brass, or stainless steel automatic changeover panel provides continuous, uninterrupted gas supply on installations where a reserve cylinder is used. The unit consists of two identical regulators, one delivering gas at a slightly higher pressure than its twin. When the service cylinder is empty, the unit will automatically withdraw gas from the reserve cylinder, thus eliminating the need to shut down the system to replace empty cylinders. The pressure gauges immediately indicate which cylinder is in use. The high-purity design and materials of construction make this system ideally suited for chromatography and laboratory gas applications. This system includes purge valves, affording the opportunity to eliminate atmospheric contamination that occurs during cylinder change outs.


  • Check valve in inlets: keeps air from entering during cylinder change-out 
  • Stainless steel diaphragm; appropriate for most applications
  • Diaphragm packless purge valves; higher leak integrity than needle valve
  • Shut-off valve at unit outlet; keeps air from entering during change-out of downstream components

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