Auto Change Over Systems are designed to eliminate the necessary shutdown of Gas Systems or Processes while replacing empty gas cylinders." " Auto Change Over System uses " " Gas Regulators on each side of the cylinder line and discharge line. The two regulators on two lines of gas cylinders are set at slightly different delivery pressures for automatic disconnection of one side of the cylinder line and automatic opening of the other side of the cylinder line. The regulator on discharge line ensures constant delivery pressure to the systems under use or application areas.Superior Quality : Each " " Auto Change Over System is made to exacting quality standards, undergoes 100% inspection and individual leak testing. This unwavering attention is to ensure the best cycle life and superior performance from every " " Auto Change Over System." " Auto Change Over Systems are designed to be compatible to most other " " Safety & Gas Products.Superior Performance : Your selection of a " " Auto Change Over System guarantees you the very best in quality, durability and safety to go along with pricing that are competitive.>> Features :Leak Tight Integrity No gas contamination Useful for all fluids. Precise pressure control