for an uninterrupted gas supply from liquid gas tank and single cylinders or cylinder racks
reduces the pressure of the various gas sources to the required pipeline pressure the electronic control monitors the gas pressure and, if necessary, switches between the gas sources forwarding of the alarm to secondary warning device by potential-free contacts or bus system feed for manually connectable emergency supply very easy to service due to the in-built shut-off and non-return valves
The change-over unit ensures the continuous supply of the gas network with medical gases from three independent sources of supply, i.e. from liquid gas tank and on both sides from individual cylinders, cylinder racks or batteries. The change-over unit which operates with an electronic control, regulates the supply of the gas supply system and reduces the pressure of the liquid gas tank and of the individual cylinders and/or cylinder batteries to the required network pressure. The change-over unit has a safety valve and an inlet for an emergency supply. Upon request, the change-over unit is also available with only two supply sources (i.e. without liquid gas tank infeed).
The pneumatic part and the electronic control of the change-over unit are mounted in a lockable switch cabinet. The operating conditions and the prevalent pressures are shown on the display of the closed cabinet. The messages of the operating status can be forwarded via potential-free contacts to a control centre.
The pressure is regulated in two stages. The two low-pressure regulators are connected in parallel, i.e. one acts as a reserve.