Gas panels are used in central gas supply systems for reducing the high primary pressure in the cylinders to more manageable secondary pressures.
Semi-automatic panels handle two cylinders/bundles at a time. When the pressure at one side (the primary side) reaches a pre-set value the manifold “switches” to the other side. This means that it is possible to change the gas cylinders without interrupting the gas flow. After the cylinders at the primary side are changed the handle is turned, thus changing the secondary side (delivering the gas) to the new primary side. It is possible to create a fully automatic manifold, with either electric or pneumatic valves, but since the cylinders have to be changed anyway the cost is rarely justified.
Semi-automatic panels handle two cylinders/bundles at a time. When the pressure at one side (the primary side) reaches a pre-set value the manifold “switches” to the other side. This means that it is possible to change the gas cylinders without interrupting the gas flow. After the cylinders at the primary side are changed the handle is turned, thus changing the secondary side (delivering the gas) to the new primary side. It is possible to create a fully automatic manifold, with either electric or pneumatic valves, but since the cylinders have to be changed anyway the cost is rarely justified.
Pressure decreases in the active cylinder (or bundle) below a present level which causes a semi-automatic switch to switch over to the full cylinder. This is achieved by one integrated double stage pressure regulators (present to slightly different delivery pressure levels), connected at their outlet ports. Moving the lever towards the full bank allows for the disconnection and replacement of empty cylinders without interruption to the gas flow. The use of contact gauge (accessories) in conjunction with alarm box (accessories) facilitates the monitoring of gas reserves. Vent piping for connection to the relief valve.