Air Maintenance Devices
When NFPA Code requires an Air Maintenance Device in a dry pipe system, General Air Products UL/FM Approved Air Maintenance Devices are designed to control the amount of air fed into the dry pipe system so that the volume of air available while maintaining the system pressure does not effect the ability of the water to move through the piping system.
Model AMD-1 Air Maintenance Device
Model AMD-1 Air Maintenance Device is used when compressed air is supplied through an existing factory air supply, when using tank mounted fire protection air compressors or larger riser mounted type air compressors. Note: The AMD-1 is rated for 175 PSI
Model AMD-2 Air Maintenance Device (with Pressure Switch)
Model AMD-2 Air Maintenance Device is used for automatic operation in conjunction with a dedicated fire protection air compressor that does not have a pressure switch installed, such as our L Series base mounted lubricated units. Note: The AMD-2 is rated for 175 PSI
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