What is the difference between the Model A-2 and Model B-1 Pressure Maintenance Devices?
The Model B-1 Pressure Maintenance Device is used where a small tankless air compressor with no start/stop pressure switch is provided. By wiring the compressor motor to the electrical pressure switch of the Reliable Model B-1 Pressure Maintenance Device, the compressor is controlled by the pressure in the dry pipe valve or deluge dry pilot system. The adjustable pressure range for the Model B-1 is 14 to 60 psi. The Model A-2 Pressure Maintenance Device is designed for use where a controlled source of compressed air or nitrogen is available, such as compressors and tank-mounted compressors that have their own start/stop pressure switch. The Model A-2 will maintain a constant pressure in the system regardless of pressure fluctuations in the compressed air or nitrogen source. The adjustable pressure range for the Model A-2 is 5 to 50 psi.
