Sullivan-Palatek / Boss D185PDZSB is a portable air compressor used for construction, utility, and industrial compressed air applications. The D185PDZSB designation identifies a diesel-powered unit in the 185 cfm class, commonly configured for jobsite air supply, pneumatic tools, and service operations. Sullivan-Palatek and Boss-branded compressors are known for towable, rugged package designs with enclosed components, service access, and field-oriented durability. This model is typically associated with portable compressor systems built for reliable airflow, mobility, and operation in demanding environments. For equipment databases, it should be indexed under air compressors, portable compressors, and diesel towable compressor categories.