NFPA Reciprocating Compressors The quadruplex modular stacking configuration consists of two compressors mounted on top of one another on both sides of the receiver tank. This modular or field separable design allows for ease of shipment and handling on site. General Features V-belt driven Oil-Less Reciprocating compressors, air-cooled construction with absolutely no oil required for operation UL listed control panel in a NEMA 12 enclosure with a 5.7" Touch Screen Display Ethernet connectivity with embedded web-page for remote monitoring, password protected for remote adjustment of all operating parameters Inside of the receiver consists of a two-part epoxy coating providing rust protection equal or better than that achieved by galvanizing