JB Industries DV-142N-250 Vacuum Pump Platinum Series is designed with stainless steel valving to help prevent corrosion in addition to innovative aluminum fins to help reduce pump heat. The JB Industries DV-142N-250 features a gas ballast to pump water vapor into the atmosphere instead of letting it accumulate in the oil reservoir, 2-stage pump design to help pull a deep 15 micron vacuum, built-in check valve to prevent oil from flowing back into the system in the event of a power loss, 5 CFM, and more.