Bullard Free-Air Pump transfers the ambient air from a breathable air source to a supplied-air respirator. Pump includes inlet as well as carbofine outlet filter that is used to purify the ambient air and is ideal for 2 continuous-flow supplied-air half- or full-face mask respirators, 1 continuous-flow supplied-air hood or helmet respirator. It includes an open drip-proof motor that is suitable for clean, dry areas. It supports airflow of 10 CFM at 5 psig and is easy to operate as well as to maintain. It meets the requirement of NIOSH standards.