Positive-Pressure Pneumatic Conveying System : A pneumatic conveying system that transports material by utilizing gas at greater than atmospheric pressure
NFPA 654 Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids, 2006 ed. (Std: Prev of Fr and Dust Explo from the Mfg, Procss, and Hndlg of Comb Particulate Solids - Amer) {337 NFC}