FTI / Finish Thompson TB Series Drum Pumps - Mid-Performance Sealed, lightweight Economy Drum Pump. TBS: Flammables, mild corrosives & chemicals, max temp 150˚F (66˚C). TBP: Corrosive fluids (bleach, nitric acid, HCl, etc.), max temp 150˚F (66˚C). Lightweight pumps suitable for low to medium viscosity mild corrosives, solvents, and chemicals. Up to 200 cP, Interchangeable with motors, Pump tube designed to fit smaller bung openings and Variable orifice discharge offers greater flow control.