A professional who tends vacuum or pressure tank that impregnates powdered-metal parts with lubricating oil or molten plastic. Respnsibilities include:

• Pours impregnating material into tank.
• Sets controls of heating unit to attain specified temperature of solution.
• Places containers of parts in tank and closes cover.
• Observes gauge and turns valves to attain specified pressure or vacuum in tank.
• Closes valves after specified time, and removes finished parts from tank.