Flight Line Products, a maker of seats for commercial airplanes, has leased 58,000 square feet in a Valencia industrial building. The company relocated from elsewhere in Valencia to the new space at 28939 N. Avenue Williams. The value and terms of the lease were not disclosed in an announcement released Thursday by NAI Capital, the brokerage that represented the building’s owner, 12800 Wentworth LLC. The move gives Flight Line room to grow. Its previous location at 28732 Witherspoon Parkway had less than 28,000 square feet. “Following a comprehensive search, this building ultimately met all of the functional specifications that the company required in order to grow the business within the Valencia marketplace,” David Young, senior vice president at the Encino office of NAI Capital who represented the landlord, said in a statement. Chad Gahr, senior vice president at NAI Capital, also represented the landlord. Yair Haimoff, senior vice president, represented Flight Line.