Bird model 2500, 18″ x 54″ decanter centrifuge Bird 18″ x 54″ decanter centrifuge. Bird model code 2500-C (manufactured in Canada at Andritz-Bird’s Saskatoon plant location). 316 stainless steel product contact parts. PA69H gearbox, 140/1 ratio. Max. bowl speed: 3,500 RPM.