Duct Velocity Control for Extract Fans – ‘DELTA-P’

Extract fans are in common use to remove harmful dust and fumes or transport material within factories. Whatever their use, they rely on duct air velocity to ensure the material is kept in the airflow and does not settle out and cause a blockage. An Irishman, Sir George Stokes first developed a theorem that related fluid velocity to the force applied to an object within the fluid, now commonly known as Stokes’s Law. In simple…