The class 9 was a 4-6-2 “Pacific” designed by P.A. Hyde as the lighter sister of the class 10. It was inspired by Beattie's class 8 4-8-0 and also had bar frames. Only five were built by Vulcan Foundry in 1904 and numbered 600 to 604. Their drivers measured 57 inches and their cylinders were 18 inches in diameter and 26 inches in stroke.
The boilers were saturated and had a narrow round-topped firebox. Eight class F 4-6-4T tank locomotives for suburban service were also derived from the class 9. After the founding of the South African Railways, the class 9 was numbered 727 to 731. They were not only used for lighter express trains, but also for mail service between Johannesburg and the Natal border. The last one was withdrawn by 1926, only 22 years after their construction.