Model HS  -  Hand-operated Screen Changer

            Model SESC  -  Super Economy Screen Changer 

            Model ESC  - Economy Screen Changer     

            Model SC  -  Custom-built Screen Changer

            Model CFSC ‘Contiflow’  -  Continuous Flow Screen Changer   

            Model OSC  -  Oval-Continuous and Discontinuous Flow Screen Changer  

            Model EASC  -  Extended Area Screen Changer