Large Presses: The Johnson-Progress range of large filter presses have plate pack sizes 800, 915, 1000, 1200, 1300, 1500 and 1500/2000.
All plate sizes are available for use in sidebar or overhead slung plate suspension designs with the exception of the 800mm square plate size which is only available in sidebar framework and the 915mm square plate size is only available in the overhead slung framework.
The need to reduce manpower on process plants and to ease the nature of work involved, has called for mechanisation to automate the operational sequence of filter presses fitted with these larger plate sizes. Both overhead slung and sidebar filter presses can be fully mechanised which provides automatic means of closing the plates together, sealing the filter press at a pre-determined pressure, moving each plate individually to afford cake discharge, controlling the movement to minimise filter cloth wear due to impact and providing a safety system whereby electric power is cut off if the operator approaches the filter press while the plate transfer mechanisation or the closing mechanisation is in operation. The development of mechanisation makes one man filter press operation possible whilst maintaining good operational efficiency.
