DraftMax Advance Spare Parts FAQs
Straight answers to the questions people ask most when looking for spare parts for a downdraft extraction table.
What is a downdraft table and how does it work?
A downdraft table is a work surface with a perforated or slotted top, with a fan that draws air down through it. Fume and dust from welding, grinding or cutting on the table are pulled downward and away from the operator's breathing zone, then passed through a filter.
This suits work that can be placed on the table, and the spare parts here are the controls, valves, fan and electrical parts that keep it running.
The table will not start. What should I check?
Check the supply and the main switch first, then the fuses, overload relay, safety switches and the start and stop buttons. If the table has a compressed air supply for cleaning, check that it is connected and that any air presence switch is working.
A tripped overload relay can mean a blocked filter or a motor fault. Electrical checks must be done by a competent person with the supply isolated.
Why is extraction weak?
The commonest cause is a blocked or full filter. Others include a fan running backwards on a three-phase table, a worn or damaged fan wheel, leaks in the ducting or door seals, and a cleaning system that has stopped working.
Check the filter condition and the indicator first. If the fan wheel is damaged or loose, stop using the table until it is repaired.
How does the filter cleaning system work and what can go wrong?
Many extraction tables clean their filters with pulses of compressed air, controlled by valves, a pressure regulator and a control board. If the pressure is wrong, a valve or diaphragm has failed, or the control board is faulty, the filters clog and extraction drops.
The air supply should be clean and dry, and the pressure set as the maker directs. Check the data plate and manual for your own table to see what cleaning system it has and what pressure it needs. Do not alter or bypass any safety device fitted to the air system.