According to our design, the drawing C076A001 rev.1 shows a distance between the burner axis and the column is 635 mm. Seeing the drawing of the burner the distance between the axis and the solenoid is 623 mm, so it should be a gap of 12 mm between the solenoid valves and the column. From the picture you’ve sent, it looks like you didn’t use two profile UPN 160 welded together but has been used bigger columns and so there’s the interference with the valves. We’ve checked both your suggestions.- Solution 1, reverse the burners: in our opinion isn’t a good solution and we suggest don’t use it- Solution 2, cutting 50 mm (or whatever needed) the areas with interference to install the valves is acceptable