1936 MK7 Reflow Oven System The 1936 MK7 is a high volume reflow oven system with 10 heated zones and belt speeds up to 1.88m/min. …Bottom Option) Max Working Temperature Standard: 350°C (Option: 400°C) Maximum PCB Width 55.9cm (22”) Cleanroom Option Down to Class 1000 MK7 Reflow Oven Main Page