Check whether the AC220V power supply is normal; open the gas pipe manual valve and safety valve, check whether the gas pipe outlet pressure (6~8KPa) is normal; check whether the furnace pressure display value is at the "OPa position".Process Of Preventing Deformation And Cracking Of Mold By Vacuum Heat Treatment On the host computer, set the smoke valve to "manual" and set the smoke valve position to ~60%. Set the air valve to "manual" on the host computer, adjust the air valve position to 20%~30%, and start the fan. Check whether the wind pressure is normal (4~6KPa) and then set the wind pressure control to the "automatic" position.vacuum-brazing-repair-method-for-cracks Open the gas main manual gate valve, then open the gas emergency shut-off valve, and then open each relief valve until the pipeline gas inspection passes and then close the relief valve. ①. Set each HSK-B burner manipulator on site to the "local" position and turn on the power.Vacuum brazing of ceramic and metal materials ②. Press the "Start" button to turn on the small wind blowing. ③. Then set the controller to the "System" file.Vacuum Furnaces Leaks and Detection Techniques