Whatever the process used, crude oil must be refined. The complete refining of oil consists of the following operations: • separation of solid impurities that is impurities not soluble in oil, • separation of free water, • partial separation of dissolved moisture that is dehydration or drying, • de-gumming, • separation of free fatty acids […]

All welding machines are designed to step-down voltage – low voltage, high current and also taking safety factor into consideration. The secondary voltage, open circuit voltage (OCV) is in the range of 50 – 100 V with the current ratings varying from 5 A – 800 A.