If the separating temperature is to remain constant, what is the relationship between the specific gravity of the oil and the required size of the regulating ring? Illustration MO-0113

Correct Answer: Option D — The larger sized regulating rings are designed to be used with oils of lower specific gravities.

Purifier gravity disc sizing relies on the density differential between water and oil. Because lower specific gravity oils possess less buoyant force against the water seal, a larger regulating ring diameter is necessary to maintain the proper interface position for effective centrifugal separation.