Return Flow Impeders are utilised in situations where the interior of the tube must remain as dry as practicable. Return flow impeders may provide more resistance to coolant flow than through-flow kinds, necessitating a greater coolant pressure. Under typical working situations, a minimum pressure of 80 Psi enables appropriate cooling. Inlet temperature, weld power, frequency, and weld area shape all influence coolant flow needs. Moreover, when employing Return Flow Impeders, it is best to use clean, filtered coolant.