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Microhidráulica Industrial

Liquid Flow – Two Forumlas for Combinations of Restrictors

PARALLEL FLOW, the total Lohm rating is:

Please note that this relationship is identical to the electrical equation.

SERIES FLOW, the total Lohm rating is:


Please note that this relationship is not the same as in electrical problems. The difference is due to the non-linearity of


Please note that this relationship is not the same as in electrical problems. The difference is due to the non-linearity of

When L1 = L2 = L3 , then

For passageway size: DT = D/ N1/4

DT = Diameter of a single equivalent orifice, with a Lohm rate = LT

D = Diameter of the actual orifices, each with a Lohm rate = L1

PARALLEL FLOW, the total Lohm rating is:

Please note that this relationship is identical to the electrical equation.

SERIES FLOW, the total Lohm rating is:


Please note that this relationship is not the same as in electrical problems. The difference is due to the non-linearity of


Please note that this relationship is not the same as in electrical problems. The difference is due to the non-linearity of

When L1 = L2 = L3 , then

For passageway size: DT = D/ N1/4

DT = Diameter of a single equivalent orifice, with a Lohm rate = LT

D = Diameter of the actual orifices, each with a Lohm rate = L1