FCM Design Equations

Flow Controller Design Equations

The following equations are used in the FC design program, and are referenced in those design pages.

Maximum flow rate through the FC:

Maximum flow rate through the flow controller valve:

Maximum allowable flow rate through the FC with reasonable tube length:

Maximum tube diameter given desired head loss constraint:

Maximum flow rate through each tube given the maximum tube diameter:

Minimum tube diameter to get laminar flow at maximum flow rate:

Minimum tube diameter to produce desired head loss using minimum length of tubing:

Length of tube required to get desired head loss at maximum flow: