Diafilter: Equipment Tab

Diafilter.jpg
Variable Definitions, Ranges and Default Values

The following table shows the meaning of the variables appearing in this tab, as well as their default values and their generally acceptable range. Note that due to the manner by which the variables are used by the sizing and costing equations, the range of acceptable values may be further reduced.

Variable

Default Value

Range

 

● Name
The name of the selected membrane.

Dft Membrane

 

◙ Membrane Area
The area of the selected membrane.

0.0 m2 

Positive

◙ Max. Membrane Area
The maximum area of the selected membrane.

80.0 m2 

Positive

Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output

Consumable

This equipment requires use of a ‘Filtration Membrane’ consumable which may be specified from the Membrane Filter: Consumables tab. The default consumable defined for a Diafilter is a Dft RO Membrane with a pore size 0.45 microns.

Sizing

In Calculate (Design Mode), the user specifies the Maximum Membrane Area and the system computes the Number of Units and the Membrane Area.

In User-Defined (Rating Mode), the user specifies the Number of Units and the Membrane Area.

Costing

The equipment purchase cost is based on the membrane’s area. By default it is calculated by the program’s built-in model for a Diafilter with a minimum membrane area of 5.0 m2.

For more information on this equipment, see Diafilter.

For information on the left-hand side variables and options, see Equipment Data Dialog: Equipment tab.