Pall T Series User Manual

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4.5.3 Normalize the Water Permeability
1. Normalize the water permeability to a temperature of 20 °C using Equation 5:
Normalized Water Permeability Calculation and the temperature correction factors
(TCF20 °C) in Table 11.
Equation 5
Normalized Water Permeability Calculation
4.5.4 An Example of How to Determine Membrane Water Permeability
Example: Water permeate flux was measured for a 10 kD UF membrane cassette at
transmembrane pressures of 0.5, 1.0, and 1.5 barg and plotted in Figure 21.
Determine the initial normalized water permeability (NWP
20 °C).
Figure 21
Determining Membrane Water Permeability
Table 11
Temperature Correction Factors (TCF) for Normalizing Water Permeability
Temperature Correction Factors (TCF20 °C)
T °C TCF20 °C T °C TCF20 °C
4 1.57 28 0.83
5 1.52 29 0.81
6 1.47 30 0.80
7 1.43 31 0.78
8 1.39 32 0.76
9 1.35 33 0.75
NWP 20 °C = X TCF 20 °C
Permeate Flux Rate (LMH)
TMP
Permeate Flux (LMH)
150
100
50
0
0.5 1.0 1.5
Transmembrane Pressure (barg)
Temp = 16 °C
Equations
Water Permeability = 75 LMH @ 1 barg
NWP20 °C = 75/1.0 barg X TCF
Temperature Correction Factor = 1.109 (Correcting the water temperature from
16 °C to 20 °C)
Normalized Water Permeability
(NWP20 °C) = 75 x 1.109
= 83.17 LMH/barg

Pall T Series Specifications

General

Brand	Pall
Model	T Series
Category	Laboratory Equipment
Language	English