UCTION MANUAL
Page 6
4.4 Refilling the Saturator
In the event the saturator must be refilled, follow the steps outlined in the DAF Saturator
Preparation steps in section 1. Open the bleed valve to hasten the filling process.
4.5 Calculating Recycle Rate
The recycle rate of the test can be calculated by utilising some of the measurements taken during
the DAF jar test.
V
SW
= Volume of saturated water transferred (per jar – this is the total volume transferred as shown
on the sight glass divided by the number of jars tested) [mL]
V
J
= Volume of test within 2L DAF Jar [mL]
this is 2000mL if filled to the line on the jar
V
D
= Volume of jar decanted
Example
Flocculation jar test performed with 2L of sample, 250mL of the sample was decanted prior to the
DAF jar test. During the DAF jar test 180mL of air saturated water was transferred.
5 PREPARING THE SATURATOR FOR STORAGE
When all testing is complete the saturator should be stored empty and depressurised. This is
achieved by the following;
1) Close the compressed air inlet valve and disconnect the compressed air line and any
connected jars.
2) Wait till the pressure gauge reads 0 kPa, if the pressure does not drop, slowly open the air
bleed valve till the pressure falls to 0 kPa.
Remove the water fill funnel cap and open the water fill valve. Invert the saturator to
completely drain it. Drying of the saturator internals by air flushing is recommended.
3) Replace the water fill funnel cap and close the water fill valve.
4) The Platypus DAF saturator is ready for storage.
