Specifications

Document No. DER04097 OPERATING INSTRUCTIONS
Page 4 of 7 Effective Date 27 Nov 07
Pond Depth
Pond depth can only be adjusted with the centrifuge fully stopped and locked out and tagged out.
For this reason, pond depth is usually adjusted after the feed rate is adjusted. The factory pond
depth setting of 3.4 is usually satisfactory when used in conjunction with feed rate adjustment.
However, if desired results cannot be achieved by adjusting the feed rate, changing the pond
depth may be helpful.
Four adjustable effluent ports (Figure 4097-1) on the liquid bowl head are used to set the pond
depth; all ports must be set identically. A higher pond depth increases settling time by permitting
more liquid to remain in the bowl. However, a higher pond depth also reduces the beach area at
the solids discharge end of the bowl, which will result in a wetter solids discharge.
To adjust pond depth, proceed as follows:
WARNING! DO NOT OPEN COVER OR ATTEMPT AND ADJUSTMENT OR
MAINTENANCE ON THE CENTRIFUGE UNLESS THE BOWL IS AT A
COMPLETE STANDSTILL.
1. Shut down, lock out, and tag out the centrifuge using the Normal Shutdown procedure
described later in this section.
2. Open case cover.
3. Loosen three screws securing mounting ring to liquid bowl head, rotate the effluent port until
the desired setting is positioned at the alignment marks, and tighten screws. All four effluent
ports must be set to the same position.
4. Close case cover after completing adjustments.
Figure 4097-1 Effluent Port Adjustment