UFC 3-280-04
17 DEC 2003
Figure D-1. Vendor A Cartridge Filter Housing
280 mm (11 in)
LIFT JACK
RETENTION SCREW 3 PL TYP
COVER
BOLT
COVER BOLT 4 PL TYP
HANDLE
O-RING SEAL
HANDLE 2 PL TY
UPPER SEAL PLATE
EXCEL
TUBE GUIDE
VENT/GUAGE
1/4 FNPT
TIE ROD
LIFT-JACK
BARREL
TOP VIEW
SEE
DIM (A)
RETENTION SCREW
2 PL TYP
INLET 50 mm (2" N
OUTLET 50 mm (2" N
O-RING SEAL
LEG. 4 PL TYP
O-RING SEAL
LOWER PLATE SEAL
BOTTOM VIEW
LEG
PART No.
DIM (A)
NOTE: 50 mm (2") NPT STANDARD INLET AND OUTLET
6EFC1
480 mm (19 in)
NOTE: 50 mm or 75 mm (2" OR 3") FLANGE OPTIONAL
12EFC2
740 mm (29 in)
NOTE: ALL DIMENSIONS ARE NOMINAL UNLESS OTHERWISE NOTED
18EFC3
1000 mm (39 in)
24EFC4
1250 mm (49 in)
D-5
HEAD LOSS CALCULATIONS. Vendors A and B were evaluated to deter-
mine the Head loss characteristics of their 500 mm (20 inch) filter elements. Both indi-
cate similar results, so Vendor B data was included for this example. The calculated
loss per filter is equal to:
7 (L/s)/20 filters = 0.35 (L/s)/filter (5.6 gpm)
Based on the second chart of Figure D-2, for a flow of 0.35 L/s (5.6 gpm), the Head loss
per clean filter is approximately 1.4 kPa (0.2 psi). In addition the Vendor A literature (not
provided) indicates the Head loss through the filter housing is approximately 12 kPa (1.7
psi) at a flow rate of 7 L/s (110 gpm). Optional arrangements such as that shown in Fig-
ure D-2 indicate several housings containing fewer filters can be placed in parallel to in-
crease operator flexibility, and maintain a constant flow rate to the downstream process.
To ensure the constant operational flexibility, and to keep the process on line, three filter
housings will be installed, two operational and one in standby mode, each housing
containing 10 filter cartridgess each. Head loss calculations from the pump discharge to
the downstream holding tank were performed, resulting in an additional head loss
including differential water surface elevations equal to 22 kPa (3.2 psi). Total head loss
through the entire clean system equals
D-6
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