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F74C REVERSE RINSING FILTER; MV876 AUTOMATIC-BACKWASH CONTROLS
3 62-3061
Operating Pressure Drop Versus Flow:
See Fig. 2.
Maximum recommended: 3 psi to 7 psi (with clean screen).
Fig. 2. F74C Pressure drop vs. flow.
Connections:
Union on inlet and outlet: External NPT
threaded or sweat. Inlet/outlet assembly can be rotated to fit
on vertical or horizontal piping.
Screen Sizes:
Shipped with Device: 100 microns.
MV876 Automatic-Backwash Control:
MV876B1018: Bayonet mounted shaft of 24 Vac motor and
timer replaces ball valve manual control for automatic
backwash at preprogrammed intervals. 24V transformer
not included. For use with F74C and F76S Filters only.
Specifications:
Power: 4 VA.
Current: 170 mA.
Voltage: 24 Vac.
Cycle time: 20 seconds (approximate).
Timer: Variable. See Table 3.
Accessories for F74C:
AF74-1A Replacement filter assembly for F74C, 3/4 in. and
1 in., 100 micron; includes the filter insert complete (O-ring,
mesh with mesh support, impeller), sump O-ring (mounted
between the filter housing and the sump).
KF74-1A Replacement sump assembly for the F74C; includes
the sump assembly complete (ball valve, plastic air gap
adaptor), sump O-ring (mounted between the filter housing
and the sump).
TBD Opaque sump cover for F74C 3/4 in. and 1 in.
U76S5015 3/4 in. sweat tailpiece.
U76S5023 1 in. sweat tailpiece.
U76T1014 3/4 in. NPT tailpiece.
U76T1022 1 in. NPT tailpiece.
901444 Union gasket for F74; 3/4 in., 10 gaskets in package.
Table 2. Flow Capacity of F74C in Gallons per Minute (gpm).
Table 3. MV876B Timer Selections.
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
03 710 20
0.0
PRESSURE DROP (PSI)
FLOW (GPM)
F74C1023
F74C1015
MAXIMUM RECOMMENDED
PRESSURE DROP WITH
CLEAN SCREEN.
M17656
Model Size
Pressure Drop in psi
Cv1 234515
F74C1015 3/4 9.0 12.7 15.6 18.0 20.1 34.9 9
F74C1023 1 10.1 14.3 17.5 20.2 22.6 39.1 10.1
Program Value Backwash Interval
1 4 minutes
2 8 minutes
316 minutes
432 minutes
5 1 hour
6 2 hours
7 4 hours
8 8 hours
9 17 hours
10 34 hours
11 3 days
12 6 days
13 11 days
14 23 days
15 45 days
16 3 months