2
Installation and Service
Maxitrol filters are suitable for multipoise mounting.
(Preferably with the lid facing down or to the side.) In-
stall the filter properly with gas flowing as indicated by
the arrow on the casting. It is also important to leave
sufficient space above the cover to allow for removal
in order to change the filter insert.
Frequency of filter insert maintenance is depen-
dent upon both the maximum operating pressure of
your equipment application, and the associated pres-
sure drop at the filter. Although, it is recommended
that the filter insert be replaced at least once a year.
See the adjoining pressure drop chart.
Shut off all gas before servicing the filter insert.
When loosening the screws secure the cover, proceed
slowly in case of any residual gas pressure. Remove
the cover and withdraw the filter insert.
place the filter insert so that it abuts correctly in rela-
tion to the flanges and base of the housing. The filter
insert should not extend into the area between the
o-ring and cover - slightly bend down the corners of
the matting to prevent o-ring obstruction. Replace the
cover and tighten the screws.
Check carefully for gas leaks immediately after the
filter has been installed or serviced and the gas turned
on. Do this before attempting to operate the appliance
or other gas-fired device. Use a rich liquid soap solu-
tion or other accepted leak tester on the area between
the cover and housing, and at the pipe connections.
Never use if leakage is detected.
Pressure Drop Curves
(0.64 sp gr gas)
Filter Replacement Material
Replacement filter matting material is available.
GF40 models - part number 101706-1
GF60 models - part number 101706-2
GF80 models - part number 101706-3
Pipe Size
NPT Model
ISO 7-1 Model
1/2"
GF40-1-44
GF40M-1-44
3/4"
GF60-1-66
GF60M-1-66
1"
GF60-1-88
GF60M-1-88
1-1/4"
GF80-1-1010
GF80M-1-1010
1-1/2"
GF80-1-1212
GF80M-1-1212
2"
GF80-1-1616
GF80M-1-1616
10
30
100
1000
2000
.3
1
10
100
3
(m
3
/hr)
Volumetric Flow Rate
100
(cfh)
1000
10000
100000
0.1
1
10
100
(inches W
.C.)
(mbar)
Pressure Drop (
r
P)
GF40-1-44GF60-1-66FG60-1-88
GF80-1-1010
GF80-1-1212
GF80-1-1616
Replace the filter insert with the side imprinted
'Austritt' (outlet) facing the outlet. Inspect the o-ring
and replace if necessary. To ensure an effective seal,