F74C
Construction
The fine filter comprises:
• Housing with pressure gauge
• Threaded connections
• Rotatable connector piece (F74C only)
• Fine filter in clear filter bowl
• Ball valve with drain connection
• Double wring wrench
Materials
• High quality synthetic material housing
• Brass threaded connections
• Red bronze connector piece (F74C only)
• Stainless steel fine filter
• Shock-resistant, clear transparent synthetic material filter
bowl
• NBR seals
FN74C
F74C/FN74C
Reverse rinsing fine filter
Product specification sheet
Application
F74C/FN74C reverse rinsing filters ensure a continuous supply of
filtered water. The fine filter prevents the ingress of foreign bodies,
for example rust particles, strands of hemp and grains of sand.
F74C/FN74C fine filters are used in systems where an existing
pressure reducing valve is fitted or where one is not required.
Both horizontal and vertical installation is possible.
Special Features
• DIN/DVGW approved
• Filtered water supplied even during reverse rinsing
• Patented reverse rinsing system - fast and thorough cleaning
of the filter with small amount of water
• Memory ring indicates when next manual reverse rinsing is
due
• Automatic reverse rinsing actuator with bayonet connector
can be retrofitted
• Large filter surface
• Shock resistant clear synthetic material filter bowl enables
easy checking of filter contamination
• Filter and complete filter bowl are replaceable
• Very simple operation
• Standardised discharge connection
• Meets KTW recommendations for potable water
Range of Application
Medium Water
The filter is constructed for drinking water installations. In case of
a process water application the filter has to be proven individually.
Technical Data
Installation position Vertical or horizontal,
with filter bowl downwards
Operating pressure Minimum 1.5 bar
Maximum 16.0 bar
Operating temperature Maximum 30 °C
Connection size
3
/4", 1", 11/4"
EN0H-1148GE23 R1009 • Subject to change without notice
www.honeywell.com 27
F74C/FN74C Reverse rinsing fine filter
Connection size DA74C R3/4"1"11/4"
Weight approx. kg 2.7 3.2 3.6
Dimensions mm
H 324 324 324
h 285 285 285
T 150 150 150
t666666
r272731
D 105 105 105
I 90 100 105
L 162 184 203
3
Flow value at ∆p=0.2bar m
-value 5.5 6.0 6.5
k
vs
DIN/DVGW Approval No. NW-9301 BO 0224
/h 3.5 4.0 4.5
Method of Operation
The filter insert comprises an upper part and a lower combination
section. When in the „filtering“ position, the small upper filter is
closed so that the water can only pass through the main filter
from outside to inside. When the ball valve is opened for reverse
rinsing, the filter is pushed downwards until the water supply to
the outer side of the main filter is stopped. Simultaneously, the
water flow is opened to the upper part of the filter. The water
needed for cleaning the filter passes through the upper sieve, the
rotating impeller and the main filter from inside to outside. By this
means, the filter is fully cleaned over its whole surface area at the
full inlet pressure. The filter automatically switches over to the
operating position when the ball valve is closed again.
Options
F74C-...AA = Filter mesh size 100 µm, incl. rotatable
connector piece DA74C with threaded male
connections
F74C-...AC = Filter mesh size 50 µm, incl. rotatable connector
piece DA74C with threaded male connections
F74C-...AD = Filter mesh size 200 µm, incl. rotatable
connector piece DA74C with threaded male
connections
Connection size
FN74C-1A = Filter mesh size 100 µm; rotatable connector
piece DA74C has to be ordered separately - see
accessories
FN74C-1C = Filter mesh size 50 µm; rotatable connector
piece DA74C has to be ordered separately - see
accessories
Z11S
VST06-A
RV277
28 www.honeywell.com
DA74C
VST06-B
ZA76C
Accessories
Z11S Automatic reverse rinsing actuator
For automatic filter cleaning at presettable intervals
DA74C Rotatable connector piece
For connection of retrofit filters and filter combinations
VST06-B Connection set
Solder connections
VST06-A Connection set
Threaded connections
RV277 Inlet check valve
1
Available in sizes R
/2" - 2"
ZA76C Connector piece
For conversion of the fine filters with rotatable
connector pieces (1 1/4" and 1 1/2") into retrofit filter
combinations (Converts 63 mm hole centres to 45 mm
hole centres)
EN0H-1148GE23 R1009 • Subject to change without notice
Installation Example
F74C/FN74C Reverse rinsing fine filter
Installation Guidelines
• Install in horizontal or vertical pipework with filter bowl
downwards
o This position ensures optimum filter efficiency
• Install shutoff valves
• Ensure good access
o Pressure gauge can be read off easily
o Degree of contamination can be seen with clear filter bowl
o Simplifies maintenance and inspection
• The installation location should be protected against frost
• Fit immediately after water meter
o Corresponds to DIN 1988, Part 2
Flow Diagram
Typical Applications
Fine filters of this type are suitable for supplies to buildings of all
types. They can also be used for commercial and industrial applications within the limits of their specifications.
Fine filters of this type are installed:
• Where there is existing metal or plastics pipework
• If the downstream system includes appliances which must be
protected against dirt
• For installation in horizontal or vertical pipework
• As replacement for an existing filter
• Where space is limited
EN0H-1148GE23 R1009 • Subject to change without notice
www.honeywell.com 29
F74C/FN74C Reverse rinsing fine filter
F74C
3
Spare Parts
F74C/FN74C Fine Filters (From 1995 onwards)
No. Description Dimension Part No.
1 Filter insert complete
Filter mesh 100 µm3/4" - 11/4" AF74-1A
Filter mesh 50 µm
Filter mesh 200 µm
2 Clear filter bowl
1
complete
3
/4" - 11/4" AF74-1C
3
/4" - 11/4" AF74-1D
3
/4" - 11/4"KF74-1A
3 Pressure gauge M07M-A16
(0 - 16 bar)
4 Double ring wrench
for removing filter
bowl (no fig.)
3
/4" - 11/4" ZR10K-3/4
2
FN74C
3
1
2
Automation and Control Solutions
Honeywell GmbH
Hardhofweg
D-74821 Mosbach
Phone: (49) 6261 810
Fax: (49) 6261 81309
http://europe.hbc.honeywell.com
www.honeywell.com
Manufactured for and on behalf of the
Environmental and Combustion Controls Division
of Honeywell Technologies Sàrl, Rolle, Z.A. La
Pièce 16, Switzerland by its Authorised Representative Honeywell GmbH
EN0H-1148GE23 R1009
Subject to change without notice
© 2009 Honeywell GmbH
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