Honeywell FKN74C, FK74C Product specification sheet

EN0H-1149GE23 R1009 • Subject to change

FK74C/FKN74C

Reverse rinsing filter combination

Product specification sheet

FK74C	FKN74C
Construction

The filter combination comprises:

•Housing with pressure gauge

•Spring bonnet with adjustment knob

•Valve insert complete with diaphragm and valve seat

•Rotatable connector piece (FK74C only)

•Threaded union connectors (FK74C only)

•Fine filter in clear filter bowl

•Ball valve with drain connection

•Double ring wrench

Materials

•High quality synthetic material housing

•Brass threaded connections

•High quality synthetic material spring bonnet, valve insert and filter mesh carrier

•Red bronze connector piece (FK74C only)

•Stainless steel fine filter

•Shock-resistant, clear transparent synthetic material filter bowl

•Fibre-reinforced NBR diaphragm

•NBR seals

Application

The FK74C/FKN74C filter combinations comprise reverse rinsing filter and pressure reducing valve in one appliance. They ensure a continuous supply of filtered water. The fine filter stops the ingress of foreign bodies, for example rust particles, strands of hemp and grains of sand. The pressure reducing valve prevents pressure damage and reduces water consumption.

FK74C/FKN74C filter combinations are fitted in systems where a pressure reducing valve is required. Both horizontal and vertical installation is possible.

Special Features

•DIN/DVGW approved

•Inlet pressure balancing - fluctuating inlet pressure does not influence outlet pressure

•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

•The valve insert is of high quality synthetic material and can be fully exchanged

•Standardised discharge connection

•Meets KTW recommendations for potable water

Range of Application
Medium	Water
Inlet pressure	Maximum 16.0 bar
Outlet pressure	1.5 - 6.0 bar

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
Operating temperature	Maximum 30 °C
Connection size	3/4", 1", 11/4"

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FK74C/FKN74C Reverse rinsing filter combination

Connection size DA74C																																	R						3/4"													1"						11/4"
Weight																approx. kg																							2.9													3.5						3.8
Dimensions																												mm
																																	H						395													395						395
																																	h						285													285						285
																																	T						150													150						150
																																			t				66													66						66
																																			r				27													27						31
																																	D						105													105						105
																																			I				90													100						105
																																	L						162													184						203
kvs-value																																							5.5													6.0						6.5
DIN/DVGW Approval No.																																										DW-9311 AT 2316

Method of Operation

The filter combination combines reverse rinsing filter and pressure reducing valve in one appliance.

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.

The integral pressure reducing valve functions on a balanced force principle whereby the force exerted by a diaphragm is balanced against the force of an adjustment spring. The inlet pressure has no influence on opening or closing of the valve. Inlet pressure fluctuation does not therefore affect the outlet pressure.

Options

FK74C-...AA = Filter mesh size 100 m, incl. rotatable connector piece DA74C with threaded male connections

FK74C-...AC = Filter mesh size 50 m, incl. rotatable connector piece DA74C with threaded male connections

FK74C-...AD = Filter mesh size 200 m, incl. rotatable connector

piece DA74C with threaded male connections Connection size

FKN74C-1A = Filter mesh size 100 m; rotatable connector piece DA74C has to be ordered separately - see accessories

FKN74C-1C = Filter mesh size 50 m; rotatable connector piece DA74C has to be ordered separately - see accessories

DA74C

Z11S

VST06-A VST06-B

RV277

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

Available in sizes R1/2" - 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-1149GE23 R1009 • Subject to change

12 www.honeywell.com