Watts LFN223F User Manual
For Commercial and Industrial Applications
ES-LFN223F
Job Name
Job Location
Engineer
Approval
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LEAD FREE
*
Contractor
Approval
Contractor’s P.O. No.
Representative
Series LFN223F/LFN223FS
Flanged Super Capacity
Water Pressure Reducing Valves**
Sizes: 3" (80mm)
Series LFN223F and LFN223FS Super Capacity Water Pressure
Reducing Valves are designed to reduce incoming water pressure
to a sensible level to protect plumbing system components and
reduce water consumption. This series is suitable for water supply
pressures up to 175psi (12.1 bar) and may be adjusted from 25
– 75psi (172 – 517 kPa). The standard setting is 50psi (345 kPa).
Series LFN223F features an enlarged diaphragm, spring cage and
seat orifice for super capacity performance. These valves also
contain a semibalanced piston feature to assure rapid response
to reduced pressure changes as well as to provide maximum flow
with minor pressure drop. Series LFN223FS has the same options
as the LFN223F, except it is furnished with a strainer. All parts are
quickly and easily serviceable without removing the valve from the
line.
Features
• Enlarged diaphragm, spring cage and seat orifice for super
capacity performance
• Iron body construction
• Stainless steel piston
• Series LFN223FS furnished with separate strainer
• Sealed spring cage on all models for accessible outdoor or pit
installations
Models
LFN223F Flanged inlet x Flanged outlet
LFN223FS Flanged inlet x Flanged outlet with strainer
For 1⁄2" – 21⁄2" (15 – 65mm) threaded connections, refer to literature ES-223.
1
For 2
⁄2" – 3" (65 – 80mm) bronze threaded valves, refer to
literature ES-N223B.
Sensitive spring and large
diaphragm are for accurate
pressure control.
High temperatureresisting nylonreinforced diaphragm.
All parts easily
serviceable
for quick
maintenance.
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Series LFN223F
Sealed cage
Iron body of
valve is coated
with special
corrosion
preventative
type of cold
galvanizing.
Renewable
stainless
steel seat
3
⁄4" (20mm) tapping for auxiliary regulator
Specifications
A Water Pressure Reducing Valve shall be installed on the water
service pipe near its entrance to the building where supply main
pressure exceeds 60psi (413 kPa) to reduce it to 50psi (345 kPa)
or lower. Valve shall be a Watts Series LFN223F or LFN223FS
(with strainer).
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
NOTICE
Companion flange size connections are 125 lbs. WSP.
NOTICE
Inquire with governing authorities for local installation requirements
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
**A water saving test program concluded that reducing the supply
pressure from 80-50psi (551-345 kPa) resulted in a water savings
of 30%.
Materials
Body: Iron coated with corrosion-resistant cold galvanizing
Seat: Replaceable stainless steel
Diaphragm: Reinforced Buna-N
Disc: EPDM
Piston: Stainless steel
Capacity
kPa psi
138 20
103 15
Pressure – Temperature
Temperature Range: 33°F – 160°F (0.5°C – 71°C)
Maximum Working Pressure: 175psi (12.1 bar)
Adjustable Reduced Pressure Range: 25 – 75psi (172 – 517 kPa)
Standard Reduced Pressure Setting: 50psi (345 kPa)
Options
WR 3⁄4" (20mm) Model LF223 auxiliary regulator
S Strainer (See ES-77F-DI-125 for details)
(piping not included)
Option WR
3" (80mm) LFN223F
High Pressure
Piping not provided
NOTICE
The information contained herein is not intended to replace the full
product installation and safety information available or the experience of a trained product installer. You are required to thoroughly
read all installation instructions and product safety information
before beginning the installation of this product.
Reduced Pressure
3
⁄4" (20mm) LF223 regulator
to handle low demands.
Set 10psi (68 kPa)
higher than LFN223F.
69 10
34 5
Reduced Pressure Fall-Off
0 0
40 80 120 160 200 gpm
152 304 456 608 760 lpm
M
Flow
C
D
N
AS
L
A
Dimensions — Weights
MODEL NO. SIZE (DN) DIMENSIONS WEIGHT
A AS C D L M N
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
LFN223F 3 80 121⁄2 318 — — 141⁄2 368 33⁄4 95 71⁄2 191 — — — — 86 39
LFN223FS 3 80 12
A Watts Water Technologies Company
ES-LFN223F 1325 © 2013 Watts
1
⁄2 318 225⁄8 575 141⁄2 368 33⁄4 95 71⁄2 191 101⁄8 257 7 178 120 54
USA: Tel. (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel. (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca
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