Watts LFN223F - Manual

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
" – 2 1 ⁄
2
" (15 – 65mm) threaded connections, refer to literature ES-223.
For 2 1 ⁄
2
" – 3" (65 – 80mm) bronze threaded valves, refer to
literature ES-N223B.
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).
For Commercial and Industrial Applications
ES-LFN223F
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
Series LFN223F
*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%.
All parts easily
serviceable
for quick
maintenance.
Sensitive spring and large
diaphragm are for accurate
pressure control.
3 ⁄
4
" (20mm) tapping for auxiliary regulator
Sealed cage
High temperature-
resisting nylon-
reinforced diaphragm.
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 with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
LEAD FREE
*
Series LFN223F/LFN223FS
Iron body of
valve is coated
with special
corrosion
preventative
type of cold
galvanizing.
Renewable
stainless
steel seat
NOTICE
Companion flange size connections are 125 lbs. WSP.
NOTICE
Inquire with governing authorities for local installation requirements