Watts LF223S - Manual

Series LF223, LF223S
High Capacity Water Pressure
Reducing Valves**
Sizes: 1 ⁄
2
" – 2 1 ⁄
2
" (15 – 65mm)
Series LF223 and LF223S High 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.
The LF223/LF223S features Lead Free* construction to comply with Lead
Free* installation requirements. This series is suitable for water supply
pressures up to 300psi (20.7 bar) and may be adjusted from 25 – 75psi
(172 – 517 kPa). The standard setting is 50psi (345 kPa). Series LF223
features an enlarged diaphragm, spring cage and seat orifice for high
capacity performance. Series LF223S has the same options as the
LF223, except it is furnished with a strainer. All parts are quickly and
easily serviceable without removing the valve from the line. The optional
bypass feature permits the flow of water back through the valve into the
main when pressures, due to thermal expansion on the outlet side of the
valve, exceed the pressure in the main supply.
Features
• Enlarged diaphragm, spring cage and seat orifice
for super capacity performance
• Lead Free* brass body construction (except 2 1 ⁄
2
” (65mm) which is iron)
• Serviceable in line
• Series LF223S furnished with separate strainer
• Optional bypass feature controls thermal expansion pressure***
• Sealed spring cage on all models for accessible outdoor or pit instatllations.
Models
LF223 NPT threaded female inlet x NPT threaded female outlet
LF223-S NPT threaded female inlet with strainer x NPT threaded female outlet
For 2
1 ⁄
2
" – 3" (65 – 80mm) bronze threaded valves,
refer to literature ES-LFN223B.
For 3" (80mm) flanged connections, refer to literature ES-LFN223F.
For Commercial, Institutional and Industrial Applications
ES-LF223
Available with or without
separate strainer
Disc holder removable for replacement of
disc without dismantling the valve —
no special tools required.
Sensitive spring
and large dia-
phragm area for
accurate
pressure control
Lead Free*
brass body
construction
1 ⁄
2
" – 2"
Replaceable
stainless seat
High temperature
resisting diaphragm
for hot or cold water.
Large stainless steel
perforated strainer screen.
Sealed spring cage
LF223S
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
*
* 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%.
*** The bypass feature will not prevent the pressure relief valve from
opening on the hot water supply system with pressure above
150psi (10.3 bar).
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
NOTICE
Inquire with governing authorities for local installation
requirements
Specifications
A Lead Free 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. The water pressure reducing valve shall be constructed using Lead
Free* materials. Lead Free* regulators shall comply with state codes and
standards, where applicable, requiring reduced lead content. Sill cocks
and outside wall hydrants may be left on full main pressure at the option
of the owner. Provision shall be made to permit the bypass flow of water
back through the valve into the main when pressures, due to thermal
expansion on the outlet side of the valve, exceed the pressure in the
main supply. Pressure reducing valves with builtin bypass check valves
and strainer will be acceptable. Approved valves shall comply with ASSE
1003. Valve shall be a Watts Series LF223 or LF223S (with strainer).