Watts N223BS - Manual

Series N223B/N223BS
Super Capacity Water Pressure
Reducing Valves*
Sizes: 2 1 ⁄
2
" – 3" (65 – 80mm)
Series N223B and N223BS 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 con-
sumption. 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 N223B features an enlarged
diaphragm, spring cage and seat orifice for super capacity perfor-
mance. Series N223BS has the same options as the N223B, except it
is furnished with a strainer. All parts are quickly and easily serviceable
without removing the valve from the line. The standard 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
• Bronze body construction
• Serviceable in line
• Series N223BS furnished with separate strainer
• Standard bypass feature controls thermal expansion pressure**
• Sealed spring cage on all models for accessible outdoor or pit installations
Models
N223B NPT threaded female inlet x NPT threaded female outlet
N223BS NPT threaded female inlet with strainer x NPT
threaded female outlet
For 1 ⁄
2
" – 2 1 ⁄
2
" (15 – 65mm) threaded connections, refer to literature
ES-223.
For 3" (80mm) flanged connections, refer to literature ES-N223F.
Specifications
A Water Pressure Reducing Valve shall be installed on the water ser-
vice pipe near its entrance to the building where supply main pres-
sure exceeds 60psi (413 kPa) to reduce it to 50psi (345 kPa) or lower.
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 built-in bypass check valves and strainer
will be acceptable. Approved valves shall comply with ASSE 1003. Valve
shall be a Watts Regulator Company Series N223B or N223BS (with
strainer).
For Commercial, Institutional and Industrial Applications
ES-N223B
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
diaphragm area for accurate
pressure control
Bronze body
construction
Renewable
stainless steel
alloy seat
Large stainless steel
perforated strainer screen
Sealed spring cage
Series N223B
* A water saving test program concluded that reducing the supply pressure from
80-50psi (551-345 kPa) resulted in a water savings of 30%.
** NOTE: The bypass feature will not prevent the pressure relief valve from open-
ing on the hot water supply system with pressures above 150psi (10.3 bar).
IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES
FOR LOCAL INSTALLATION REQUIREMENTS
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.
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––