Zurn Wilkins ZW209FP Installatin, Start-Up, Maintenance Instructions

Model ZW209FP
Fire Protection Pressure Reducing Valve Assembly
1-1/4", 1-1/2", 2", 2-1/2", 3", 4" & 6"
Installation
DESCRIPTION
The Zurn Wilkins ZW209FP pilot operated pressure reducing
valve is designed
to reduce high inlet pressures to a safe and stable outlet
pressure. The pilot assembly reacts to changes in downstream
pressure allowing the main valve to modulate between the
closed and open position ensuring a constant downstream
set pressure. Once the downstream pressure reaches the
pilot setting, the main valve will seal shut preventing damage
downstream. Pressure regulation is not dependent upon
rate, resulting in minimal pressure loss through the valve.
In addition the ZW209FP and ZW209FPG come standard
with red epoxy coating internally and externally for corrosion
protection, as well as isolation valves and pressure gauges for
quick and easy maintenance or repair
Installation / Start-up
INSTALLATION
NOTE: Prior to installation of the ZW209FP, ensure that all
1. During the installation of a ZW209FP in a sprinkler system,
Underwriter Laboratories (UL) requires NFPA 13 "Standard for
Installation of Sprinkler Systems" be followed.
2. Upon installation UL also requires that the ZW209FP be
tested in accordance with NFPA 13 or NFPA 14. Thereafter the
valve shall be inspected, tested, and maintained in accordance to
NFPA 25 "Standard for the Inspection, Testing, and Maintenance
of Water-Based Fire Protection Systems". NOTE: Initial testing
must be done with the design inlet pressure so the proper
3. For making adjustments and servicing allow for adequate
space around the valve.
4. When installing a ZW209FP valve gate valves installed on
both inlet and outlet are recommended for maintenance allowing
for isolation of valve.
5. Position the ZW209FP in line matching the direction of
indicated on the valve model tag with the proper direction of
in the system. Once attached to line double check all fasteners/
bolts in the pilot system and on main valve are tight and there is
no damage prior to pressurizing system.
NOTE: Pressure in some applications can be very high so be
thorough in checking and inspecting for proper installation
and makeup.
6. Valves installed in sprinkler or standpipe systems shall have
the following:
a) Unions or rubber gasket
stream or downstream to permit replacement.
b) A relief valve (at least ½" size and 175 psi max.) installed
on the downstream side and plumbed to a safe drainage.
c) Pressure gauges installed on the inlet and outlet.
d) Shall not be set for less than 50 psi.
®
Start-up
for suppression systems
installed immediately up
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Maintenance Instructions
ZW209FP
Class 300 Flanged
Max 300 psi Inlet
7. It is suggested that a line size tee connection be installed
downstream of sprinkler system valves to allow full
as required every years per NFPA 25.
. 8 B e l e d a t l l a r p p e d i a
Trapped air may cause outlet pressure
9. Zurn Wilkins valves are designed to operate in both the verti-
cal and horizontal positions. However, it is recommended that
ZW209FP's 6" and larger, be installation in the horizontal position.
The horizontal positioning of the larger valves avoids premature
wear due to mass of plunger assemblies as well as allows for
greater accessibility during annual inspections, and maintenance.
START-UP
CAUTION: To prevent personnel injury and damage to equip-
ment check that downstream venting is adequate prior to
start-up and test procedures. All adjustments under pressure
the main valve closes too fast it may cause surging in upstream
piping.
as 1. Slowly open the upstream shutoff valve only enough to
main valve assembly and pilot system. Prior to pressurizing the
valve assembly it is also recommended that a ZPI valve position
indicator be installed to aid in verifying proper valve movement.
2. As the valve is
main valve and pilot system of air. To vent air, partially open or
loosen the highest plugs or
position indicator is a great location, as it has a test cock at the
top to vent air pressure. It may be necessary to bleed system
more than once. After removal of air in the system tighten all
loose
3. At this point with the upstream shutoff valve partially open,
slowly open the downstream shut off valve. Flow will begin to
occur and pressure should build up in valve and eventually
stabilize.
ZW209FPG ZW209FPX
Grooved Class150 Flanged
Max 300 psi Inlet Max 250 psi Inlet
ZW209FPTH
Threaded
Max 300 psi Inlet
f r o r m s u p p y l r s i r e a n d s r p n i
at low
with water, it is necessary to bleed the
in the system. The ZPI valve
ZURN WILKINS
www.zurn.com
®
testing
l k r e s s y e t m .
If
1