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fire fighting systems hydrants
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7/17/2019 Installation Guide k81 Guardian Hydrant Fba02cc1
http://slidepdf.com/reader/full/installation-guide-k81-guardian-hydrant-fba02cc1 1/21
Kennedy Valve
Prepared by: Dan Burczynski
K81 Guardian Hydrant
Nozzle Installation Procedure
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Typical K81 Guardian
Hydrant upper barrel
with nozzles removed.
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Nozzle set
screw holes are
gauged for
proper fit toassure sealing
and control of
installation
torque.
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Install a new set screw by turning
it clockwise using a ¼ hex Allen
wrench.
NOTE: Always ensure that the hex wrench
is good condition and that it is fully
engaged in the hex socket of the screw.
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Thread the set screw in
until flush with outside
surface.
Note: End of set screw
painted white for clarity.
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After inspecting the o-ring
seating surface in the upper
barrel for dirt/debris, lightly
lubricate and install a newo-ring as shown (use
Nevastane or comparable
food grade grease).
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Insert the nozzle as
shown and until
contacting the o-ring.
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By hand, rotate the nozzle
counter-clockwise as far
as possible assuring that
the nozzle and the o-ringremain centered.
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Using the proper size
Kennedy nozzle
installation tool, insert thetool such that the larger
notch fits over the set
screw and engages the
drive lugs (push in as far
as it can go).
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Wrench shown installed
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Wrench fully installed
(inside view)
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Rotate nozzle
counter-clockwise
using steady
force.
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Notice as the nozzle is
rotated, the end of setscrew will begin
showing while moving
into its final position
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Nozzle shown
fully inserted
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When properly installed,
the nozzle set screw
must clear this shoulder
before proceeding.
Note: The gap shown has
been exaggerated for clarity
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After set screw is clear ofthe retention shoulder,
remove nozzle wrench
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Fully engage ¼ hex
wrench
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Tighten set screw (clockwise)until the screw is between flush
and up to 1/8 protruding into
the inside of the nozzle.
NOTE: Always ensure that the hex wrench
is good condition and that it is fully
engaged in the hex socket of the screw.
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When installed correctly,
there should be a slight
gap between the end of
the screw and the hydrant
body.
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The outside diameter of
the set screw should just
touch or have up to a 1/16 gap.
Threaded portion of nozzle
was removed for clarity.
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When correctly installed,
the nozzle should becentered in upper barrel
nozzle port, with the o-ring
uniformly seated.