6
CENTURY, B-50-B18 AND B-50-B24 FIRE HYDRANTS
Hydrostatic Test, Storz Adapter and Storz Nozzle Installation
HYDROSTATIC TEST
• Remove a cap and open hydrant so barrel fills with
water. Replace cap and open hydrant fully.
• NOTE any leakage at:
1. ground line (traffic connection);
2. bearing housing connection;
3. nozzle to barrel connections;
4. cap gaskets.
• Use aquaphone or other leak detection device to
verify that there is no leakage below ground.
100 MM STORZ ADAPTER – INSTALLATION
Storz adapter is supplied with the following items:
• 100 mm Storz x female nozzle thread adapter;
• set screws;
• 2 adapter gaskets (
1
/
8
” thick and
1
/
16
” thick).
Orientation of Storz lugs should be approximately
vertical (Figure 3) to permit proper drainage (to avoid
build-up of ice in "pockets”). The following assembly
procedure is recommended:
• Inspect end face of pumper nozzle. Remove any
burrs etc. that could damage adapter gasket.
• Insert
1
/
16
” thick gasket only in Storz adapter and
thread adapter onto pumper nozzle.
• "Snug'' into position (using bar as illustrated in
Figure 3), but
do not over tighten
.
• Note orientation of lugs. If acceptable, complete
tightening of Storz adapter. If not acceptable,
repeat using
1
/
8
” gasket or
1
/
8
” +
1
/
16
” if necessary.
• Tighten set screws sufficiently to permit assembly of
cap to outlet.
• Pressurize hydrant to verify adapter to pumper
nozzle joint – retighten adapter if required.
• Remove set screws and run drill point into nozzle
(use
5
/
16
” drill). Replace set screws.
STORZ NOZZLE INSTALLATION –
CENTURY/B-50B TYPE HYDRANT
This procedure applies to hydrants with model desig -
nation Century, B-50-B18, B-50-B24 and B-50-BM.
NOTE: Replacement, as described in this pro -
cedure, can only be performed on resilient seated
pumper nozzles. Leaded-in type nozzles can be
converted by utilizing a Storz adapter that threads
onto the existing pumper nozzle.
PROCEDURE
• Remove pumper cap.
• Insert hydrant pumper nozzle wrench through
pumper nozzle. Wrench is inserted completely
through nozzle and pulled back to engage pocket
on wrench with lugs on nozzle retainer.
• Turn wrench handle in a
clockwise
direction (facing
nozzle). Continue turning while pulling lightly on
wrench (to maintain engagement} until nozzle
disengages retainer.
• Slide nozzle toward handle, reach into pumper port
with one hand to hold retainer in position and
remove wrench.
• Drop pumper nozzle from wrench, pick up Storz
connector with wrench and re-engage wrench with
lugs on nozzle retainer.
Position Storz connector in recess in upper barrel-lugs
on Storz engage pockets in upper barrel recess.
Turn wrench in
counter-clockwise
direction to
tighten Storz connector into position. Threading can
be started by turning wrench with one hand on
wrench shaft while positioning Storz connector with
other hand. After thread has started, tighten firmly.
FIGURE 3
20°
20°
Summary of Contents for B-50-B18
Page 7: ...7 CENTURY B 50 B18 AND B 50 B24 FIRE HYDRANTS Notes...
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