Tyco HV - Design Criteria; Nozzle Placement; Main Pipeline Strainers; Installation

Design
Criteria
Nozzle Placement. The nominal over-
all spray patterns, spacing, and maxi-
mum recommended axial distances
for six patterns of the Type HV Nozzles
are given in Figure 2 for residual (flow-
ing) pressures of 30 to 80 psi (2,1 to
5,5 bar). A minimum residual pressure
of 30 psi (2,1 bar) can typically be used
for most applications; however, a mini-
mum residual pressure of 50 psi (3,4
bar) is recommended for applications
requiring higher velocity water deliv-
ery, such as those specifying rapid ex-
tinguishment of oil fires by emulsifica-
tion.
With reference to Figure 2, use of the
“Design Spray Profile” for the “Design
Spray Area” will help assure that direct
impingement on all surfaces will occur.
The “Design Spray Area” shown at the
topFigure2-Part2of2onPage4
consists of the square of length “S”
within the circular “Overall Spray
Area”.
The maximum recommended axial
distances given in Figure 2 are based
on maintaining the specified spray pat-
terns under a maximum wind condition
of 15 MPH (24 km/h).
Figure 3 provided a reference guide
showing the overall still air spray pat-
terns beyond the maximum 15 MPH
(24 km/h) axial distances, when pro-
jecting horizontally. As shown in Fig-
ure 3, the spray patterns become non-
concentric, beyond a certain point, due
to the affects of gravity.
Main Pipeline Strainers. Even
though individual strainers have been
provided, main pipeline strainers are
required for systems utilizing Type HV
Nozzles, since their waterways are
less than 3/8 inch (9,5 mm) diameter.
Installation
Type HV Nozzles must be installed in
accordance with the following instruc-
tions:
NOTE
A leak tight 1 inch NPT nozzle joint
should be obtained with a torque of 20
to30ft.lbs.(26,8to40,2Nm).Aleak
tight 1-1/4 inch NPT nozzle joint
should be obtained with a torque of 30
to 40 ft.lbs. (40,2 to 53,6 Nm). Higher
levels of torque may distort the nozzle
inlet and cause impairment of the noz-
zle.
Step 1. With pipe thread sealant ap-
plied to the pipe threads, hand tighten
the nozzle into the nozzle fitting.
Step 2. Tighten the nozzle into the
nozzle fitting using an adjustable cres-
cent wrench. With reference to Figure
1 the adjustable crescent wrench is to
be applied to the wrench hex.
TFP815
Page 5 of 6
N
O
TES:
The Overall Spray Patterns in the plan view are the same as those in Figure C-1.
Reference dta applies to still air.
2.
1.
0
2
4
6
2
44
2
0
2
4
6
0246810121416
1614121086420
4,8 0
1,2
0
1,8
1,5
1,0
0,5
0,5
1,0
0,51,01,52,02,53,03,54,04,5
1,0
1,2
0,5
0,5
1,0
1,5
1,8
2,54,04,8 4,5 3,5 3,0 1,02,0 1,5 0,5 0
0
HORIZONTAL DISTANCE, FEET HORIZONTAL DISTANCE, METERS
ELEVATION, METERS
ELEVATION, FEET
60
26
14
45
37
17
17
37
45
14
60
26
26
45
17
60
37
14
17
45
37
14
26
60
FIGURE 3
REFERENCE GUIDE SHOWING THE OVERALL VERTICAL SPRAY PATTERNS
WHEN PROJECTING WATER HORIZONTALLY BEYOND THE DESIGN PARAMETERS GIVEN IN FIGURE 2
— 30 to 80 PSI (2,1 to 5,5 bar) —