MASP 13-GB
rev. 0 NOV10
DISTANCE BETWEEN SPARK DETECTOR AND SPRAY NOZZLE
The minimum distance is based on 0.2 sec
delay time due to the response delay time of
the solenoid valve and water travelling time
from solenoid valve to nozzle (with a 3-4 bar
water pressure).
The maximum distance is based on 3 sec
time the spark detector is held active for
each spark detected (the nozzle sprays water
for 3 sec).
Air speed range is normally 20-30m/s for
woodwork and 15-20m/s for textile or other
industries.
When the available duct length is critical,
a higher water pressure of 5-6 bar is
suggested.
See graph and table below with details about
air speed range covered by duct length
available for extinguishing.
Standard distance 15 meters
If duct length is enough, standard distance
of 15 meters based on 0.2 sec delay time
covers an air speed range from 5 meters
per second to 75 meters for second, that is
highly sufficient for most applications.
Available
duct
length
Air speed range m/s
(meters per second)
m
from
to
1
1
5
2
1
10
3
1
15
4
2
20
5
2
25
6
2
30
7
3
35
8
3
40
9
3
45
10
4
50
11
4
55
12
4
60
13
5
65
14
5
70
15
5
75
16
6
80
17
6
85
18
6
90
19
7
95
20
7
100
m/s 80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 m
dmin
dmax
dst
Air speed in the duct in meters per second
Air speed range for nozzle distance
Nozzle distance from detector in meters
Useful
range
dmin
= minimum distance line (the points
are obtained by multiplying speed
by 0,2)
dmax
= maximum distance line (the points
are obtained by multiplying speed
by 3)
dst
= standard distance (15meters)
Note:
if air speed is less than 5m/s, standard
distance is higher than maximum distance;
if air speed is more than 75m/s, standard
distance is less than minimum distance.
Summary of Contents for GTS Control Logic RIV-601P/S
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