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Summary of centrifugal fire pump data (U.S. Customary)
Minimum pipe sizes (Nominal) (in.)
Pump rating
Suction Discharge Relief valve Relief valve
(gpm)
25
1
50
1 1/2
100
2
150
2 1/2
200
3
250
3 1/2
300
4
400
4
450
5
500
5
750
6
1000
8
1250
8
1500
8
2000
10
2500
10
3000
12
3500
12
4000
14
4500
16
5000
16
7.4.3 Coling loop and combustion exhaust air outlet
for diesel motor. Refer to the Installation and
operating instructions of the diesel motor.
Cooling loop
NOTICE:
1. Piping arrangement according to NFPA-20.
2. Piping arrangement by other
3. Discharge pipe from heat exchanger outlet is
at a minimum one pipe size larger than the
inlet pipe to the heat exchangers.
12
discharge
1
3/4
1
1 1/4
1 1/4
1 1/2
2
1 1/2
2
2 1/2
2
2 1/2
3
2
2 1/2
3
2
2 1/2
4
2 1/2
3 1/2
4
3
4
5
3
4
5
3
5
6
4
5
6
4
6
8
6
6
8
6
8
10
6
8
10
6
8
12
8
8
12
8
10
12
8
10
14
8
10
14
8
10
Meter device Number of hose
valves
1 1/4
1
2
1
2 1/2
1
3
1
3
1
3 1/2
1
3 1/2
1
4
2
4
2
5
2
5
3
6
4
6
6
8
6
8
6
8
8
8
12
10
12
10
16
10
16
10
20
4. Shut-off valves in the automatic flow line are
provided with lockable handles for cooling
loops tested according to FM requirements.
These valves have been provided with a tem -
porary locking pin to keep them in open posi -
tion. Replace the retainer with a 9/32" lock.
ƒ Cooling loop water - direction of flow
Size of hose
Hose header
valve
supply
1 1/2
1
1 1/2
1 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
2 1/2
3
2 1/2
4
2 1/2
4
2 1/2
4
2 1/2
6
2 1/2
6
2 1/2
8
2 1/2
8
2 1/2
8
2 1/2
10
2 1/2
10
2 1/2
12
2 1/2
12
2 1/2
12
2 1/2
12
WILO SE 08/2019
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