Hale MBP Booster - Manual (Page 40)

39 Silencer Series Booster Pump, p/n: 029-0020-83-0
Operation
❑
❑ Monitor the water temperature.
Table 3-3: “Base Line NFPA Rat-
ings” on page 31 shows the
amount of lift loss as tempera-
tures rise.
❑ Monitor barometric pressure.
NFPA standard sets a baseline
of 29.9”Hg. (See Table 3-7: “Lift
Loss from Elevation.”)
Preventive Measures
❑ Regularly inspect suction hoses
to check for air leaks. Air leaks can also cause cavitation.
❑ Consider the size of the suction hose. Table 3-8: “Hose Size vs. Pump
Rating Capacity” lists the NFPA pre-selected hose sizes for each pump-
rating capacity. Using the appropriately sized hose minimizes the occur-
rence of cavitation. An undersized suction hose can lead to cavitation.
❑ Consider the piping within the truck. Suction losses can result from addi-
tional suction piping added to the fire pump during assembly.
❑ Follow the maintenance and inspection procedures.
Hose Diameter
in. (mm)
3”
(76)
4”
(102)
4.5”
(127)
5”
(127)
6”
(152)
Dual
6” (152)
Flow
gpm (lpm)
Lift Loss (gpm (lpm)
250 (946) 5.2 (20)
350 (1,325) 2.5 (9.5)
500 (1,893) 5.0 (19) 3.6 (13.6)
750 2,839) 11.4 (43) 8.0 (30) 4.7 (18 1.9 (7.2)
1,000 (3,785) 14.5 (55) 8.5 (32) 3.4 (13)
1,250 (4,732) 13 (49) 5.2 (20)
1,500 (5,678) 7.6 (29) 1.9 (7.2)
1,750 (6,625) 10.4 (39) 2.6 (10)
2,000 (7,571) 3.4 (13)
2,500 (9,464) 5.2 (20)
Table 3-8: Hose Size vs. Pump Rating Capacity
Barometric Reading
in. (mb)
Lift Loss
Head Ft. (mm)
29.9 (1,012.5) NFPA Base Line
29.7 (1,005.8) 0.2 (0.6)
29.5 (999) 0.5 (0.15)
29.3 (999.2) 0.7 (0.21)
29.1 (985.4) 0.9 (0.27)
28.9 (987.7) 1.1 (0.33)
28.7 (971.9) 1.4 (0.43)
Table 3-7: Lift Loss from Elevation