Hale 2CBP - Manual (Page 26)

Booster Pumps
Sec III- 6 Preventive Maintenance
Refer to local procedures for pump testing
procedures and practices.
For Pitot gauge accuracy, the nozzle pressures
should be between 30 and 85 PSIG. See the
chart on the facing page for nozzle flow and
pressures. Table 3-3 provides GPM for various
nozzle sizes.
Because NFPA standards specify both GPM
and pressure, it is usually necessary to restrict
the flow somewhat to build up the pump
pressure. In normal pumping, this restriction
would be caused by the friction loss in the lines.
However, depending on line loss alone would
require a large amount of hose for some tests.
It is common practice to use 50 to 100 feet of
hose and gate the discharge valves as required
to maintain pressure.
Performance Testing Procedure
Note: The NFPA standards require a 10 percent
reserve in pressure at the capacity run when the
apparatus is delivered.
1. Check the relief valve according to the Relief
Valve Testing procedure under Weekly
Maintenance.
2. Perform steps 2 and 3 of the Post-Operation
Maintenance procedures in this section.
3. Run the standard pump test in accordance
with NFPA standards to check pump perfor-
mance.
4. Pumps rated below 750 GPM are tested for
an hour per NFPA 1901, 14-13.2.3.2. Run
the engine for 20 to 30 minutes to stabilize
the engine temperature. Then run the pump
for 20 minutes at capacity, 10 minutes at 70
percent capacity, and 10 minutes at 50
percent capacity.
5. If the apparatus does not reach performance
levels, refer to the Diagnostic/Service chart
in Section IV.
6. Compare the results of this test to those from
when the apparatus was delivered. It may
be that the apparatus did not show the 10
percent reserve at delivery. If the apparatus
Pump Model
Clearance Ring Inner Diameter (pressed
into pump body or pump head)
IN (MM)
Impeller Hub Outer
Diameter
Permissible
Clearance
CBP
3.6312-3.6326
(92.232-92.268)
3.620-3.622
(91.948-91.999)
.009-.013
(.227-.330)
AP
4.770-4.777
(121.158-121.336)
4.760-4.758
(120.904-120.853)
.012-.017
(.305-.432)
Table 3-2: Impeller and Clearance Ring Diameters and Clearance Values