Goulds Pumps 3296M - IOM - Manual (Page 25)

STARTING PUMP
1. Make sure suction valve and any recirculation or
cooling lines are open.
2. Fully close or partially open discharge valve as
dictated by system conditions.
3. Start driver.
l
! CAUTION
Immediately observe pressure gauges. If discharge
pressure is not quickly attained - stop driver,
reprime and attempt to restart.
4. Slowly open discharge valve until the desired flow
is obtained.
l
! CAUTION
Continuous operation against closed discharge
valve will cause pump to overheat. Overheating
the magnetic drive assembly will weaken or ruin
the magnets.
s
! WARNING
Continuous operation against closed discharge
valve may vaporize liquid creating an explosive
hazard due to confined vapor under high pressure
and temperature.
OPERATION
GENERAL CONSIDERATIONS
Always vary capacity with valve in discharge line.
NEVER throttle flow from suction side.
Driver may overload or magnets de-couple if pumpage
specific gravity (density) is greater than originally
assumed, or rated flow rate is exceeded.
Always operate the pump at or near the rated
conditions to prevent damage resulting from cavitation
or recirculation.
l
! CAUTION
Do not operate above rated temperature range of
magnets as this will weaken or ruin the magnets.
Table 3
Temperature Ratings
Magnetic Types
Drive
Designation
Rated
Temperature
Neodymium Iron
NdFe
A,B,C,D,E,F 250°F (120°C)
Samarium
Cobalt
SmCo
AA,BB,CC,DD,
EE,FF
425°F (220°C)
OPERATING AT REDUCED
CAPACITY
s
! WARNING
Do NOT operate pump below minimum rated flows or
with discharge valve closed. These conditions may
vaporize liquid creating an explosive hazard due to
confined vapor under high pressure and temperature.
Table 4
Minimum Allowable Flow
Group
Pump
Size
Minimum Flow*
60 Hertz 50 Hertz
GPM m 3 /h
3600 1800 2900 1500
M
2x3-8 60 32 11 6
3x4-8 - 112.5 40 23
3x4-8G 150 75 30 14
1x2-10 17 8.5 3 1.6
2x3-10 80 44 16 8
3x4-10H - 150 - 28
1 1
2
x3-13 - 41 - 8
2x3-13 - 80 - 15
* Based on water with a specific Gravity of 1.0 and
Specific Heat of 1.0
OPERATING UNDER
FREEZING CONDITIONS
Exposure to freezing conditions, while pump is idle,
could cause liquid to freeze and damage the pump.
Liquid inside pump should be drained. Liquid inside
cooling coils, if supplied, should also be drained.
3296 M Group 6/05
21
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