Group
Size
3500 rpm
2900 rpm
1750 rpm
1450 rpm
1 x 1½ - 8H
22 (5)
18 (4)
11 (2.5)
9 (2)
1½ x 3 - 8
34 (8)
29 (7)
17 (4)
14 (3)
S/M
2 x 3 - 8
74 (17)
61 (14)
37 (9)
20 (5)
M (8 in.)
3 x 4 - 7
157 (36)
127 (29)
78 (18)
64 (15)
3 x 4 - 8G
159 (36)
129 (30)
79 (18)
65 (15)
M (10 in.)
1 x 2 - 10
21 (5)
13 (3)
9 (2)
7 (2)
1½ x 3 - 10
41.5 (9)
35 (8)
21 (5)
17.5 (4)
2 x 3 - 10
78 (18)
65 (15)
38 (9)
31 (7)
3 x 4 - 10
173 (40)
144 (33)
86 (20)
72 (16)
M (13 in.)
1½ x 3 - 13
53 (12)
44 (10)
26 (6)
22 (5)
5.9 Pump operation precautions
General considerations
WARNING:
•
Risk of serious personal injury or property damage. Dry running may cause rotating parts
within the pump to seize to non-moving parts. Do not run dry.
•
Risk of explosion and serious physical injury. Do not operate pump with blocked system
piping or with suction or discharge valves closed. This can result in rapid heating and va-
porization of pumpage.
•
Starting the pump in reverse rotation can result in the contact of metal parts, heat genera-
tion, and breach of containment. Ensure correct driver settings prior to starting any pump.
NOTICE:
Operation at reduced capacity
WARNING:
•
Risk of breach of containment and equipment damage. Excessive vibration levels can
cause damage to bearings, stuffing box, seal chamber, and/or mechanical seal. Observe
pump for vibration levels, bearing temperature, and excessive noise. If normal levels are
exceeded, shut down and resolve.
•
Risk of explosion and serious physical injury. Do not operate pump with blocked system
piping or with suction or discharge valves closed. This can result in rapid heating and va-
porization of pumpage.
•
Risk of equipment damage and serious physical injury. Heat build-up can cause rotating
parts to score or seize. Observe pump for excessive heat build-up. If normal levels are
exceeded, shut down and resolve.
NOTICE:
Cavitation can cause damage to the internal surfaces of the pump. Ensure net positive suction
head available (NPSH
A
) always exceeds NPSH required (NPSH
3
) as shown on the published
performance curve of the pump.
5.9 Pump operation precautions
52
Model 3296 EZMAG Installation, Operation, and Maintenance Manual
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