Goulds Pumps 3100 - IOM - Manual (Page 30)

OPERATION
GENERAL CONSIDERATIONS
Always vary capacity with regulating valve in the
discharge line. NEVER throttle flow from the suction
side.
Driver may overload if pumpage specific gravity
(density) is greater than originally assumed, or the
rated flow rate is exceeded.
Table 1
Minimum Allowable Flow
GPM (m
3
/h)
Pump RPM
Size Group 3600 3000 1800 1500
1 x1 1
2
-6 S 10 (2.3) 5 (1.1) 3 (0.7) 1 (0.2)
2 x 3-6 S 40 (9.1) 26 (5.9) 9 (2.0) 3 (0.7)
1 x1 1
2
-8 S 20 (4.5) 13 (3.0) 5 (1.1) 2 (0.5)
2 x 3-8 M 60 (13.6) 35 (8.0) — —
1 x 2-10 M 40 (9.1) 22 (5.0) — —
2 x 3-10 M 200 (45.5) 73 (16.6) — —
Always operate the pump at or near the rated
conditions to prevent damage resulting from
cavitation or recirculation.
OPERATING AT REDUCED CAPACITY
▲
! WARNING
Do NOT operate pump below minimum rated
flows (listed in Table 1) or with suction and/or
discharge valve closed. These conditions may
vaporize liquid creating an explosive hazard
due to confined vapor under high pressure
and temperature, and can quickly lead to
pump failure and physical injury.
DRAINING TANKS
▲
! WARNING
After pump has drained tank, it should be shut
down immediately. Operating pump after tank
has been drained of liquid will damage the
mechanical seal.
DISCHARGE VALVE CLOSED
▲
! WARNING
Do not operate pump with discharge valve
closed.
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.
SHUTDOWN
1. Slowly close discharge valve.
2. Shut down and lock out driver to prevent
accidental rotation.
▲
! WARNING
When handling hazardous and/or toxic fluids,
skin, eye and respiratory protection are
required. If pump is being drained,
precautions must be taken to prevent injury or
environmental contamination. Pumpage must
be handled and disposed of in conformance
with applicable environmental regulations.
22
3100 IOM 1/97