24
NOTE: If the pump does not prime properly, or loses
prime during start-up, it should be shutdown and the
condition corrected before the procedure is repeated.
5. (Pumps moving high temperature liquids.) Open
the warm-up valve to circulate liquid for preheating.
Consult the instructions that cover such specially
designed heating system.
6. Start the pump driver (turbines and engines may
require warming up; consult the manufacturer's
instructions).
7. When the pump is operating at full speed, open
the discharge valve slowly. This should be done
promptly after start-up to prevent damage to pump
by operating at zero flow.
8. Adjust the liquid seal valves to produce the
recommended pressure for either the mechanical
seal or packed stuffing box.
Operating checks
1 . Check the pump and piping to assure that there
are no leaks.
2. Check and record pressure gauge readings for
future reference.
3. Check and record voltage, amperage per phase,
and kW if an indicating wattmeter is available.
4. Check bearings for lubrication and temperature.
Normal temperature is 180°F maximum.
5. Check and adjust stuffing box for correct operation.
(See page 31).
6. Check sealing water lines and valves.
CAUTION: MAKE ALL PUMP OUTPUT ADJUSTMENTS
WITH THE DISCHARGE VALVE. DO NOT THROTTLE
THE SUCTION LINE TO ADJUST THE PUMP OUTPUT.
Shutdown
The following steps of procedure will take care of
most normal shutdowns of the pump. Make any
further adjustments of process piping, valves, etc., as
required. If the pump is to be removed from service
for an extended period of time, refer to "Temporary
Storage" and "Freezing Protection" (See page 17).
1. Close the discharge valve slowly.
NOTE: When stopping pump, always close discharge
valve first.
2. Shut down the driver (Consult manufacturer's
instructions for special operations.)
3. Close seal liquid valves. (If pumped liquid is dirty
or if leakage is to be prevented, these lines should
always be left open.)
4. Open drain valves as required.
Freezing protection
Pumps that are shut down during freezing conditions
should be protected by one of the following
methods.
1 . Drain the pump; remove all liquids from the
casing.
2. Keep fluid moving in the pump and insulate or heat
the pump to prevent freezing.
CAUTION: IF HEAT IS USED TO KEEP THE PUMP
FROM FREEZING, DO NOT LET THE TEMPERATURE
RISE ABOVE 150°F.
Field tests
Performance curve
A typical performance curve for a specific pump
can be obtained from Goulds Water Technology.
This can be used in conjunction with a field test,
if one is required. All Goulds Water Technology
pump tests and curves are based on the "Hydraulic
Institute Standards." Any field test must be conducted
according to these Standards.
Unless otherwise specifically agreed, all capacity,
head, and efficiencies are based on shop tests when
handling clear, cold, fresh water at a temperature not
over 85°F and under suction conditions as specified
in the contract.
To aid in calculating pump performance, the following
test information and definitions are included for
reference.
NOTE: Complete procedure for testing pumps
is given in the "Hydraulic Institute Standards"
Centrifugal Pump Section.
Gauge datum
The datum for all gauge readings is taken as the
centerline of the pump shaft for all horizontal shaft
pumps and as the eye of the impeller for vertical
pumps.
Head measurement
The unit for measuring head should be feet;
therefore, all pressure readings of the pumped
liquid should be converted to feet. The relationship
between a pressure expressed in pounds per square
inch (psi) and that expressed in feet of head is:
Head in feet = psi x 2.3
Where sg =specific gravity of the liquid pumped
Where sg = 1.0 for water at 60°F
sg
