Goulds Pumps 3408 - IOM - Manual (Page 26)

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3408 IOM 03/99
STARTING
1. Close drain valves.
2. Open fully all valves in the suction and discharge
lines.
3. Turn on seal water to the stuffing box. (If pumped
fluid is dirty or if leaking of air is to be prevented,
these lines should be always left open.)
4. Prime the pump.
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. Start the pump driver (turbines and engines may
require warming up; consult the manufacturer’s
instructions).
6. When the pump is operating at full speed, check
to see that the check valve has opened up. Check
valve must open 5 seconds or less after start-up
to prevent damage to pump by operating at zero
flow.
7. Adjust the liquid seal valves to produce the
recommended pressure for either the mechanical
seal or packed stuffing box.
OPERATIONAL CHECKLIST
1. Driver/Pump Rotation
Check rotation each time the motor leads have
been disconnected. Be sure that the driver
operates in the direction indicated by the arrow on
the pump casing. Rough operation and extreme
vibration can result if the pump is operated in the
wrong direction.
2. Stuffing Box Adjustment
Make stuffing box packing gland and lubrication
adjustments.
3. Flow
An accurate measurement of flow rate
(volume/time) is difficult in the field. Venturi
meters, flow nozzles, orifice plates, or timing the
draw down in the wet well are all possible
methods. Record any reading for future reference.
4. Pressure
Check and record both suction and discharge
pressure gauge readings for future reference.
Also, record voltage, amperage per phase,
kilowatts if an indicating wattmeter is available,
and pump speed.
5. Temperature
Check and record bearing temperatures using a
thermometer. Temperature should not exceed
180° F.
NOTE: Just because bearing housings are too
hot to touch does not mean that they are
running too hot for proper operation.
6. Vibration and Sound
The acceptable vibration level of a centrifugal
pump depends on the rigidity of the pump and the
supporting structure. Recommended values for
vibration can vary between .20 ips (inches per
second) velocity to .60 ips velocity depending on
the operating characteristics and the structure.
Refer to the Centrifugal Pump section of the
Hydraulic Institute Standards for a complete
description and charts on various pumps.
Field sound levels are difficult to measure
because of background noise from piping, valves,
drivers, gears, etc. Follow recommendations in
the Hydraulic Institute Standards.
All drains should be closed when filling the system.
Filling should be done slowly so that excessive velocities
do not cause rotation of the pumping elements which
may cause damage to the pump or its driver. The
adequacy of the anchors and hangers may be checked
by mounting a dial indicator off of any rigid structure not tied to the piping and setting the indicator button on the
pump flange in the axial direction of the nozzle. If the
indicator moves, as the filling proceeds, the anchors and
supports are not adequate or set properly and should be
corrected.