Goulds Pumps 3409 - IOM - Manual (Page 29)

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
!
Do not insulate bearing housings as this can result
in excess heat generation, sparks, and premature
failure.
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.
SHUTDOWN
The following steps will take care of most normal
shutdowns of the pump, i.e. maintenance. 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 the sections on storage and freeze
protection.
1. Shut down the driver. (Consult manufacturer’s
instructions for special operations.)
2. Close suction and discharge valves.
3. Close seal liquid valves. (If pumped liquid is dirty, or
if leakage is to be prevented, these lines should always
be left open, except when the pump is completely
drained.)
4. Open drain valves as required.
3409 IOM 11/04
29