SAMCO CP7, Instructions Manual

Page: 21 / 61

21
Check and record both suction and discharge pressure gauge readings for future reference. Also
record voltage, amperage per phase, and kilowatts if an indicating wattmeter is available.
6. Temperature:
Check and record bearing temperatures using a thermometer. Temperature should not exceed 82°
C. See Section VI, C for further information.
7. 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 0.20 ips velocity to 0.60
ips velocity depending on the operating characteristics and the structure. Refer to the current
edition 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, driver, gears,
etc. Follow recommendations in the
Hydraulic Institute Standards,
current edition.
E. SHUTDOWN:
The following steps 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 "Storage", Section IV, B and "Freeze Protection", Section V, F.
1. Shutdown the driver. (Consult manufacturer's instructions for special operations.)
2. Close suction and discharge valves.
3. Close seal water valves. (If pumped liquid is dirty, or if inleakage is to be prevented, these lines
should always be left open, except when the pump is completed drained.)
4. Open drain valves as required.
F. FREEZE PROTECTION:
Pumps that are shutdown during freezing conditions should be protected by one of the following methods.
1. Drain the pump; remove all liquid from the casing and seal cavity.
2. Keep fluid moving in the pump and insulate or heat the pump to prevent freezing.
NOTE: If heat is used to keep the pump from freezing, do not let the temperature rise above 65° C.
G. FIELD TESTS:
Performance curve:
A typical performance curve for a specific pump can be obtained from an S.A.M. Engineering Sales
Representative. This can be used in conjunction with a field test, if one is required. All S.A.M.
Engineering 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 test when
handling, clear, fresh water at a temperature not over 30°C.
To aid in calculating pump performance, the following test information and definitions are included for
reference.