Flowserve Byron Jackson Type M - Manual (Page 15)

® Byron Jackson Double Mechanical Seal Submersible Pumping Unit • 1042.293/9 • June 04
Page 15 of 68
3.3 Performance and operating limits
3.3.1 Normal operating conditions
Operating purpose
Submersible pumps serve to transport water under
the operating conditions described in the following.
CAUTION Other uses, operating purposes or
operating conditions must be
agreed upon by Flowserve.
Water characteristics
•
Water temperature: .............See Chapter 12.2
"Data sheet"
•
Sand content: ......................Maximum 25 mg/l
Also see Chapter 3.4.3 "Development of the
well", Page 16, and Chapter 3.4.5 "Effect of
pumping sand", Page 16.
•
No impurities which could lead to deposits
and blockages within the pump or to deposits
on the motor surface.
Also see Chapter 3.4.6 "Effect of air or gas",
Page 16 and Chapter 3.4.7 "Oxidizing and
corrosive effects of chemicals, air and gases",
Page 16.
•
No occurrence of water hammer
CAUTION At higher surrounding temperatures
and/or lower flow velocities on the
external motor surfaces, or if there
is risk of clogging, special meas-
ures for heat dissipation are re-
quired.
Inform Flowserve of the surround-
ing conditions.
Flowserve will check the suitability
of the pumping unit for its planned
application and confirm its use, if
applicable.
Pumping unit
•
Correctly selected and adjusted motor protec-
tion
Operation
•
Operation within prescribed voltage tolerance,
see Chapter 12.2 "Data sheet"
•
No operation against closed slide valve
•
Permissible operational range: 50 % to 120 %
of the optimal delivery rate
•
Observation of the maximum permissible
starting frequency
Installation position
Take the following criteria into account when de-
termining the installation position and depth:
•
Vertical installation in a well above the filter
line, so that a perfect flow is guaranteed along
the external motor wall.
•
Sufficient water cover
•
A static water level at least 2 m above the
pump exit
•
A dynamic water level above the suction
housing, taking into account the required net
positive suction head for the pump (see Chap-
ter 12.2 "Data sheet")
•
Flow rate (see Chapter 12.2 "Data sheet")
•
Supply conditions of the pumping medium
(dependent upon the installation conditions)
CAUTION The pumping unit should be in-
stalled above the well filter.
If this is not possible, prevent direct
suction within the filter line by suit-
able measures (e.g. blind tube in
the filter, outer pump mantle, pump
with sand protection jacket.
3.3.2 Design changes
Alternation or addition of the pumping unit may
only take place
•
by Flowserve, or
•
after written consent by Flowserve.