Flowserve MN - Manual (Page 14)

MN USER INSTRUCTIONS ENGLISH 71569189 11/04
Page 14 of 49
®
Always place two rings of packing below the seal
cage and the remaining rings above the seal cage.
The number of packing rings used is listed in table
6.1.8.1.
PUMP SHAFT
STUFFING BOX
HEAD
IMPELLER
PACKING GLAND
SEAL WATER
CONNECTION
SEAL CAGE
SHAFT SLEEVE
PACKING
Typical gland arrangement
The stuffing box is not packed when
the pump is shipped.
A water supply of approximately 0.113 to 0.227 m 3 /h
(0.5 to 1.0 gpm) is to be introduced to the seal water
connection to provide for packing lubrication and
sealing. A steady "trickle" of water from the stuffing
box will indicate proper adjustment. The sealing
water supply pressure should be 0.35 to 0.69 bar (5
to 10 psi) above the pump discharge pressure.
When grease sealing is used, a similar grease
pressure should be maintained. A slight leakage of
liquid from the stuffing box is to be expected and the
gland MUST NOT be tightened to the point of
stopping the leakage.
3.3.7 Shaft seal
The mechanical seal(s) attached to the pump shaft,
seals the pumped liquid from the environment.
Gland packing may be fitted as an option. See
section 6.1.9 for mechanical seal maintenance
information.
3.3.8 Driver
The driver is normally an electric motor. Different
drive configurations may be fitted such as internal
combustion engines, turbines, hydraulic motors etc
driving via couplings, belts, gearboxes, drive shafts
etc. Fully flexible couplings are normally used for
connecting pump and drive shafts. For operating
instructions, refer to the coupling manufacturer's User
Instructions.
3.3.9 Couplings
Fully flexible couplings are normally used for
connecting pump and drive shafts. Many variations
of make and models are available. These couplings
provide compensation for angular and parallel
misalignment.
For coupling installation, operating and maintenance
refer to the coupling manufacturer's User
Instructions.
3.3.10 Accessories
Accessories may be fitted when specified by the
customer.
3.4 Performance and operating limits
This product has been selected to meet the
specifications of your purchase order. See section 1.5.
The following data is included as additional
information to help with your installation. It is typical,
and factors such as temperature, materials, and seal
type may influence this data. If required, a definitive
statement for your particular application can be
obtained from Flowserve.
3.4.1 Operating limits
Pumped liquid temperature
limits *
5 ºC (40 ºF) to +80 ºC (176 ºF)
Maximum ambient
temperature *
5 ºC (40 ºF) to +40 ºC (104 ºF)
Maximum pump speed refer to the nameplate
*Subject to written agreement from Flowserve. Special designs
and materials may be available for pumps operating above and
below these specified limits. Contact Flowserve for upgrade
options available for your specific application.
3.4.2 Pump and impeller data
Details such as impeller diameter, wearing ring
diameter are normally provided along with the test
curves. If not provided with the pump
documentation, please contact Flowserve.