Flowserve CPXV fitted with Mark 3 ASME hydraulics - Manual (Page 12)

CPXV with Mark 3 ASME hydraulics ENGLISH 71569291 12-14
Page 12 of 44
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3 DESCRIPTION
3.1 Configurations
The pump is a modular designed centrifugal pump
that can be built to achieve almost all chemical liquid
pumping requirements.
3.2 Name nomenclature
The pump size will be engraved on the nameplate
typically as below:
Impeller drive size
3K10 X 8CPXV-16HRV
Casing nominal suction
size in inches
Casing discharge size in inches
CPXV lineshaft configuration
Nominal maximum impeller diameter in inches
H = this pump is designed for a higher flow capacity than another
pump with the same basic designation. (Examples: 4X3-10 and
4X3-10H; 6X4-10 and 6X4-10H; 10X8-16 and 10X8-16H)
HH = this pump is designed for a higher head than another pump with
the same basic designation. (Example: 4X3-13 and 4X3-13HH)
HC = this pump bottom wet end is made from very hard high
chrome and the impeller is always an OP
A = this pump has been redesigned from an earlier version. The
impeller and casing are no longer interchangeable with the
earlier version
RV = Reverse vane type impeller
OP = Open impeller
The typical nomenclature above is the general guide
to the CPXV configuration description. Identify the
actual pump size and serial number from the pump
nameplate. Check that this agrees with the
applicable certification provided.
3.3 Design of major parts
3.3.1 Pump casing
The pump casing is designed for operation when
submerged in the sump liquid. It is from the ASME
B73.1 hydraulics series with inch studs.
High chrome iron casing has a much
reduced pressure rating of 12.6 bar (183 psi).
3.3.1.1 Agitation system
This option is on high chrome iron/tungsten carbide
coated casings.
3.3.2 Impeller
Depending on the wet end hydraulic, the impeller is
either reverse vane or open. (High Chrome iron is
only open.)
Drive size: 3K = Group 3, 2K = Group 2, 1K = Group 1.
3.3.3 Shaft
The shaft has a keyed drive coupling. It is supported by
rolling bearing(s) above the sole plate and journal
bearing(s) below.
3.3.4 Bearing housing
The bearing housing enables adjustment of impeller
face clearance on the impeller via the bearing carrier
jacking screws. High temperature pumps have a
cooling fan above the pump thrust bearing housing
and a heat sink disk fan below the pump thrust
bearing but above the sole plate shaft seal.
3.3.5 Pump bearings and lubrication
The pump is fitted with a thrust type ball bearing that
may be configured differently dependent on use.
The thrust bearing(s) may be grease or oil lubricated
depending upon the application.
The journal (line) bearings may be lubricated by
product or from an external source depending upon
the application.
3.3.6 Sole plate shaft seal
The modular design enables one of a number of
sealing options to be fitted. The option of a rigid
coupling below the thrust bearing and above a
mechanical seal provides back-pull-out servicing of
the mechanical seal; removing the motor extends the
back-pull-out feature to the thrust bearing.
3.3.7 Driver
The pump is normally driven by a flange mounted electric
motor. An air or hydraulic motor may be utilized.
The position of the terminal box can be changed by
rotating the complete motor. To do this, remove the
fasteners from the motor flange, rotate the motor and
re-fit the fasteners.
3.3.8 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 the 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.