CHTR - Centrifugal, high-pressure, multistage barrel pump to API

CHTR - Centrifugal, high-pressure, multistage barrel pump to API 610 8th edition
Setting processes in motion with high pressure.
Whether small capacities against high pressures or large capacities against medium pressures - KSB's pump
type CHTR are adaptable to the various processes. Modular design allows four sizes with up to 18 stages to be
selected. KSB's know-how in hydraulics, rigid pump shafts and long inter-stage bushings and wear rings
providing hydrostatic supporting forces make it possible to build reliable pumps with large numbers of stages.
Maximum efficiency
It is possible to combine two
special impeller configurations
with six diffuser configurations
for each pump size. In total, we
have more than 30 hydraulic
configurations. The hydraulic
duty points are so finely
distributed and the impeller
profiles have special cut-down
characteristics such that an
optimum efficiency will be
available for every need. The
modular design enables
optimization of pumps with
regard to :
- power consumption
(efficiency)
- initial costs (number of stages)
- NPSH-value
H
5.0
5.1
5.2
- lower power consumption
- higher initial costs
0pt
H
5.2
5.1
5.0
- higher power consumption
- lower initial costs
Design Features
Antifriction Bearings
- Ring oil lubrication
- Provision for purge mist lubrication on request
- Water cooled bearing housing
Fan cooling on request.
Drive end bearings
- Can be dismantled without disturbing motor /
pump piping connections.
Seal casing execution
with or without cooling as per
requirement
Heavy duty thrust bearing design
- With force lubrication for higher loading/speed
- Special design to provides self alignment feature
for main loaded bearing
Impeller without locking ring
(Optional)
Pressure casing components
Designed as per guidelines of ASME Sec. VIII Div. 1
Strong Bearings
- The residual axial thrust
is absorbed
- The pump rotor is fixed in
axial position by means
of antifriction or segmental
thrust pad bearings
Optimised balancing piston
- Designed to minimise
axial thrust loading on
bearing and for longer life
Impeller
located individually and
locked in the direction of
normal axial thrust
design to API 610.
Flange designed to meet
flange loading requirement
as per API 610
Flange ratings
to discharge pressure
on request
Seal cavity dimensions
to API 610/8 Table 2.3
Design to meat discharge
pressure rating criteria
(API 610/8 Clause 2.2.4) on request
Sleeve bearing design
- For higher life and
reduced vibrations
- Bearing checking or
replacement without
dismantling the driver
CHTR
Process specific pump design
Ensuring functional
reliability
CHTR-pumps are designed in
such a way that even upset
process conditions cannot disturb
their smooth operation. The
forces and moments acting on
the pump nozzles, due to
temperature changes in the
piping system, do not cause any
problems. KSB pumps have
built-in safety margins and good
emergency running
characteristics.
Fulfilling specific process
requirements
Particular process requirements
are usually well defined for each
individual pump. The demands
made on a process pump that
keeps a process going by
operating year after year round
the clock are different from the
requirements, for example, on a
fuel pump running only
periodically at short intervals.
In the one process, liquid gases
are circulated at extremely low
temperatures, in the other,
hydro-carbons with
temperatures up to 4000C/7520F
must be handled. Process pumps
must cope with e.g. seawater or
acids just as well as with abrasive
quartz particles or cat-fines from
crack plants.
Suction impeller
minimizes site
investments
In order to minimize the NPSH
value of the pump it is possible
beside the normal hydraulics - to
provide single-suction or doublesuction impellers.
This reduces plant construction
costs.
Selection chart
3000
For major
applications in
60 Hz
2500
2000
/15
1500
H
m
1000
/13
/16
/15
/14
/13
/12
/11
/10
/9
/8
/18
/17
/16
/14
/12
/11
/10
/9
/10
/11
/10
/9
/9
/5
/8
/7
600
/6
/5
/4
/4
/3
/5
/6
/6
/7
- Water injection
/6
/7
/7
- Petrochemical Industries
/7
/8
/8
/6
800
- Refinery
/12
/5
/4
/4
/3
- Steam generation
- Sea water
/3
Operating Data
/5
/4
400
/3
CHTR 2
200
4
2500
6
8
10 Q l/s 15
CHTR 3
20
CHTR 4
40
60
80 100
150
/16
/14
200
300 400
1500
H
m
1000
/15
/18
/17
/16
/15
/14
/13
/12
800
600
/16
/11
/13 /14
/12
/11
/10
/9
/7
/7
/6
/6
/5
/5
/4
/4
/3
/3
/8
/10
/7
/9
/6
/7
/10
/9
/13
/12
/11
/10
/9
/13
/12
/10
/9
/8
/11
/8
/11
/15
/8
/7
Head *
H up to 2500 m
Temperature t -60 to + 4500C
Pump
discharge
pressure
pd up to 250 bar
Speed
n up to 7000 1/min
* with Q = 0 and ρ = 1 kg/dm3
/6
/8
Q up to 400 l/s
(14503m/h)
CHTR 6
50 Hz
2000
/5
/4
/3
/5
/6
400
/4
/5
CHTR 2
200
CHTR 5
Flow rate
4
6
8
10
15
CHTR 3
20
Q l/s
CHTR 5
CHTR 4
40
60
80 100
CHTR 6
150
200
300 400
Resistant materials
A large variety of standard materials complying with national and international standards is available. For
special service, e.g. corrosive media, KSB developed particularly resistant composite materials. CHTR-pumps
may also be built of erosion-resistant steel. Because of KSB's extensive experience with different alloyed
materials, KSB can solve any pumping problems in the best possible way.
KSB has it's own foundries working with the latest pattern making & casting methods.
Materials CHTR
API 610/8 class
S-6
C-6
A-8#
D-1#
Major Components
Barrel / Stage Casings
C - Steel
Impellers / Diffusers
AUS SS
Duplex
Cr - Steel
Cr-Ni Steel
AUS SS
Duplex
Cr - Steel
AUS SS*
Duplex*
Impeller & stage casing
wear rings / bushings
Shaft
Cr - Steel / Cr-Ni Steel
Shaft sleeve (mech. seal)
# On special request
* With hard coating
AUS SS*
AUS SS*
Duplex*
Duplex*
Notations :
C - Steel
Cr Steel
Cr-Ni Steel
Carbon steel
Chromium steel
Chromium Nickel steel
AUS SS
Duplex
Austainitic stainless steel
Duplex stainless steel