PUMPING PERFORMANCE - Wood Group

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PUMPING PERFORMANCE
Vertiflo Pump
Energy efficiency,
protection against plant
upsets, and ease of
maintenance are key
improvements in the
latest generation of
process pumps
Recent strong activity in the
global chemical process industries
(CPI) has brought good
news for pump manufacturers,
among other equipment vendors.
“There’s tremendous growth in the
chemical, petrochemical and oil and
gas markets, and business for us is
good,” says Dave Flinton, product &
marketing manager with ITT Goulds
Pumps (Seneca Falls, N.Y.).
But both engineering contractors
and pump end-users are demanding
more for their money in terms of
reduced pump-lifecycle costs, Flinton
points out. For API 610 centrifugal
pumps such as Goulds’ Model
3700 (photo), one way to do this is to
broaden the range of impeller and casing
sizes so that the best efficiency
point (BEP) of each pump can be more
closely matched to the actual operating
conditions.
Accordingly, Goulds has recently
made available eight new hydraulic
combinations for the Model 3700,
with a further 17 or so to come later
this year. “Energy is a big portion of
the cost of owning a centrifugal pump,
especially the high-horsepower machines
found in the oil and gas market,”
Flinton says. “By dramatically
increasing the density of our coverage,
we will more often be able to provide
our customers with the optimum selection
for efficiency.”
For engineers seeking a similarly
wide range of hydraulics in ISO
pumps for chemical service, the CPX
Opti-Valve
This pump protection kit includes a temperature,
pressure or current sensor,
solenoid valve and bypass flow orifice
from Flowserve Corp. (Dallas, Tex.) is
available in 40 sizes, and in materials
ranging from ductile iron to titanium.
The CPX and Flowserve’s Mark 3
ANSI B73.1 pump are both available
in a wide range of configurations, including
mechanically sealed, dynamically
sealed, low-flow, self-priming,
vertical-sump and recessed-impeller
versions. Available flowrates are up
to 1,680 m 3 /h, heads up to 300 m, and
temperatures from –80°C to 370°C.
All CPX pumps share the same hydraulics,
sealing options, and bearingframe
options, thereby minimizing
spares inventory requirements.
To avoid problems with insufficient
suction, lifting fluids from sumps and
boreholes is often best done with a
purpose-designed centrifugal pump.
Vertiflo Pump Co. (Cincinnati, Ohio),
offers its Series 900 vertical sump
pump for pit depths up to 7.9 m, heads
up to 52 m, and flowrates up to 100 l/s.
The Series 900 (photo) is designed for
dirty fluids and minimal maintenance,
ITT Goulds Pumps
A wide choice of
hydraulic sizes makes the
Goulds Model 3700 (left) energy-efficient;
sump pumping with Vertiflo (top right)
Fluid Components International
A single no-moving-parts sensor for
flow, level and temperature protects
against overheating and dry running
says the company, and is available in
316 stainless steel.
High-pressure pumps for boiler feed
water, reverse osmosis, chemical injection
or seal flushing include plunger
types, multi-stage centrifugals of various
kinds, and very-high-speed singlestage
centrifugals such as the Sunflo
series from Sundyne Corp. (Arvada,
Colo.), whose impellers run at 6,000–
32,000 rpm. An alternative to these is
the SPS, a novel multi-stage, horizontal
centrifugal design developed from
submersible borehole pumps by Wood
Group ESP (Houston, Tex.). According
to SPS general manager Neil Ferrier,
the pumps’ oil-industry heritage
makes them very reliable, so maintenance
costs are lower than those for
plunger pumps, while their capital
costs are lower than those of split-case
centrifugal pumps.
An SPS pump contains up to 400 radial
or mixed-flow impellers on a single
horizontal shaft. Flowrates are up
to 2,000 gal/min, and discharge pres-
ChemiCal engineering www.Che.Com april 2007 33

Newsfront
sures up to 6,000 psi. “We did think the
length of the pumps might be a problem,”
Ferrier admits, “but there has
been a lot of interest from refineries,
even if they have to be installed along
walkways.” So far, six refineries have
bought the pumps. Fluids pumped include
wash water for desalting, and
light hydrocarbons.
Although many manufacturers
these days offer magnetically coupled
and canned-motor pumps, one of the
pioneers in this market is Hermetic-
Pumpen (Gundelfingen, Germany and
Humble, Tex.), which has delivered
more than 120,000 such units. At the
beginning of March Hermetic took
over sister company Lederle (Gundelfingen,
Germany), which specializes
in liquid-ring vacuum pumps and
rotary piston pumps.
Another canned-motor specialist,
Hayward Tyler Inc. (Colchester, Vt.),
recently delivered a canned-motor
pump and spare motor together worth
DON’T DISCOVER THAT YOUR
PROTECTION IS INADEQUATE —
DEPEND ON FIKE for engineered,
proven solutions.
Blackmer
34 ChemiCal engineering www.Che.Com april 2007
$520,000 to a U.S. specialty chemical
manufacturer. The pump will handle
1,4-dimethyl cyclohexanedicarboxylate
(DMCD) saturated with hydrogen
at 1,850 psi and up to 500°F, and will
run continuously for 18 months between
catalyst changes.
Wanner Engineering (Minneapolis,
Minn.), a firm noted for its Hydra-Cell
positive displacement pumps, recently
introduced magnetically coupled versions
of its Stan-Cor non-metallic
ANSI centrifugal pumps. The Stan-
Cor MK pumps feature an impeller
that can be replaced or trimmed without
replacing the magnetic drive. All
Stan-Cor pumps have casings made
1 - 8 6 6 - 7 5 8 - 6 0 0 4
from thick, carbon-fiber-filled Kynar,
which eliminates the permeation that
can occur with plastic-lined metal casings,
the company says.
Protecting valuable assets
While good pump design is the foundation
for low lifetime costs and reliability,
suitable control systems can go
a long way to aid both these objectives.
Version 5.0 of the PumpSmart PS200
variable-speed drive system from ITT
Monitoring and Control (Seneca Falls,
N.Y.) can cut pump energy use by up to
65%, the company says, through intelligent
control. After calibration based
on just four data points — flowrate
The IMPACT of an EXPLOSION
is COSTLY.
ProVane sliding-vane pump (left) for economical pumping at low
flowrates; the Viking RTP20 (right) for transport applications
• Engineering and application specialists
• Over 60 years of experience in safety
• Process and code compliance knowledge
• Total Explosion Protection Solutions:
- Testing - Isolation
- Venting - Suppression
V I S I T W W W . F I K E . C O M
P R O V E N S A F E T Y S O L U T I O N S F O R O V E R 6 0 Y E A R S
Circle 28 on p. 82 or go to adlinks.che.com/6894-28
Viking Pump

Larox Flowsys Moyno Watson-Marlow Bredel
Larox calls the LPP80 peristaltic pump
“the first real change in 30 years”
and power at the BEP, rated speed, provides two levels of alarm: the first
and shut-off power — the system uses when the flowrate falls below a preset
the current and frequency supplied value in the range 0.01–3 ft/s, and the
to the motor to predict flowrate to a second when the pump inlet actually
claimed accuracy of ±5% without the runs dry. The FlexSwitch FLT has no
need for pressure or flow sensors. The moving parts.
result is improved controllability, en- Detecting problem conditions is
ergy savings, and low-flow protection only useful, of course, if protective ac-
for both centrifugal and positive-distion follows. To make this as easy as
placement pumps.
possible, Opti-Valve LLC (Broomfield,
For applications that simply require Colo.) offers a package of equipment
protection against overheating, Fluid including sensor, bypass valve and
Components International (FCI; San flow-restriction orifice (photo, p. 33).
Marcos, Calif.) offers the FlexSwitch The sensor detects low flow caused by
FLT pump protection device (photo, a closed downstream valve through
p. 33). By detecting flow, level and rises in temperature or pressure, a
8152MIPad.qxd temperature, the 9/5/06 FlexSwitch 2:40 PM FLT Page drop 1 in motor current, or a combina-
• Quiet, clean
VFD controls
• Non-pulsating
flow
• Closed piping
system
• Compact heavy duty
Ultra-Drive ® gear joint design
• Twin screw feeder
• Optional slip injection system
• High-efficiency Ultra-Feed ®
rotor
Unique gear joint on the Moyno 2000
progressing-cavity pump
Moves a higher
percentage of solids
longer distances than
any other progressing
cavity pump!
Watson-Marlow Bredel’s SPX peristaltic
handles corrosive and abrasive fluids
tion of these. At this point, it opens the
bypass valve, creating a flow of liquid
large enough to stop the pump from
overheating.
To help pump users understand
hydraulics, Pump Systems Matter
(www.pumpsystemsmatter.org), an
educational initiative backed by the
Hydraulic Institute (Parsippany, N.J.;
www.pumps.org) has made its Pump
Systems Improvement Modeling Tool
(PSIM) software freely available for
download. PSIM allows users to model
pumping systems using a drag-anddrop
interface. PSIM models pump and
system curves, pump efficiency, NPSH
calculations, impeller trimming, and
Patented
1-877-4UMOYNO
www.moyno.com
Circle 61 on p. 82 or go to adlinks.che.com/6894-61
ChemiCal engineering www.Che.Com april 2007 35

Newsfront
automatic pump curve viscosity corrections,
and calculates energy costs
over time using net present value.
Positive performers
Positive displacement pumps may be
preferred over centrifugals for viscous
liquids, for low flowrates at moderate
or high pressures, when self-prim-
PumP exPerts
Barnant Co. (Thermo
Fisher Scientific) edlinks.che.com/6894-580
Bio-Chem Valve edlinks.che.com/6894-581
Bioengineering edlinks.che.com/6894-582
Blackmer edlinks.che.com/6894-583
BOC Edwards edlinks.che.com/6894-584
Bran + Luebbe edlinks.che.com/6894-585
CAT Pumps edlinks.che.com/6894-586
Flowserve edlinks.che.com/6894-587
ing is needed, and when flowrates
or system conditions change widely.
Blackmer (Grand Rapids, Mich.) recently
launched a new sliding-vane
Circle 29 on p. 82 or go to adlinks.che.com/6894-29
36 ChemiCal engineering www.Che.Com april 2007
Fluid Components
International edlinks.che.com/6894-588
Fluid Metering, Inc. edlinks.che.com/6894-589
Hayward Tyler Group edlinks.che.com/6894-590
Hermetic Pumpen
(Lederle) edlinks.che.com/6894-591
Hydraulic Institute edlinks.che.com/6894-592
ITT Goulds Pumps edlinks.che.com/6894-593
ITT Monitoring & Control edlinks.che.com/6894-594
Jaeco edlinks.che.com/6894-595
Larox Flowsys edlinks.che.com/6894-596
pump, the SX3, that is suitable for
many chemical duties, thanks to its
stainless steel construction and Duravane
carbon-filled resin vanes. External
bearings provide durability and
easy maintenance, says John Pepper,
Blackmer’s VP of sales and marketing
for North America; and the pump
can run dry for short periods without
damage. Capacity is 100–250 gal/min,
at pressures up to 125 psi.
Last year Blackmer launched a
smaller pump, the ProVane, that has
proved popular in biodiesel plants, says
Tom Stone, the firm’s director of marketing.
Available in ductile iron and
stainless steel, five sizes of ProVane
cover flowrates up to 100 gal/min. A
small rotor diameter keeps vane tip
speed down, allowing the pumps to
operate reliably at full motor speed
(1,200, 1,800 and 3,600 rpm), while
the large diameter of the product-lubricated
bearing ensures good performance
even with “dry” fluids like
methanol, pentane and liquid carbon
dioxide, Pepper says (photo, p. 34).
Waukesha Cherry-Burrell (Delavan,
Wisc.) manufactures a wide range of
pumps, including the Universal series
of twin-rotor positive displacement
pumps, which have hooked rotors;
tri-lobe rotary pumps; and centrifugal
pumps for sanitary applications.
A recent development is the Tru-Fit
gearbox, which the company says reduces
baseplate length by 20–25% and
eliminates shaft alignment problems.
Viking Pump (Cedar Falls, Iowa) has
launched a new tri-lobe positive displacement
pump for OEM transport
applications (photo, p. 34). The RTP20
can transfer up to 264 gal/min at pressures
up to 145 psi and viscosities to
55,000 cSt. A longer sealing land at
the rotor tips improves efficiency with
lower-viscosity products, says John
Stillman, director, global OEM sales.
Viking also makes internal and external
gear pumps, and vane pumps.
A specialist in progressing-cavity
(PC) pumps is Moyno (Springfield,
Ohio). The company’s Moyno 2000
pump features a unique gear joint

MAAG Pump Systems
Textron edlinks.che.com/6894-597
Moyno, Inc. edlinks.che.com/6894-598
MV Products edlinks.che.com/6894-599
Neptune Chemical
Pump Co. edlinks.che.com/6894-600
Nikkiso Pumps edlinks.che.com/6894-601
Opti-Valve LLC edlinks.che.com/6894-602
Pulsafeeder edlinks.che.com/6894-603
Pump Systems Matter edlinks.che.com/6894-604
Seybert & Rahier edlinks.che.com/6894-605
Bioengineering
This dual-diaphragm pump is designed
for aseptic feeding and metering in hygienic
applications
that provides excellent torque transmission
and control of thrust, reducing
the radial load on the drive shaft and
bearings and simplifying maintenance
(photo, p. 35). The Moyno 2000 HS system,
meanwhile, uses a G4 pump with
a twin-screw feeder as a cost-effective
alternative to piston pumps for the
transfer of semi-dry materials such as
sewage sludge.
The new LPP80 high-capacity
peristaltic pump from Larox Flowsys
(Lappeenranta, Finland) delivers
up to 176 gal/min (photo, p. 35). The
company’s design focus on minerals
processing and metallurgical applications
has resulted in a pump with exceptional
performance and reliability,
says Matti Riihimäki of Larox Flowsys
Pump Products. The pump uses a
patented roller design that is said to
generate twice as much flow per revolution
as a conventional pump, as well
as increasing hose life and reducing
energy consumption.
The SPX peristaltic pump from
Watson-Marlow Bredel (Wilmington,
Mass.) is suitable for abrasive and
corrosive fluids, thanks to its Bioprene
hose material (photo, p. 35). The complete
Watson-Marlow Bredel peristaltic
range covers flowrates up to 350
gal/min and pressures up to 230 psi.
For demanding hygienic applications,
Bioengineering (Waltham,
Sulzer Pumps edlinks.che.com/6894-606
Sundyne Corp. edlinks.che.com/6894-607
Travaini Pumps USA edlinks.che.com/6894-608
Tuthill Pump Group edlinks.che.com/6894-609
Vertiflo Pump Co. edlinks.che.com/6894-610
Viking Pump edlinks.che.com/6894-611
Wanner Engineering edlinks.che.com/6894-612
Watson-Marlow Bredel edlinks.che.com/6894-613
Waukesha
Cherry-Burrell edlinks.che.com/6894-614
Wood Group ESP edlinks.che.com/6894-615
Mass.) offers a dual-diaphragm pump
(photo). For the pharmaceutical, food
and cosmetic industries it offers accurate
and controlled flow in either
Wood Group ESP
Surface Pumps
www.woodgroup-esp.com
direction, thanks in part to the use of
positively actuated diaphragm valves.
Made from mirror-polished 316L
stainless steel and PTFE, the pump
delivers pressures up to 6 bar, has zero
dead volume, can be sterilized and
cleaned-in-place, is self-priming, and
can run dry without damage. ■
Charles Butcher
Low tolerance for pump problems?
No problem.
Pressure to lower ever-increasing maintenance
costs and reduce environmental impact has paved
the way to better surface pumping solutions.
Our multi-stage centrifugal SPS Surface Pumping
Systems provide versatile, low-maintenance
alternatives to many split-case centrifugal,
positive-displacement and vertical-turbine pump
applications. The SPS is a cost-effective solution
for processing, petroleum, mining, water and other
industries that require high-volume movement of
fluids. Proven benefits include:
• Lower initial and whole-life cost
• Short construction lead-time
• Increased reliability and runtime
• Low noise and vibration levels
• Remote monitoring and control
• Worldwide support.
Call this number: 281.492.5160.
Or e-mail sps@woodgroup.com.
SPS APPLICATIONS:
Booster
Transfer
Circulation
Injection
SP1000: rated 100 to 1000 HP
(SP2000: rated 1000 to 2500 HP
also available)
Circle 30 on p. 82 or go to adlinks.che.com/6894-30
ChemiCal engineering www.Che.Com april 2007 37
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