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A Unit of the
HERBERT OTT- GROUP
Building-block solutions forprecision fluid handling requirements
in industrial processes
Simple, versatile, adaptable
Unmatched selection
Proven reliability
LEWA modular
Metering Pumps
T H E T E C H N O L O G Y A D V A N T A G E
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Performance table
Pressure up to 1200bar
Flow rate from 1 l/h to 50m3/h
per pump head
Temperature -50 to +400C
Viscosity up to 100.000mPas
Refer to page 13 for technical data
Drive elements Five sizes in
differing power capacities
Pump heads Sealless diaphragm
or sealed plunger types
Stroke adjustments Manual,
electric, pneumatic, or fixed stroke
Drivers Electric motor in single,
multiple, or variable speed
Instrumentation A full range for
monitoring and control
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The drive elements are available
in 5 power ratings. They are easyto operate, exceptionally sturdy
and overload safe and meet the
requirements of API 675.
Over 100.000 units are in service
worldwide in a diverse range of
applications.
The integrated, compact worm gears
with different reduction ratios feature
a high efficiency and long service
intervals. A full separation of drive
element and hydraulic oil of dia-
phragm pump, the basic requirementfor continuous, zero problem, low
wear operation, is guaranteed by a
double sealing of the plunger rod.
Alternative drive element designs are
available as simplex pump without
stroke adjustment in space saving
design with the motor mounted verti-
cally and boxer designs with two
pump heads and double the flow
rate.
Advantages
Precise linear and fully
reproducible stroke adjustmentAccurate as drive torque is not
carried by the stroke adjustment
mechanism, there is minimum
adjusting force for manual setting,
and a narrow dead-band with
servo-setting devices
Flexible adjust stroke during
operation or at rest Expandable combine with other
drive elements of like or different
power ratings
Stiff no free play from shifting
of support bearings during strokeadjustment
Overload safe simply supported
beam design with no bending
loads
Efficent low energy requirements
Low life cycle costs low mainte-
nance, long service intervals, long
life
Options
Minimum footprint verticalmotor mount assembly (simplex
only)
Fixed stroke length crank
design (no stroke adjustment)
Boxer design opposed pump
heads for double the flow rate
High suction pressure design
for high system pressures
The LEWA variable eccentric
drive element:
efficient conversion of
driver rotation to precisely
adjustable reciprocating
action
The principle:
The LEWA variable eccentric
drive element is a straight
crank drive element with
direct transmission of the
drive torque from the worm
gear via the hollow shaft (1)
to the variable eccentric (2).
A sliding connection (3) to
the hollow shaft drives the
radially adjustable variable
eccentric. Axial shifting of
the skew slotted sliding shaft
radially shifts the variable
eccentric. A precisely repro-
ducible setting from zero
to the maximum stroke
length is possible via the
adjusting spindle
The LEWA variable eccentric
drive element
0
5
mmHub
10
15
1
3
2
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Drivers
Standard is an electric motor in a
selection of power supply options
and to various NEMA ratings
including explosion proof, in fixed or
variable speed. Other alternatives
include:
DC motors (also solar powered)
IC engines
Steam turbines
Variable speed transmissions
or gears Free shaft end
Instrumentation
For monitoring the pump and
interfacing it with process control
systems: speed transmitters, contactors
Drive element options to meet your
installation requirements
Manual, electric, or pneumatic
stroke adjusters can be used
in any combination in the LEWA
modular system
... to an IC engine when
electric power is not available.
Solar power is another option
Different drive element
configurations of the
LEWA modular program
Simplex drive elements Boxer drive elements
with stroke adjustment with stroke adjustment
without stroke adjustment without stroke adjustment
Stroke adjustment
Type E drive elements are variable
stroke mechanisms, adjustable: Manually,
Electrically, or
Pneumatically
Our type G drive elements are
constant stroke crank designs with-
out stroke adjustment.
Electric stroke actuators
Include modern interface and safetyfeatures such as:
Integrated limit position and
overload protection
Feedback via potentiometer or
0/4 20mA signal
Enclosures to meet most electrical
standards
Optional position controller
Pneumatic stroke actuators
0,21bar control signal
Integrated hydraulic dampening
Optional control and feedback via0/4 20mA signal
A wide selection of drivers:
from a simple asynchronous AC
motor in a suitable enclosure
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Diaphragm pump heads with
hydraulically actuated diaphragm
Low operating costs, high availa-
bility, enhanced process integrity
and consistent product quality
make LEWA diaphragm pumps
the safe choicefor many applica-
tions.
LEWA zero leakage diaphragm
pumps are proven cost-effective ina wide range of applications. The
hermetically sealed design not only
totally contains hazardous, toxic,
or abrasive fluids, but also excludes
contaminants where the process
fluid must remain pure or sterile.With
leakage eliminated, your production
continues without interruption, and
without compromises in process
accuracy to affect your end product.
Built-in safeguards assure the secu-
rity of your process: an integrated
pressure limiting valve (PLV) protects
against overload. LEWAs well-proven
diaphragm position control system
keeps the freely-oscillating dia-
phragm from damages due to pro-cess upsets such as cavitation. Full
diaphragm support in the rearmost
position eliminates damage to the
diaphragm due to overpressure.
LEWAs sandwich diaphragm with
condition monitor is standard in most
pumps. Any diaphragm perforation
is immediately signaled, while the
pump continues leak-tight, full per-
formance operation on the other
diaphragm until maintenance can be
scheduled.
Advantages of LEWA
diaphragm pump heads
High metering accuracy
pressure stiff with internal
hydraulic degassing
Zero leakage hermetically tight
Double containment sandwich
diaphragm with reliable diaphragm
condition monitor
Overload safe built-in PLV
Protected diaphragm positioncontrol system with full backup
support
Resilient can run dry without
damage
Gentle conveys sensitive fluids
without damage
Totally enclosed positive
separation of hydraulic fluid and
drive element lubricant
Low life cycle costs low main-
tenance, long service intervals,
long life
Efficient low energy require-ments
The principle:
The hydraulically balan-
ced, freely moving dia-
phragm totally contains
the process fluid (yellow)
wich is hermetically sea-
led to the environment.
How it works:
The reciprocating plunger
displaces hydraulic fluid
(dark blue) causing move-
ment of the diaphragmand a like displacement of
process fluid . LEWAs ad-
vanced diaphragm posi-
tion control system is
used for highest operating
safety. A gate valve (2)
controls the refill valve (1)
forcing the diaphragm to
be in the rearmost, fully
supported position before
any hydraulic replenish-
ment can take place,
thereby safely preventing
overfilling in any upset
condition. Likewise, anintegral pressure limiting
valve (3) with gas venting
function protects the
pump and system from
overpressure
suction stroke
discharge stroke
3
12
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The universal M 500
diaphragm pump head
Extremely wide application
range:
fully jacketed diaphragm
pump heads and valves for
handling melts
The M500 with PTFE sandwich
diaphragm solves practically any
metering application
All the security and performance
features you want in a modern
diaphragm pump head, including
LEWAs revolutionary diaphragm
position control system. The safe
selection for most services, including
difficult to handle fluids such as
suspensions and high viscosities.
Advantages of the M 500
Universal application
Clear flow path for process fluid
Suitable for virtually all fluids
Secure sandwich diaphragm with
condition monitoring system Long diaphragm life assured by
hydraulic diaphragm position
control
Safe against high suction pres-
sures (to 350bar) by full reardiaphragm support
Protected against overpressure
with built-in PLV
Packless plunger for minimum
wear and maintenance
Standard wetted material is
316Ti stainless for high corrosion
resistance
Options
Our experience with applicationspecific designs makes it possible
to meet most service requirements:
Duty-matched valve designs
Customized connection and
installation arrangements
Diaphragm condition monitoring
systems with pressure switches,
transmitters and/or gauges,
and contact pressure gauges
Heating and cooling jackets
Alternative materials of
construction
Easy clean pump heads (CIP) Hygienic designs to 3-A standards
for food, pharmaceuticals, and
biotech applications
Performance table
Pressure up to 350bar
Flow rate from 1l/h to 50m3/h
per pump head
Temperature -50 to +150C
Viscosity up to 100.000mPas
Refer to page 13 for technical data
Zero leakage and sealless:
LEWA diaphragm pump
heads are problem-free
with virtually all fluids,
including critical, toxic,
and flammable liquids
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Multiplexing is simple with
LEWAs modular system
Advantages of the M 700 series
Exceptional reliability for everyday
metering services Long diaphragm life assured by
hydraulic diaphragm position
control
Protected against mis-operation
by a patented diaphragm support
system
Secure sandwich diaphragm with
condition monitor
Protected against overpressurewith built-in PLV
Safe when operated dry, at
overpressure, or under vacuum
Packless plunger for minimum
wear and maintenance
Standard wetted material is
316Ti stainless for high corrosion
resistance
Options
Duty-matched valve designs Customized connection and
installation arrangements
Diaphragm condition monitoring
systems with pressure switches,
transmitters and/or gauges,
and contact pressure gauges
Hygienic designs to 3-A standards
for food stuffs, pharmaceuticals,
and bio-tech applications
The standard M700
diaphragm pump head
Maximum pressure vs. the temperature
of the process fluid, M700 series
Easy to live with the patented
design of the M700 pump head
protects the sandwich diaphragm
from all process upsets.
Performance limits
Max. d ischarge Max. temperature
pressure (bar)
70 60 C
60 80 C
40 100 C
20 120 C
Sterilisation up to 150C possible
Performance table
Pressure up to 70bar
Flow rate from 1l/h to 1,2m3/h
per pump head
Temperature up to +120C
Viscosity up to 500mPas
Refer to page 13 for technical data
Setting new standards for safety,
performance, and value, the M 700
is the ideal selection for everyday
metering applications up to 70bar
and 1200 l/h.
LEWA combined the proven M500
series diaphragm position control
system with a patented shape-opti-
mized diaphragm and unique front
and rear support design to providefull operational protection for
the diaphragm even under extreme
operating or upset conditions.
The pre-shaped PTFE sandwich dia-
phragm is state-of-the-art it rolls
instead of flexes, and carries a
written service life guarantee.
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Modern technology to achieve low
life cycle costs:Finite element analysis is used in
designing highly stressed parts
for reliability and long life
The performance and
reliability of theLEWA M 200/M400 is
well proven on tough
installations
For high pressures M 200/M 400
diaphragm pump heads
High performance pump heads
with metal diaphragm for high
pressures and high temperatures
Metal diaphragms are used when
pressures or temperatures exceed the
capabilities of PTFE diaphragms,
or for high diffusion resistance (e.g,
nuclear technology). For maximum
security and long diaphragm life,
the deflection of the diaphragm is
positively limited in both directions,
keeping it safely below its elasticlimit under all operating or upset
conditions. The sandwich diaphragm
is a big safety advantage at these
high pressures.
Advantages of the
M200/M 400 series
Highly reliable and safe
Exceptionally long diaphragm life
Diffusion tight sandwich
diaphragmAccepts high suction pressures
Protected against overpressure
with built-in PLV
Packless plunger for minimum
wear and maintenance
For high pressures:
The design technique of the
M200/M 400 has evolved
from years of experience and
continuous improvement
Performance table
Pressure up to 1200bar
Flow rate from 0,1 l/h to 5m3/h
per pump head
Temperature up to +200C
Viscosity up to 500mPas
Refer to page 13 for technical data
9.338-05
3.530-05
-2.278-05
-8.086-05
-1.389-04
-1.970-04
-2.551-04
-3.132-04
-3.713-04
-4.293-04
-4.874-04
-5.455-04
-6.036-04
-6.617-04
-7.198-04
-7.778-04Y
X
Z
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The basic K 100 500
plunger pump heads
One of many possible options:
total heat jacketing withaccessible valves for melts
The plunger seal selection
considers the fluid, pressure
and temperature
compression packing rings
compression packing rings
with flushing lantern
self tensioning v ring seals
with flushing lantern
Large plunger pump headsin a duplex arrangement
The principle:
The reciprocating plungerdirectly displaces the
process fluid (yellow). As
the plunger and plunger
seal are wetted, the best
performance for the
application is achieved
by optimal selection of
plunger material and seal
design
Performance table
Pressure up to 1200bar
Flow rate from 0,1 l/h to 50m3/h
per pump head
Temperature up to +400C
Viscosity up to 100.000mPas
Refer to page 13 for technical data
Plunger pump heads are a good
choice for simple applications withnon-critical, harmless fluids.
Simple, economical, and highly
accurate in services where regular
attention can be given to maintain
the performance of the seals.
Laterally adjusting plungers self-
align in the seal for lowest wear.
Standard plunger material is oxide
ceramic for optimal chemical
resistance and hardness.
Advantages of plunger pumps
Cost effective
Excellent suction lift
Minimum dead space
Options
Duty-matched valve designs
Heating and cooling jackets
Seal flushing arrangements
Alternative seals to suit the service
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ball valve
A wide selection of reliable
pump valves
Valve Materials
For standard applications, the valves
are constructed of the same material
as the pump head for cost efficiency.
For more demanding requirements
such as slurries, optimized combina-
tions of materials for the valve seat
and closing pieces are available.
Options
Double ball valves (in small sizes)
for special services
Slurry valves to various
specifications
Hardened valve components
Hard metal, oxide ceramic or
silicon nitride valve parts
Valve inserts of plastic materials Special designs
plate valve
Valves for any requirement
In addition to the pump head type,
the proper valve design is of
major importance in the suitability of
the pump for the service. LEWAs
modular program offers a wide range
of choices for the most varied appli-
cations depending on the valve
size and corresponding requirements.
Count on our decades of experience
to assure that the correct selection
of ball, plate, or cone valves areinstalled.
Ball valves
Standard valves for nominal sizes up
to15mm. Optimal flow characteri-
stics and functions reliably even with
contaminated fluids.
Plate valves
Standard valves for nominal sizes
25mm and up and pressures to
200bar. Suitable for high stroking
frequencies due to the low massof the plate.
Cone valves
Standard valves for nominal sizes
25mm and up and for high pres-
sures.
cone valve
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Correct installation and accessories
assure proper function
The trouble-free function of a
metering pump depends mainly on
correct installation for the application
and process fluid characteristics.
Properly selected and sized acces-
sories turn the pump into a func-
tional system. Your success is our
success please consider our ad-
vice. We can also offer duty-matched
accessories or a complete proven
skid system with suction and dis-
charge connections to your process.
Dirt traps (screens)
Many fluids contain contaminants
which can disrupt the function of the
pump valves ranging from minor
flow fluctuations to complete failure
of the metering process. This can
be avoided with the installation of a
strainer in the suction line. Take care
to minimize the pressure drop in
critical suction situations.
Pulsation dampeners
Metering pumps have a pulsating
flow. During each stroke, the column
of fluid in the suction and the dis-
charge lines must be accelerated
from zero to peak velocity and then
decelerated back to zero. This
creates friction losses and pressure
fluctuations due to mass accelera-
tion. Pulsation dampening can be
required for two reasons: To reduce high, non-permissible
pressure fluctuations, or
To create a high degree of flow
smoothness
The simplest and most economical
way to meet either requirement is
the use of pulsation dampeners.
The use of a multiplex pump with
phased delivery (e.g., a triplex pump
at 120phasing) will achieve a
similar result.
Safety valves
Metering pumps are positive displa-
cement devices and always must
be protected against dead-heading
if there is any possibility of blockage
of the discharge line during operation
such as sedimentation buildup in
the pipeline, accidental closure of a
shutoff valve, etc.. Safety valves
are used to prevent overload of the
pump and the system.
Hydraulically actuated diaphragm
pumps are protected by a pressure
limiting valve integral to their
hydraulic circuit. This valve can be
used to protect the system (depen-
ding upon local and plant regula-
tions) if the pump is the only pres-
sure generating device. Alternatively,
it can be set lower than the process
side safety valve due to its operation
in clean hydraulic fluid.
Back pressure valvesMetering pumps require a certain low
minimum back pressure for proper
functioning. If the suction pressure
exceeds the discharge pressure,
over-metering or flow-through
occurs. Back pressure valves solve
this problem.
Other options
To complete your metering system,
we can assist with mixing devices
(static or active), injection points,
measuring instruments (flow,temperature, pressure, conductivity,
pH value, level, turbidity, etc.), solid
feeders and dissolving equipment,
and open and closed loop controls.
M~
M~
M~
M~
Installation of a dirt trap (screen)
Typical use of pulsation dampeners
Placement of a safety valve
Fitting of a back pressure valve
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Enquiry data for selecting a pump
For selecting your specific pump we need
the information on the right from you.
Please fax to:
LEWA Herbert Ott GmbH + Co.
Fax-No. +49 (7152) 14-1303
Your enquiry will be answered immediately.
B B BL
LB
H
Foot prints
Type L LB B B H
[mm] [mm] [mm] [mm] [mm]
EK 400 650 400 140 275
EL/GL 600 1000 600 250 400
EH/GH 700 1120 750 320 660
ES/GS 1350 2050 1300 490 960
EG/GG 2000 3000 1800 717 1210
100 200 500 1000 [ml/h]
2 5 10 20 50 100 200 500 1000 [l /h]
1
2
5
10
20
50
100
200
500
1000
2000
Flow rate Qtheo per pump head at maximum stroke length
Maximump
ermiss
ibledischargepressure[bar]
1
2 5 10 20 50 100 200 [m3/h]1
EG+GG
ES+GS
EH+G
H
EL+GL
EKFC
M 200/400 + K 200
M 500
M 700
13
Technical data LEWA modular
Performance range table
For determining the drive
element size. The graphs for the
LEWA modular series apply to
a simplex pump. The flow rate
stated is per pump head.
The dimensions given may differ depending on the size and type of pump head mounted
Metered fluid
Flow rate required [l/h]
Operating pressure at discharge flange [bar] abs
Operating pressure at suction flange [bar] abs
Operating temperature (OT) max./min. [ C]
Density at OT [g /cm3]
Viscosity at OT [mPa s = cP]
Solids content /density /description [% /g/cm3]
Solids particle size /solids hardness [mm/Mohs]
Motor data
VoltageCurrent type
Rated frequency
Hazardous area protection
Enclosure
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LEWA process diaphragm pumps
Eliminate fugitive emissions with
leak-free LEWA process diaphragm
pumps for high pressure, high flow
services. No process fluid can escape
to the atmosphere. LEWA triplex
with compact monoblock drive
element and LEWA modular in varia-
ble multiplex assembly guarantee
zero leakage and low maintenance
operation.
LEWA metering systems
LEWA metering systems combine a
pump with actuator for stroke length
and/or speed, a flow meter (mass or
volume) and a controller for a
closed-loop flow metering solution.
Standard metering packages
LEWA has developed standardized
solutions for a wide range of
applications such as acid dilution,
gas odorization, cold sterilization,
polyethylene cross-linking, and
solar powered chemical injection.
Tailor-made metering packages
LEWA metering/mixing packages
support process automation and are
designed and built to meet specific
customer requirements with acomplete solution for the correspon-
ding application. The scope of supply
covers turn-key standard metering
packages up to the engineering and
commissioning of complex systems
with customized process controls,
displays, data recording and external
interfaces to the plants central
control system.
In addition to our modular series,
LEWA offers other metering pumps,
process diaphragm pumps, metering
systems and metering packages.
If you are interested in our complete
scope of supply, we would be plea-
sed to send you our comprehensive
catalog.
Cam and spring drive elements
FC for precise metering of very
low flow rates
The FC series supplements the LEWAmodular with an ideal design for very
low flows. The advantages of the
cam and spring drive are zero free
play, constant front dead center, and
excellent valve action. Both, dia-
phragm pump heads of the M200
series and plunger pump heads can
be used with the FC.
LEWA ecodos
Standard diaphragm metering pumps
for low pressure services using
a patented, mechanically actuated
four-layer PTFE sandwich diaphragm
for safety. In simplex or multiplex
configurations.
LEWA lab (not shown)
Micro-metering pumps with hydrauli-
cally actuated metal diaphragm. Main
applications are in the laboratory
and process research services in pilot
plants.
14
LEWAs wide scope of supply
Cam and spring drive element FC
LEWA ecodos
LEWA triplex process diaphragm pumps
LEWA metering systems and packages
Performance range
Flow rate from 0,1to 68 l/h
per pump headDischarge pressure up to 500 bar
Performance range
Flow rate up to 1,5 m3/h
per pump head
Discharge pressure up to 20 bar
Performance range
Flow rate up to 40 l/h
Discharge pressure up to 560 bar
Performance range
Flow rate up to 180 m3/h
Discharge pressure up to 1200 bar
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LEWA Herbert Ott GmbH+ Co
Ulmer Strasse 10
D-71229 Leonberg
Telephone +49 (7152)14-0
Telefax +49 (7152)14-1303
E-mail [email protected]
Internet www.lewa.de
LEWA and the
HERBERT OTT-GROUP:
The Herbert Ott-Group consistsof the OTT HOLDING INTER-
NATIONAL GMBH, the LEWA
producing company in Leonberg
and eight affiliated sales com-
panies in the USA, Singapore,
Brazil, Switzerland, Germany,
Austria, France and Italy.
Parallel and of equal status these
sales companies market equip-
ment complementary to LEWA
products from other, leading
manufacturers, stock complete
machines and spare parts. Also
they offer competent consultation
and qualified service locally.
USA /North and Middle America
AMERICAN LEWA, INC.
Phone +1/508/429-7403
Fax +1/508/429-8615
www.americanlewa.com
Singapore
LEWA ASIA HERBERT OTT PTE LTD
Phone +65/68617127
Fax +65/68616506
Brazil
LEWA SULAM ERICANA Ltda.
Phone +55/11/567704 66
Fax +55/11/[email protected]
Switzerland
Herbert Ott AG
Phone +41/61/7179400
Fax +41/61/7179401
www.herbert-ott-ag.ch
Germany
HOV Herbert Ott Vertriebs-GmbH + Co
Phone +49/7152/6091-0
Fax +49/7152/6091-59
www.hov.de
Austria
LEWA Herbert Ott KG
Phone +43/1/877 3040-0
Fax +43/1/8773040-29
www.lewa.at
France
POMPES LEWA S.A.R.L.
Phone +33/1/3086 7480
Fax +33/1/39570608
www.pompes-lewa.fr
Italy
POMPE LEWA S.R.L.
Phone +39/02/9358 2660/1
Fax +39/02/93582657
www.pompe-lewa.it
LEWA always close to you
