pdf/L800-liquid ring vacuum pumps and compressors

L_Series
L_800
Two Stage Liquid Ring Vacuum Pumps

L_800 Reliability with higher vacuum performance
In 2002, The Nash Engineering Company in the USA and elmo
vacuum technology GmbH, a Siemens subsidiary in Germany,
united to form nash_elmo Industries.
Our L_800 liquid ring vacuum pumps were created specifically for
the chemical, petrochemical and power industries. They combine
the highest standard of reliability with a new level of ingenuity.
nash_elmo utilizes advanced design technologies to achieve
optimum capability.
The multidisciplinary design process relied on input from R&D,
manufacturing, marketing and most importantly our customers –
power and chemical process engineers. The result: a revolutionary
line of pumps tough enough to be branded nash_elmo.
Durability and operating safety are important aspects. All L_800 vacuum
pumps incorporate a simple modular concept with interchangeable
parts that result in a high level of adaptability.
Applications
■ Condenser Air Extraction
■ Crystallization
■ Distillation
■ Drying
■ Evaporators
■ Metallurgical processing
■ Reactor service
■ Solvent recovery
■ Sterilizers
... and many others
cfm 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200
TC 11
TC 7
TC 5
L_800 Capacity range
The capacity range is for dry air with 60°F (15°C) seal water. Cooler
seal water will result in higher capacities.
Capacities for gas mixtures saturated with condensable vapor will
be higher than shown by these curves.
TCM 3
TCM 2
TCM 1
m 3 /h 0 500 1000 1500 2000 2500 3000 3500
2 nash_elmo Industries L_800

Two stage conical vacuum pumps
The L_800 are highly reliable and efficient vacuum pumps. These
pumps with their integral two stage rotors are able to condense vapors
that come off the process and to recover or dispose of them.
Suitable for low pressure applications
The L_800 are designed to operate at very low suction pressure
levels (less than 10 torr) with low vapor pressure seal liquids.
In many applications this translates into considerable operational
savings by reducing the number of stages on hybrid systems.
For example, a three stage jet system with glycol as motive and
seal liquid can be reduced to a two stage system.
Material and mechanical seal options
The L_800 pumps can be supplied in cast iron, ductile iron or
stainless steel construction to meet your process requirements.
Single mechanical shaft seals are provided as standard in the
stainless pumps. However, all L_800 pumps can be fitted with
single or double, cartridge or non-cartridge mechanical seals.
ISO 9001:2000 and ATEX compliant
Our L_800 two stage vacuum pumps are manufactured to
ISO 9001:2000 standards and are ATEX compliant. They are backed
by more than 100 years of experience and a global service network.
Our commitment to excellence and customer service extends from
manufacturing and installation to technical assistance and beyond.
We are fully staffed with an excellent sales force and engineering
expertise to provide total and timely support for all your vacuum needs.
nash_elmo Industries L_800 3

L_800 Performance at a glance
nash_elmo also designs and develops solutions
engineered to your individual needs.
Typical multistage hybrid systems include:
■ air ejector / liquid ring
■ steam ejector / liquid ring
■ alternative motive fluid driven ejector / liquid ring
■ rotary lobe blower / liquid ring
Contact us for further details.
Fixed bearing
end bracket
Fixed bearing
end head
2nd stage
rotor
Floating bearing
end cone
Gas inlet
Gas and
compressant
outlet
Body
1st stage
rotor
4 nash_elmo Industries L_800

Features
Integral two stage impeller
V-belt or flexible coupling drive
Offered in ductile iron or in stainless steel
Shrouded rotor blades
Single or double mechanical seals available
No interstage manifold
Benefits
High reliability; can attain high vacuum
without additional components
Numerous installation options
High durability and corrosion resistance
Strength and reliability
Ability to select the proper sealing option
Simple piping
L_800 Dimensions
C
A
B
Floating bearing
end head
Direct drive
Model A B C Suction flange Discharge flange
connections connections
inches mm inches mm inches mm inches mm inches mm
TCM1 17 430 57 1450 19 480 2 50 2 50
TCM2 23 585 66 1675 22 560 2 50 2 50
TCM3 23 585 68 1725 22 560 2 50 2 50
TC5 26 660 72 1830 27 685 4 100 3 75
TC7 28 710 84 2140 30 760 6 150 4 100
TC11 47 1195 152 3860 54 1370 8 200 6 150
C
Drive shaft
Floating bearing
end bracket
A
B
V-belt drive
Model A B C Suction flange Discharge flange
connections connections
inches mm inches mm inches mm inches mm inches mm
TCM1 40 1015 31 785 21 535 2 50 2 50
TCM2 55 1395 43 1090 24 610 2 50 2 50
TCM3 55 1395 43 1090 24 610 2 50 2 50
TC5 55 1395 46 1170 28 710 4 100 3 75
TC7 70 1780 56 1420 33 840 6 150 4 100
TC11 85 2195 70 1780 50 1270 8 200 6 150
All dimensions are approximate.
nash_elmo Industries L_800 5

The functional principle of an L_800 vacuum pump
The L_800 feature a robust compact two stage design with just one impeller and an integrated
interstage manifold. As shown below the gas enters the 1st stage through the cone inlet port 1.
It is precompressed to the interstage pressure 2 and leaves the 1st stage through the internal
manifold which leads to the 2nd stage of the pump 3. In the 2nd stage the gas is compressed
to the discharge pressure and exits through the cone discharge port 4.
1 Inlet 2 1st Stage 3 2nd Stage 4 Discharge
gas path
cone
rotor (impeller)
pump body
pump head
6 nash_elmo Industries L_800

Commitment, reliability and worldwide support
For 100 years, we have been assisting our customers in making the right vacuum
pump or compressor choice. As your engineering partners, we will provide you with
a nash_elmo performance analysis which includes a review of your particular process
requirements, and provides you with alternative means for meeting your process
needs. We will supply engineering data and application information, along with
short- and long-term cost comparisons.
Beginning today and throughout the life of every nash_elmo system, our engineers
are ready to support you to meet your vacuum and compressor process tasks.
Factory tested
Before any nash_elmo vacuum pump is shipped out of our factory, it is performance
tested to meet the highest standards. We stand behind our products: every nash_elmo
L_800 pump comes with a TWO-YEAR WARRANTY. Our new test bay gives us the capability
to simulate nearly all real operating conditions for liquid ring pumps.
A global service network with local support
nash_elmo maintains service centers strategically located throughout the United States,
Europe and Asia. Each center is staffed by specialists with considerable application
know-how. They have original factory replacement parts in stock and are equipped
with the tools, fixtures and special machinery necessary for pump and compressor
repair. The nash_elmo commitment to service extends to its regional distribution centers
and retailers. Stocked with inventories of factory parts and purchased components,
our distribution centers can deliver pumps and parts anywhere, any time. We are also
able to service vacuum pumps and compressors of other makes and models.
A new company, a unified vision
nash_elmo is more than a new company. It is the fusion of global leaders in the
development, design and application of vacuum and compressor system technology.
Our combined resources give us the ability to provide the best solution to any industrial
need virtually anywhere in the world. We are a company with an extensive range of
products and services and an unmatched reputation for reliability. Because nash_elmo
is a company with the resources to turn the most ambitious vision into reality and to
put that vision to work for you.
nash_elmo Industries L_800 7

Other nash_elmo product lines
L_Series:
Liquid Ring Pumps
Robust technology for the highest demands and varied applications
Machines in the L_Series distinguish themselves through low operating
temperatures and are suitable for handling splash water, steam
and condensates. They were developed for the toughest applications
and can safely and reliably extract or compress even explosive gas/
steam mixtures (ATEX-certified). Selection of a suitable operating
liquid enables the L_Series vacuum pumps and compressors to be
optimally integrated into processes. Thanks to their low operating
costs and extensive performance range up to 37,000 m 3 /h
(22,000 cfm), they excel in any application.
G_Series:
V_Series:
Gas Ring Blowers
Vane Pumps
D_Series: Dry Pumps
nash_elmo Industries
www.nash-elmo.com
info@nash-elmo.com
Corporate Headquarters
Trumbull, CT USA
9 Trefoil Drive
Trumbull, CT 06611-1330
Tel.: +1 800 553 6274
Proven, reliable and extremely quiet
Whether vacuum pumps, compressors or systems for conveying air,
gases or air/gas mixtures, the extensive range of products in the
G_Series meets the widest range of requirements. Thanks to their
variable voltage motors, many are usable anywhere in the world
without the need for conversion. In addition to their compact construction,
full UL/CSA certification and innovative design, G_Series
pumps and compressors offer a comprehensive power range up to
2,500 m 3 /h (1,470 cfm), maximum power density and a wide selection
of accessories, including frequency converters.
Simple design for varied applications
The vane pumps in our V_Series are known for their robust design,
easy handling and long service life. Furnished with an extremely
sturdy metal coating as well as installation- and service-friendly
plug & play functionality, these high performance machines are
extremely quiet in operation, and can meet even the most challenging
industrial demands while covering an impressive performance
range up to 4,000m 3 /h (2,350 cfm) and 10 bar g (145 psig).
High reliability with low operating costs
The dry-running vacuum pumps in our D_Series are explosion-proof
and were specially developed for production processes involving
sensitive materials. Throughout the entire process, they operate
condensation-free – and therefore corrosion-free – because there
are no operating fluids to mix with the process gases. As a result,
discharge gases can simply be collected and/or returned to the process.
There are no waste products. In addition, all pumps in the D_Series
are highly efficient and provide a constant suction capacity over an
extremely wide range of pressures with a performance range up to
to 2,200 m 3 /h (1,300 cfm).
European Headquarters
Nuremberg, Germany
Katzwanger Straße 150
D-90461 Nürnberg
Tel.: +49 911 1454 0
Order-No: VNE:B-PB016-A2-EN
Printed in Germany
Dispo 27801
2238/023 6.0 / 04-2004
© 2004 All rights reserved
HENNIG · Nbg All illustrations are non-binding · All dimensions are approximate · Subject to technical modifications