L_800Two Stage Liquid Ring Vacuum Pumps

L_Series

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.

L_800 Reliability with higher vacuum performance

Applications

� Condenser Air Extraction

� Crystallization

� Distillation

� Drying

� Evaporators

� Metallurgical processing

� Reactor service

� Solvent recovery

� Sterilizers

... and many others

2 nash_elmo Industries L_800

m3/h

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200

TC 11

TC 7

TC 5

TCM 3

TCM 2

TCM 1

cfm

0 500 1000 1500 2000 2500 3000 3500

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.

nash_elmo Industries L_800 3

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

4 nash_elmo Industries L_800

Fixed bearing

end bracket

Gas and

compressant

outlet

Fixed bearing

end head

2nd stage

rotor

1st stage

rotor

Body

Floating bearing

end cone Gas inlet

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.

A

C

B

nash_elmo Industries L_800 5

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 50TCM2 23 585 66 1675 22 560 2 50 2 50TCM3 23 585 68 1725 22 560 2 50 2 50TC5 26 660 72 1830 27 685 4 100 3 75TC7 28 710 84 2140 30 760 6 150 4 100TC11 47 1195 152 3860 54 1370 8 200 6 150

A

C

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 50TCM2 55 1395 43 1090 24 610 2 50 2 50TCM3 55 1395 43 1090 24 610 2 50 2 50TC5 55 1395 46 1170 28 710 4 100 3 75TC7 70 1780 56 1420 33 840 6 150 4 100TC11 85 2195 70 1780 50 1270 8 200 6 150

Features Benefits

Integral two stage impeller High reliability; can attain high vacuum

without additional components

V-belt or flexible coupling drive Numerous installation options

Offered in ductile iron or in stainless steel High durability and corrosion resistance

Shrouded rotor blades Strength and reliability

Single or double mechanical seals available Ability to select the proper sealing option

No interstage manifold Simple piping

Floating bearing

end head

Drive shaft

Floating bearing

end bracket

L_800 Dimensions

All dimensions are approximate.

6 nash_elmo Industries L_800

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

nash_elmo Industries L_800 7

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 cen-

ters 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.

Commitment, reliability and worldwide support

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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

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

Other nash_elmo product lines

L_Series: Liquid Ring Pumps

D_Series: Dry Pumps

Robust technology for the highest demands and varied applications

Machines in the L_Series distinguish themselves through low opera-

ting 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 m3/h

(22,000 cfm), they excel in any application.

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 con-

struction, full UL/CSA certification and innovative design, G_Series

pumps and compressors offer a comprehensive power range up to

2,500 m3/h (1,470 cfm), maximum power density and a wide selec-

tion 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 chal-

lenging industrial demands while covering an impressive perfor-

mance range up to 4,000m3/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 m3/h (1,300 cfm).

V_Series: Vane Pumps

G_Series: Gas Ring Blowers