Atlas Copco AWC160 User manual

Atlas Copco
Liquid Ring Vacuum Pumps
Standard/Safe Area bare shaft
AWC160, AWC220, AWC290, AWC390
Instruction Manual
LRP200000228
Issue A

Declaration of Incorporation
We declare under our sole responsibility, as manufacturer and person within the EU authorized to
Assemble the technical file, that the product(s)
AWC160, AWC220, AWC290, AWC390,
AWS180, AWS280, AWS360,
AWS450, AWS600, AWS800, AWS1100,
AWS1300, AWS1600, AWS2500, AWS3300, AWS3800, AWS5500, AWL4500, AWL6000,
AWL7800, AWL8500, AWL10500, AWL10800, AWL13500, AWL13800, AWL15500,
AWL17500, AWL22500, AWL22800, AWL30000, AWL37500
To which this declaration relates is in conformity with the following standard(s) or other normative
document(s) and fulfills all the relevant provisions:
Directive on the approximation of laws of the Member
States relating to
Harmonized and/or Technical Standards
used
Machinery Directive
2006/42/EC
EN 1012-2:
1996+A1:2009
Restriction of Certain
Hazardous Substances (RoHS)
Directive
2011/65/EU ＆
2015/863/EU
Note: This declaration covers all product serial numbers from the date this Declaration was signed
onwards.
Atlas Copco Airpower n.v. Boomsesteenweg 957, B-2610 Wilrijk, Belgium
This product has been manufactured under a quality management system certified to ISO9001:2015
This declaration is based on the requirements of ENISO17050-1 and the relevant Directives
P200-10-149 Issue B

Atlas Copco
Liquid Ring Vacuum Pumps
Standard/Safe Area
AWC160, AWC220, AWC290, AWC390
Instruction manual
Copyright notice
Any unauthorized use or copying of the contents or any part thereof is prohibited. This
applies in particular to trademarks, model denominations, part numbers and drawings.
This instruction book is valid for CE as well as non-CE labelled machines. It meets the
requirements for instructions specified by the applicable European directives as
identified in the Declaration of Conformity.
2020-07
No. LRP200000228 Issue A
www.atlascopco.com

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4 LRP200000228 Issue A
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Instruction Manual
LRP200000228 Issue A 5
Table of contents
1Introduction.........................................................................................................................................................7
1.1 Scope and definitions.............................................................................................................................................7
1.2 The liquid ring pump...............................................................................................................................................7
1.3 Applications............................................................................................................................................................8
2Technical Data.....................................................................................................................................................9
2.1 Operating and storage conditions..........................................................................................................................9
2.2 Mechanical data.....................................................................................................................................................9
2.3 Performance...........................................................................................................................................................9
2.4 Noise and vibration data ......................................................................................................................................11
2.5 Sealing liquid supply ............................................................................................................................................11
2.6Materials of construction......................................................................................................................................13
3Installation.........................................................................................................................................................14
3.1 Installation requirements......................................................................................................................................14
3.2 Safety...................................................................................................................................................................14
3.3 Pumping system design.......................................................................................................................................15
3.4 Sealing liquid system design................................................................................................................................15
3.5 Unpack and inspect..............................................................................................................................................18
3.6 Locate the pump ..................................................................................................................................................18
3.7 Fit the motor or drive/transmission.......................................................................................................................18
3.8 Connect the sealing liquid pipelines.....................................................................................................................20
3.9 Connect the pump inlet and outlet .......................................................................................................................20
3.10Connect the electrical supply to the motor...........................................................................................................21
3.11Check the direction of pump rotation ...................................................................................................................21
3.12Check the leak tightness of the system ...............................................................................................................22
4Operation...........................................................................................................................................................23
4.1 General operation safety......................................................................................................................................23
4.2 Start-up.................................................................................................................................................................23
4.3 Cavitation and fluid hammer ................................................................................................................................24
4.4 Shut down ............................................................................................................................................................25
5Maintenance ......................................................................................................................................................26
5.1 Safety information ................................................................................................................................................26
5.2 Maintenance plan.................................................................................................................................................26
5.3 Check pipelines and connections ........................................................................................................................27
5.4 Internally inspect/overhaul the pump...................................................................................................................27
5.5 Fault finding..........................................................................................................................................................28

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6 LRP200000228 Issue A
6Storage and disposal........................................................................................................................................29
6.1 Storage.................................................................................................................................................................29
6.2 Disposal ...............................................................................................................................................................30
7Service and spares...........................................................................................................................................31
7.1 Introduction ..........................................................................................................................................................31
7.2 Service .................................................................................................................................................................31
7.3 Spares..................................................................................................................................................................31
7.4 Contamination....................................................................................................................................................31
Illustrations
Figure Page
Figure 1 - Recommended sealing liquid and seals flush supply system configurations: sheet 1 of 2 .......................16
Figure 2 - Recommended sealing liquid and seals flush supply system configurations: sheet 2 of 2 .......................16
Tables
Table Page
Table 1 –Operating and storage conditions.................................................................................................................9
Table 2 –Mechanical data............................................................................................................................................9
Table 3 –Performance data.......................................................................................................................................10
Table 4 –Typical performance data: AWC pumps, 50 Hz operation.........................................................................10
Table 5 –Typical performance data: AWC pumps, 60 Hz operation .........................................................................10
Table 6 –Sealing liquid flow rates: AWC pumps........................................................................................................11
Table 7 –Noise data...................................................................................................................................................11
Table 8 –Vibration data..............................................................................................................................................11
Table 9 –Sealing liquid supply data...........................................................................................................................12
Table 10 –Materials of construction; process contact parts ......................................................................................13
Table 11 –Maximum inlet/outlet connection loading forces and moments................................................................15
Table 12 –Motor reference data ................................................................................................................................19
Table 13 –Cable reference data................................................................................................................................21
Table 14 –Maintenance plan .....................................................................................................................................27
Table 15 –Fault finding ..............................................................................................................................................28

Instruction Manual
LRP200000228 Issue A 7
1 Introduction
1.1 Scope and definitions
This manual provides installation, operation and maintenance instructions for the Atlas Copco
Standard/Safe Area Liquid Ring Vacuum Pumps (abbreviated to ‘liquid ring pump(s)’ or ‘pump(s)’ in the
remainder of this manual).
You must use your pump as specified in this manual.
Read this manual before you install and operate your pump. Important safety information is highlighted
as WARNING and CAUTION instructions; you must obey these instructions. The use of WARNINGS
and CAUTIONS is defined below.
WARNING
Warnings are given where failure to observe the instruction could result in
injury or death to people.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the
equipment, associated equipment and process.
The units used throughout this manual conform to the SI international system of units of measurement.
The pump identification and rating plate (refer to the System Manual) provides specific details about the
pump, including: pump type; part number and serial number; and so on.
The following IEC warning labels appear on the pump:
Warning - refer to accompanying documentation.
Protective earth (ground)
Ear defenders must be worn. (Only fitted to pumps which generate noise
levels (at 1 metre) > 85 dB(A): see Section 2.4)
1.2 The liquid ring pump
The Standard AWC Liquid Ring pumps are suitable for pumping a wide range of non-flammable gases and
vapours, subject to the restrictions specified in Section 1.2.1.
Standard pumps have mechanical seals. Each seal has its own seals flush supply, provided internally from
the sealing liquid ring.

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8 LRP200000228 Issue A
1.2.1 Abnormal operation
WARNING
Misuse of the pump as described below is strictly prohibited.
•Pumping hydrocarbon oxides.
•Pumping oxidants.
•Pumping gases that tend to self-decompose, or that are chemically unstable.
•Pumping gases that contain particles larger than 23μm or more than 0.1% by weight
•Use with oxygen enriched atmospheres.
•Use of the pump with mineral oil as the seals flush liquid.
•Use of the pump with a sealing liquid or seals flush liquid which does not comply with the
requirements of Section 2.6.
•Pumping of, or use of, the pump in the presence of explosive atmospheres.
•Use of the pump in ambient conditions other than those specified in Section 2.
1.3 Applications
The pumps are suitable for use in distillation, filtration, evaporation, drying, stripping and deaeration
processes in a wide range of industries and applications.
You must ensure that the pump is suitable for your application.
If you have any doubts as to the suitability of the pump for your application, consult Atlas Copco
Applications Engineers for advice.

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LRP200000228 Issue A 9
2 Technical Data
2.1 Operating and storage conditions
Table 1 –Operating and storage conditions
Ambient operating temperature range
-20 °C to 50 °C
Ambient storage temperature range
-30 °C to 50 °C
Maximum ambient operating humidity
90 %
Maximum operating altitude
1000 m ASL
Maximum inlet gas temperature
80 °C
If you use a water-based sealing liquid, where ambient temperatures can fall close to 0 °C or below, take
appropriate precautions to ensure that the liquid does not freeze and damage the pump
2.2 Mechanical data
Table 2 –Mechanical data
Item
Reference data
Dimensions
Refer to GA drawing LRP20000A727
Mass
Refer to GA drawing LRP20000A727
Process, sealing liquid and seals flush connections
Refer to GA drawing LRP20000A727
Maximum flatness deviation for mounting*
AWC160, AWC220, AWC290, AWC390
0.1 mm/m
* Refer to Section 3.7.
2.3 Performance
NOTE
The performance data specified in Table 3to Table 6 applies to pumps used with water as the
sealing liquid. Additional performance data may be supplied in your System Manual if you have
specifically ordered your pump for use with a different sealing liquid.
The "Maximum sealing liquid flow rate" data specified in Table 6 may include seals flush liquid which
flows into the sealing liquid ring on pumps without a closed-loop seals configuration. Refer to your
System Manual for the specific details of your pump system.

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10 LRP200000228 Issue A
Table 3 –Performance data
Maximum
speed: rpm
Maximum motor
rating: kW
Maximum
backpressure:
bar(a)
Maximum process inlet capacity
See Table 4 and Table 5
AWC160
1740
7.5
1.3
AWC220
1740
11
1.3
AWC290
1740
15
1.3
AWC390
1740
18.5
1.3
Table 4 –Typical performance data: AWC pumps, 50 Hz operation
Pump(s)
Speed *
rpm
MP
kW†
Typical performance‡
40 mbar(a)
100 mbar(a)
200 mbar(a)
500 mbar(a)
4.0 x 103Pa
1.0 x 104Pa
2.0 x 104 Pa
5.0 x 104Pa
m3/h
kw
m3/h
kw
m3/h
kw
m3/h
kw
AWC160
1450
4
50
2
80
3.1
127
3.6
164
3.8
AWC220
1450
5.5
50
2.8
133
4.4
180
5.3
210
5.2
AWC290
1450
7.5
103
4.2
160
6
223
7
275
7
AWC390
1450
11
115
6.5
235
8.5
313
9.8
360
10.5
*Nominal pump rotational speed.
† Recommended motor power. For increased motor power, consult Atlas Copco.
‡ Performance specifies the inlet capacity (m3/h) for the specified inlet pressures, (40 mbar(a), 100
mbar(a), 200 mbar(a) and 300 mbar(a)).
Table 5 –Typical performance data: AWC pumps, 60 Hz operation
Pump
Speed *
rpm
MP
kW†
Typical performance‡
40 mbar(a)
100 mbar(a)
200 mbar(a)
500 mbar(a)
4.0 x 103Pa
1.0 x 104Pa
2.0 x 104 Pa
5.0 x 104Pa
m3/h
kw
m3/h
kw
m3/h
kw
m3/h
kw
AWC160
1750
7.5
60
3
95
4.3
155
5.1
200
5
AWC220
1750
11
60
3.4
160
5.6
220
6.8
258
6.8
AWC290
1750
15
137.5
5.2
200
8
285
9
342
8.6
AWC390
1750
18.5
137.5
9
285
11.2
378
13
446
14.2
* Nominal pump rotational speed.
† Recommended motor power. For increased motor power, consult Atlas Copco.
‡ Performance specifies the inlet capacity (m3/h) for the specified inlet pressures, (40 mbar(a), 100
mbar(a), 200 mbar(a) and 300 mbar(a)).

Instruction Manual
LRP200000228 Issue A 11
Table 6 –Sealing liquid flow rates: AWC pumps
Sealing liquid flowrate m3/h
(Using water at 15°C as sealing liquid)
Type
without a separator
Circuit with separator and re-circulation of working liquid
33-200
mbar
200-500
mbar
500
mbar
33-200
mbar
200-500
mbar
500
mbar
AWC160
0.80
0.35
0.30
0.45
0.25
0.12
AWC220
1.00
0.40
0.35
0.50
0.30
0.12
AWC290
1.20
0.40
0.35
0.60
0.30
0.12
AWC390
1.80
0.45
0.40
0.90
0.40
0.18
2.4 Noise and vibration data
Table 7 –Noise data
Pump
Typical continuous A-weighted emission sound
pressure level (dB) plus uncertainty*† (50 Hz)
AWC160
63
AWC220F
68
AWC290
69
AWC390
73
* Nominal pump rotational speed.
†Measured at 1 meter free field. Table 8 –Vibration data
Pump
Vibration velocity levels mm s-1 rms *
All pumps
2.8
* Zone boundary A/B according to ISO 20816-1; clauses 6.3.2.3 and 6.3.2.4 and Annex C.
2.5 Sealing liquid supply
2.5.1 General requirements
Standard/Safe Area pumps are configured for internal seals flush supplies and only require a sealing liquid
supply. Your sealing liquid must meet the following requirements:
•You must not use a flammable sealing liquid.
•The liquid(s) must be compatible with the process gases and vapours pumped, and with the
materials of construction of the pump (see Section 2.7).
•During operation, the pump unit must be continually supplied with working-liquid which must be free
of solids such as sand. If necessary, connect a filter on the intake inside.
•The pressure of the sealing liquid supply must be adequate to overcome pressure losses through
the supply pipelines. Adjust the pressure in the feed pipe to approx. 1bar above the necessary
suction pressure.
When the vapour pressure of the sealing liquid is close to the process inlet pressure, the liquid sealing ring

Instruction Manual
12 LRP200000228 Issue A
can start to boil and this may result in cavitation. (Cavitation occurs when vapour bubbles formed at the
suction inlet are transferred to the discharge outlet, where the bubbles collapse under pressure with
potentially destructive force.)
You should therefore ensure that the temperature of the sealing liquid supply is as low as possible. If the
temperature of the process gas is > 80 °C, consult Atlas Copco Application Engineers for advice.
2.5.2 Use of water based sealing liquid
If you use a water based sealing liquid, where ambient temperatures can fall close to 0 °C or below, take
appropriate precautions to ensure that the liquid does not freeze and damage the pump.
Such precautions may include the addition of ethylene glycol anti-freeze to the liquid, in concentrations to
suit the climatic conditions. You must not use other types of anti-freeze, without consulting Atlas Copco.
Table 9 –Sealing liquid supply data
Sealing liquid pressure
> outlet pressure + 0.05 bar, 5 x 103 Pa
Sealing liquid
Maximum viscosity*
1 x 10-5 m2 s-1
Maximum density*
1200 kg m-3
Maximum flow rate
See Table 6
Maximum temperature
80 °C
* Contact your supplier or Atlas Copco if you want to use a sealing liquid with higher density/viscosity.

Instruction Manual
LRP200000228 Issue A 13
2.6 Materials of construction
Table 10 –Materials of construction; process contact parts
AWC160, AWC220, AWC290, AWC390 pumps
Component
Cast iron/Stainless steel fitted
Stainless steel
End casings
Grey cast iron
Stainless steel 304
Port plate
Grey cast iron
Stainless steel 304
Pump body
Grey cast iron
Stainless steel 304
Top mounted
separator *
Carbon steel
Stainless steel 304
Impellers
Duplex steel 2304
Duplex steel 2304
Shaft
Stainless steel 2Cr13
Stainless steel 304
Shaft seals
- Faces
Cermet vs carbon
Silicon carbide vs carbon
- Elastomers
FKM
PTFE
- Metal parts
Stainless steel 316
Stainless steel 316
- Springs
Stainless steel 316
Stainless steel 316
Valve plates
PTFE
PTFE
Fasteners
Carbon steel
Stainless steel
Sealant
Polyester urethane
Anaerobic
O ring
NBR
PTFE
* If installed

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14 LRP200000228 Issue A
3 Installation
3.1 Installation requirements
3.1.1. General requirements
The following requirements apply to all pumps:
•The pump is supplied as a bare shaft pump. To operate the pump, you must fit a motor, or connect
the pump to a drive with the characteristics set out in Section 2.
•You must use a suitable transmission system between the drive and the pump. The transmission
system can take the form of a coupling.
•If a sealing liquid supply system is not already fitted, you must install the pump in one of the system
configurations specified in Section 3.4.
•The pump may be noisy during operation (see Section 2.4). Where necessary, you must either
install the pump in an acoustic enclosure or ensure that people wear suitable protective equipment
(such as ear defenders) when they are close to the operating pump.
3.2 Safety
WARNING
If you use a water-based sealing liquid, harmful bacteria (such as
Legionella) could propagate inside the pump and sealing liquid supply
system. Take suitable precautions to inhibit bacterial growth and to ensure
that untreated bacteria-bearing mist is not discharged from the system.
WARNING
Obey the safety instructions listed below and take note of appropriate
precautions when you install the pump.
•A suitably trained and supervised technician must install the pump.
•Wear the appropriate safety-clothing when you come into contact with contaminated components.
•If your pumping system has already been used, vent and purge it before you start installation work.
•Ensure that the installation technician is familiar with the safety procedures which relate to the sealing/
seals flush liquid(s) and to the products handled by the pumping system.
•Disconnect the other components in the pumping system from the electrical supply/drive system so that
they cannot be operated accidentally.

Instruction Manual
LRP200000228 Issue A 15
Table 11 –Maximum inlet/outlet connection loading forces and moments
Pump
Maximum external forces (N) on
inlet/outlet connections*
Maximum external moments (Nm) on
inlet/outlet connections†
FX
FY
FZ
FR
MX
MY
MZ
MR
AWC160
1500
1300
1650
2600
1400
1000
1150
2050
AWC220
1950
1750
2150
3400
1500
1100
1250
2250
AWC290
1950
1750
2150
3400
1500
1100
1250
2250
AWC390
3000
2700
3350
5250
1750
1250
1450
2600
* FX, FYand FZare the forces in each of the X, Y and Z directions (see below) and FR is the total resultant
force.
† MX, MY and MZ are the moments in each of the X, Y and Z directions (see below) and MR is the total
resultant moment.
X is the horizontal direction, parallel to the drive shaft.
Y is the horizontal direction, at 90°to the X direction.
Z is the vertical direction from the base of the pump upwards.
3.3 Pumping system design
3.3.1 General
WARNING
Obey the safety instructions listed below and take note of appropriate
precautions when you install the pump.
•The gases to be pumped must be free of solids. If necessary, incorporate an inlet filter in the inlet
pipeline to the pump, to prevent the ingress of solids into the pump.
•Make sure that the process outlet pipeline cannot become blocked. If you have an outlet-isolation valve,
make sure that you cannot operate the pump with the valve closed.
•Install a non-return valve in the inlet pipeline, to prevent the reverse-flow of sealing liquid into your
system when the pump is switched off.
•Provide for a purge of inert gas when you shut down the pumping system, to dilute dangerous gases to
safe concentrations.
•Design your pumping system such that, if it is shut down automatically, it cannot restart automatically
without being reset manually.
3.4 Sealing liquid system design
3.4.1 Introduction
WARNING
You must not start the pump if the level of sealing liquid is above the pump
auto drain valve centre line. To avoid this, configure the pump as shown in
Figure 1, detail A, B or C and start-up the pump as described in Section 4.2.
Your pump may be supplied with a sealing liquid system fitted, configured in one of three ways, as
described in Sections 3.4.2 to 3.4.4.

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16 LRP200000228 Issue A
If your pump is not supplied with such a system, you must install the pump in a supply system which:
•Supplies sealing liquid to the pump.
Your supply system must be configured in one of the following three ways (shown in Figure 1):
•Total recirculation system: see Section 3.4.2.
•Partial recirculation system: see Section 3.4.3.
•Once-through system: see Section 3.4.4.
Figure 1 - Recommended sealing liquid and seals flush supply system configurations: sheet 1 of 2
Figure 2 - Recommended sealing liquid and seals flush supply system configurations: sheet 2 of 2

Instruction Manual
LRP200000228 Issue A 17
Reference
Description
A.
Total recirculation system
B.
Partial recirculation system
C.
Once-through system
1.
Priming/drain valve
2.
Liquid ring pump
3.
Liquid ring supply pipeline
4.
Sealing liquid supply flow indicator
5.
Temperature gauge
6.
Flow regulating valve
7.
Cooler
8.
Sealing liquid reservoir
9.
Float operated fill/top-up valve
10.
Liquid ring supply valve
11.
Liquid ring supply
12.
Discharge outlet/vent
13.
Overflow
14.
Pump outlet pipeline
15.
Outlet temperature gauge
16.
Non-return valve
17.
Pump inlet
18.
Pressure gauge
3.4.2 Total recirculation sealing liquid supply system
A total recirculation system minimizes waste sealing liquid from the pump. Such a system may be
particularly effective when used in a drying process, where process vapours are condensed inside the
pump; the sealing liquid used can be the same as the condensed process vapours. In this configuration a
loss of cooling liquid to the heat exchanger could cause the service liquid temperature and hence any
contact surfaces to exceed the maximum allowable surface temperature.
Refer to Figure 1, detail A. The sealing liquid discharged at the pump outlet is separated from the pumped
gases and vapours in the sealing liquid reservoir (8), connected to the pump discharge outlet pipeline (12).
The sealing liquid is then recirculated to the pump through a cooler (7). This removes the heat of
compression and any latent heat of condensation from the recirculated sealing liquid.
3.4.3 Partial recirculation sealing liquid supply system
Refer to Figure 1, detail B. In a partial recirculation system, part of the sealing liquid discharged at the outlet
is recirculated through the pump (2).
The sealing liquid discharged at the pump outlet enters the sealing liquid reservoir (8), connected to the
process outlet pipeline (12).
Fresh sealing liquid is supplied to the reservoir (8), through the float operated fill/top-up valve (9).
A mixture of fresh and recovered sealing liquid from the reservoir is then supplied to the sealing ring in the
pump (through the supply pipeline: 6, 5, 4, 3).

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18 LRP200000228 Issue A
3.4.4 Once-through sealing liquid supply system
NOTE
Because of the potential environmental impacts, the use of once-through systems should be carefully
considered.
Refer to Figure 1, detail C. In once-through systems, the sealing liquid is supplied directly to the liquid ring
in the pump (8), through a suitable supply pipeline (11, 10, 6, 18, 5, 4, 3).
The used sealing liquid is discharged with the pumped gases and vapours through the outlet pipeline (14)
into your exhaust-extraction system.
3.5 Unpack and inspect
1. Remove all packing materials and protective covers and check the pump. If the pump is damaged,
notify your supplier and the carrier in writing within three days; state the Item Number of the pump
together with your order number and your supplier's invoice number. Retain all packing materials for
inspection. Do not use the pump if it is damaged.
2. Look at the pump identification plate (refer to the System Manual) and check that the pump is suitable
for use in your system. If the pump is not suitable for use in your system, do not continue to install the
pump: contact your Supplier or Atlas Copco.
If the pump is not to be used immediately, refit the protective covers. Store the pump in suitable conditions,
as described in Section 6.1.
3.6 Locate the pump
WARNING
Use suitable lifting equipment to move the pump, as described below. If you
do not, you can injure yourself or damage the pump. Refer to the pump
nameplate for the mass of the pump.
Ensure that the operating location is clean and free from debris and oil.
You must ensure that when the pump is in its required operating location, all of the mounting feet are in the
same plane, flat on the mounting platform. The platform must be firm and level, with a maximum flatness
deviation less than that specified in Table 2.
Do not use shims or spacers under the mounting feet to level the pump.
1. The pump can be shift by the iron chain or the sling for hoisting transport.
2. Use the lifting equipment to move the pump to its required operating location on the mounting platform,
then disconnect the lifting equipment.
3. Fit suitable bolts through the fixing bolt holes in the mounting feet, to secure the pump in position. Refer
to the System Manual for the locations and sizes of the fixing holes.
3.7 Fit the motor or drive/transmission
3.7.1 Introduction
The pump is supplied as a bareshaft pump. You must therefore fit a suitable motor (refer to Section 3.7.2),
and fit a suitable drive and transmission (refer to Section 3.7.3).

Instruction Manual
LRP200000228 Issue A 19
3.7.2 Fit a motor
Fit your motor to the pump as specified in the manufacturer’s manual supplied with your motor. Ensure that
the motor is suitable for use with the pump. Below motor data for reference only.
Table 12 –Motor reference data
Motor data recommendation
Pump
Frequency:
Hz*
Speed:
rpm
Power:
KW
Voltage:
V
Pole
Frame
size
Mounting
AWC160
50
1450
4
400/690
4
112M
B5
60
1750
7.5
460
4
132M
B5
25-65
1450
7.5
380
4
132M
B5
AWC220
50
1450
5.5
400/690
4
132S
B5
60
1750
11
460
4
160M
B5
25-65
1450
11
380
4
160M
B5
AWC290
50
1450
7.5
400/690
4
132M
B5
60
1750
15
460
4
160L
B5
25-65
1450
15
380
4
160L
B5
AWC390
50
1450
11
400/690
4
160M
B5
60
1750
18.5
460
4
180M
B5
25-65
1450
18.5
380
4
180M
B5
*: 25HZ is limitation of motor, for liquid ring pump, the min. frequency should be about 35HZ.
3.7.3 Fit a drive and transmission
WARNING
Ensure that the drive/transmission is suitable for use with the pump/system.
WARNING
You must fit suitable guards to protect people from rotating/moving parts.
CAUTION
Your drive and transmission system design must ensure that the maximum pump rotational
speed specified in Section 2.3 cannot be exceeded.
A suitable coupling and transmission system must be used to connect the drive to bareshaft liquid ring
pumps.

Instruction Manual
20 LRP200000228 Issue A
Connect the components of the drive and transmission system to the pump drive shaft as described in the
manufacturer’s instructions supplied with the components.
3.8 Connect the sealing liquid pipelines
WARNING
Atlas Copco cast iron pumps are treated with a corrosion inhibitor. To avoid
contamination flush with a suitable fluid.
Connect the sealing liquid system pipelines to the pump in accordance with the requirements shown in the
corresponding detail A, B or C of Figure 1.
Refer to the System Manual for the sizes and locations of the sealing liquid supply and drain ports.
3.9 Connect the pump inlet and outlet
3.9.1 Introduction
Take note of the following when you connect the pump process inlet and outlet:
•For optimum pumping speeds, ensure that the pipeline connected to the process inlet is as short as
possible.
•The pipelines must have an internal diameter not less than the pump inlet/outlet diameter.
•Support the pipelines to prevent loading of the inlet/outlet joints on the pump.
•Use a suitable inlet trap or filter to prevent the entry of solid particles into the pump.
•The inlet and outlet seals used must be compatible with the sealing fluid used, with the substances
pumped, and with the process/operating conditions.
3.9.2 Connect the process inlet
Use a suitable gasket as a seal and connect the pipeline from your vacuum system to the process inlet on
the pump. The gasket you use must be made of a material which is compatible with the process.
3.9.3 Connect the process outlet
WARNING
The design must prevent the emission of hazardous gases and vapours into
the surrounding atmosphere.
CAUTION
Ensure that the maximum outlet pressure specified in Section 2.3 cannot be exceeded. If it is,
the drive or motor will trip and the pump will stop.
Use a suitable gasket as a seal and connect your outlet pipeline to the process outlet on the pump or on
the sealing liquid supply system (see Figure 1).
The gasket you use must be made of a material which is compatible with the process.