Pfeifer Vacuum XtraDry 150-2 User manual

Translation of the original instructions
Operating Instructions
EN
PU 0044 BEN/E (1207)
XtraDryTM 150-2/250-1
Piston Vacuum Pump

2
1. Safety Precautions.......................... 3
1.1. For Your Orientation ......................................... 4
2. Understanding The Pump.............. 5
2.1. Main Features................................................... 5
2.2. Differences Between The Pump Types............ 5
2.3. Delivery............................................................. 5
3. Installation....................................... 6
3.1. Setting Up The Pump And Location ................. 6
3.2. Connecting The Vacuum Side........................... 6
3.3. Connecting The Exhaust Side........................... 6
3.4. Connecting To Mains Power ............................ 7
4. Operations....................................... 8
4.1. Important Information....................................... 8
4.2. Switching The Pump ON And OFF ................... 8
4.3. Operation With Gas Ballast .............................. 9
5. What To Do In The Case Of
Breakdowns ?................................... 10
6. Maintenance .................................. 11
6.1. Precautionary Measures During Maintenance
Work ............................................................... 11
6.2. Replacing the piston seals .............................. 11
6.3 Replacing the radial shaft seal ........................ 14
7. Service ........................................... 16
8. Technical Data ............................... 17
8.1. Dimensions..................................................... 18
9. Accessories.................................... 19
10. Spare parts .................................... 19
10.1 Spare Parts Package ....................................... 19
Declaration of Conformity .... (last page)
Table of Contents
Seite
Please note:
Current operating instructions are also available at
www.pfeiffer-vacuum.net.

3
Obey all relevant safety requirements (regulations and guide-
lines) and adopt suitable safety measures.
☞Read and follow all the instructions in this manual.
☞Inform yourself regarding:
- Hazards which can be caused by the pump;
- Hazards which can arise in your system;
- Hazards which can be caused by the medium being
pumped.
Use the equipment for the intended use only (for generation
of vacuum).
☞Avoid exposing any part of the body to vacuum.
☞Adopt suitable measures to prevent any danger arising
from the formation of hot surfaces or electric sparks.
☞Obey notes on correct vacuum and electrical connections,
see section ”Use and operation”.
☞Make sure that the individual components are only
connected, combined and operated according to their
design and as indicated in the instructions for use.
☞Observe all safety and accident prevention regulations.
☞Check regularly that all safety requirements are being
complied with.
☞Do not carry out any unauthorized conversions or
modifications on the pump.
☞Check that mains voltage and current conform with the
equipment (see rating plate).
☞The mains connection must be subject to a safe
connection to the PE.
☞Pay attention to the condition of cable insulation.
☞The user must take suitable precautions to prevent any
formation of explosive mixtures in the expansion chamber.
Mechanically generated sparks, hot surfaces or static
electricity may ignite these mixtures.
☞Adopt suitable measures to prevent the release of dange-
rous, explosive, corrosive or polluting fluids.
☞Take adequate precautions to protect people from the
effects of dangerous substances, wear appropriate safety
clothing.
☞Obey applicable regulations when disposing of chemicals.
Take into consideration that chemicals may be polluted.
Due to the residual leak rate of the equipment, there may be
an exchange of gas, albeit extremely slight, between the envi-
ronment and the vacuum system.
☞Adopt suitable measures to prevent contamination of the
pumped substances or the environment.
Electronic equipment is never 100% fail-safe. This may lead to
an indefinite status of the equipment. Provide protective
measures against malfunction and failure.
☞Stopping of the pump or operating a valve must not lead to
a critical dangerous situation under any circumstances.
Ensure that in case of failure the pump and the vacuum
system always will turn into a safe status.
☞In the event of cracks or leaks in the manifold pumped
substances might be re-leased into the environment or into
the pump housing.
☞Especially obey notes on operation, use and maintenance.
☞Use only genuine spare parts and accessories.
☞Otherwise safety and performance of the equipment as
well as the electromagnetic compatibility of the equipment
might be reduced.
☞Ensure that maintenance is done only by suitably trained
and supervised technicians.
Ensure that the maintenance technician is familiar with the
safety procedures which relate to the product processed
by the vacuum system and that the equipment, if
necessary, is appropriately decontaminated before
starting maintenance.
☞Obey local and national safety regulations.
Before starting maintenance vent the system, isolate the
pump and other components from the vacuum pump and
the electrical supply and allow sufficient cooling of the
pump.
☞When returning the pump to us please note the shipping
instructions in Section 7.
1. Safety Precautions

4
Proper use
– The XtraDry may only be used for the purpose of
generating vacuum.
– The piston vacuum pumps may only be used to pump dry,
inert or non reactive media.
1.1. For Your Orientation
Instructions in the text
➡Operating instructions: Action should be taken!
Symbols used
The following symbols are used throughout in the
illustrations:
Vacuum flange (inlet flange)
Exhaust flange
Gas ballast valve
Power supply connection
Position numbers
Identical components and accessories parts have the same
position numbers in all illustrations.
Danger of damage to the pump or system.
CAUTION
Danger of personal injury.
WARNING
Pictogram Definitions
Danger of burns from touching hot parts.
WARNING
Danger of an electric shock.
WARNING
Important note.
☞
PLEASE NOTE
Improper Use
The following are regarded as improper:
– Uses not covered above, and, in particular:
– Operating the pumps in areas where there is a danger
of explosion.
– The pumping of corrosive or explosive gases.
– The pumping of gases which are contaminated with
particles, dust and condensate.
– The pumping of liquids.
– The XtraDry may not be used for the purpose of
generating pressure.
– Connection to units which contain touchable and
voltage carrying parts.
– Connection to pumps and units which is not permitted
according to their operating instructions.
– Using accessories not named in this manual is not
permitted without authorization from Pfeiffer Vacuum.
– Operating the pump at intake pressure > 25 mbar conti-
nously --> for N2and air.
– The evacuating of inadmissibly high chamber volumes;
(please see technical data)
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feeiitteedd..

5
Feature XtraDry 250-1 XtraDry 150-2
Line-up of the compression
spaces parallel series
Inlet connection (flange) DN 25 ISO-KF DN 25 ISO-KF
Exhaust flange with
small flange DN 25 ISO-KF DN 25 ISO-KF
twice single
exhaust silencer standard standard
Gas ballast valve yes yes
Max. volume flow rate 13 m3/h 7,5 m3/h
Ultimate pressure < 7 mbar < 0,1 mbar
Speed control automatically via pressure switch
Description of pump mechanism
The XtraDry is an oil-free vacuum pump, which is based and
operates on the piston principle.
Each compression stage consists of a cylinder in which a
piston reciprocates in a cylinder.
In the XtraDry model 150-2, two compression stages are inter-
nally connected in series. Gas coming from the inlet enters
the compression space of the first piston (stage I). After
compression, the now higher pressure gas enters the
compression space of the second piston (stage II). Once the
gas reaches a pressure slightly above atmosphere it leave
the pump via a one way valve.
The XtraDry model 250-1 consists of two pistons connected in
parallel which during each stroke simultaneously take gas in,
compress it to atmospheric pressure and eject it to
atmosphere.
XtraDry 250-1 XtraDry 150-2
2. Understanding The Pump
2.1. Main Features 2.2. Differences Between The Pump Types
2.3. Delivery
– Piston Pump XtraDry 150-2/250-1
– Exhaust silencer 1/2 piece/s
– Operating Instructions
2
13 14 12
XtraDry
1 Inlet flange
2 Exhaust flange; alternatively exhaust silencer
(two connections in parallel configured pumps)
12 Operating hours counter
13 Mains connection
14 On/Off switch
1

6
3.1. Setting Up The Pump And Location
Obey national safety regulations and safety requirements
concerning the use of vacuum and electrical equipment.
➡Remove all packing material, remove the product from its
packing-box, remove the protective covers from the inlet
and outlet connection and keep, inspect the equipment.
➡Do not use the equipment if it is damaged.
➡If the equipment is not used immediately, replace the
protective covers. Store the equipment in suitable conditi-
ons.
➡Read and obey this manual before installing or operating
the equipment.
➡When transporting, use only the eye bolt provided for the
purpose.
3. Installation
3.2. Connecting The Vacuum Side
➡Remove locking cap on intake connection 1.
➡Connect pump with intake connection to the apparatus.
– Be sure the connection between the vacuum system
and the pump is flexible and as short as possible.
➡Obey maximum permitted pressures and pressure differen-
ces, see section ”Technical data”. Do not operate the
pump with overpressure at the inlet.
➡To protect the pump, separators, filters and cooling traps
etc.(see Section 9. Accessories) can be fitted upstream of
the pump.
➡The diameter of the inlet line should be at the least as
large as the diameter of the pump connection.
3.3. Connecting The Exhaust Line
Pressure can rise to dangerous levels in exhaust
lines. Therefore, lay exhaust lines without shut-
off valves. Do not connect the exhaust line with
a closed system due to the danger of bursting.
In certain applications, exhaust gases and
vapors can be very hot and represent a health
and/or environment hazard.
➡Lay exhaust lines from the pump sloping downwards so
that condensate cannot run back into the pump, otherwise
fit a separator.
➡Do not permit any uncontrolled pressurizing (e. g. make
sure that the exhaust pipeline cannot become blocked).
Risk of bursting!
– Interchanging the connections vacuum side/ exhaust
line causes dangerous excess pressure levels.
➡The diameter of the outlet line should be at the least as
large as the diameter of the pump connection.
The pumping speed rate can be affected by the
exhaust silencer.
It is better to use an exhaust line with extraction
system as an alternative.
If condensable vapors are present in the
exhaust, the supplied silencer can not be used.
Instead, use a length of hose which will reduce
the exhaust noise as well as allow the collection
of the condensate.
Note: Needs 1/2 inch hose nipple to make
connection.
If other pumps exhaust into this system exchan-
ge of contamination can take place.
WARNING
CAUTION
CAUTION
Transporting the pump
➡If the equipment is brought from cold environment into a
room for operation, allow the equipment to warm up (pay
attention to water condensation on cold surfaces).
➡Make sure ventilation is adequate if pump is installed in a
housing.
➡Provide a firm level platform for the equipment and check
that the system to evacuated is mechanically stable and
that all fittings are secure.
Attention: Flexible elements tend to shrink when
evacuated.
To the best of our knowledge the equipment is in compliance
with the requirements of the applicable EC-directives and
harmonized standards (see “Declaration of conformity”) with
regard to design, type and model, especially directive
IEC 1010. This directive gives in detail conditions, under which
the equipment can be operated safely (see also IP degree of
protection).
➡Adopt suitable measures in case of differences, e. g.
improve cooling measures when installation in altitudes of
more than 1000 m above mean sea level.
➡Ambient temperature range + 12°C (50°F) ... +40 °C (100°F).
➡If the pump is to be installed in an enclosed space make
sure that adequate cooling air can circulate. Maximum
temperature in the enclosure cannot be above 40°C
(100°F). There needs to be at least 15 cm (6 inch) between
the enclosure and the motor fan.

7
3.4. Connecting To Mains Power
The pump is equipped with a frequency variable motor for
speed control as standard:
207 ... 253 V; 50/60 Hz,
104 ... 127 V; 50/60 Hz,
90 ... 110 V/AC; 50/60 Hz.
➡Carry out electrical connections in accordance with local
regulations.
– Voltage and frequency values on the rating plate must
concur with mains voltage and mains frequency values.
– Attach pump to mains using the protective conductor
(PE) always.
– For pumps without a power plug on the connecting
cable, have the mains connection made by qualified
personnel only.
Mains connection must always apply a contact
to the earthed conductor, otherwise electrical
voltage could occur on the pump housing.
WARNING
Dangerously high voltage in the terminal
box!
Before opening the terminal box disconnect the
mains plug and wait for five minutes, until the
intermediate circuit voltage (> 300 V) has
discharged.
➡Switch ON/OFF motor (pump) with release switch 14.
– In case of an error (e.g. overheating, overcurrent,
overvoltage) the electronics of the frequency converter
switches off the motor automatically. If the error doesn´t
exist any longer, the pump restarts automatically.
Recommend fuse for mains connection:
207 ... 253 V/AC -->10 A,
104 ... 127 V/AC -->16 A,
90 ... 110 V/AC -->16 A.
Reset of the drive after triple occurance
The frequency converter drive is blocked, after an error has
occured triple in quick succession.
➡Disconnect the frequency converter from the mains, for
CAUTION
WARNUNG
Control elements at the terminal box
12 Operating hours counter
13 Mains connection
14 Motor release switch
13 14 12
Operating panel

8
4.1. Important Information
Before starting the pump pay attention to:
– max. permissible chamber volume
– max. permissible intake pressure for
continous operation, (see Section 8.0
Technical Data).
CAUTION
Danger of burns!
When the pump is running, surfaces and motor
casing become hot.
If the pump is subjected to condensates it
should be allowed to run for approximately
30 minutes under atmospheric pressure before
switching off. This will insure that the compres-
sion spaces are free of any condensables.
CAUTION
WARNING
4.2. Switching The Pump ON And OFF
The pump can be switched on and off within the permissible
intake and exhaust pressure range.
– Lowest starting temperature is +12°C (50 Deg. F).
➡Switch the pump on using the built in ON/OFF switch (14).
– The motor has a thermal protection switch which turns
the motor off in case of prolonged very high load opera-
tion.
– Please be certain to ascertain the cause of the problem
and eliminate it.
After cool-down of the motor protection switch,
the pump automatically starts.
CAUTION
4. Operations
Automatic speed control
The pump is equipped with a pressure switch 17 for
automatic rotation speed control.
The rotation speed is reduced automatically at final vacuum
to minimize the power consumption and the emission sound
pressure level of the pump.
Pressure transducer for automatic speed control
17 Pressure transducer
17
.

9
Gas ballast mode (valve in position
“high”)
(Amount of water vapor max. 10 g/hour)
In order to prevent water from condensing in the pump due to
process with larger quantities of water it is essential to fully
open the gas ballast valve. This ensures the exhaust valve
opens before the condensation point of the vapor is reached.
➡Set the sliding sleeve 22 on the gas ballast valve to
position “high”;
– The gas ballast valve closes automatically after the
pump is switched off.
It is best to use dry gas connected (e.g. nitrogen or dry air) to
the ¼" (6mm) compression fitting as the ballasting gas. The
gas ballast must be turned on and the ultimate pressure will
increase.
➡Remove gas ballast filter inserted by the factory before
from the hose connection 19.
Do not exceed the inlet pressure of 0,2 bar (1,2
bar absolute) for ballasting gas.
CAUTION
4.3. Operation with gas ballast
The XtraDry has two modes of gas ballast operation. They
differ in the amount of gas admitted to the pump.
At the hose connection 19 a filter is installed to prevent dust
deposits in the gas ballast inlet.
Gas ballast mode (valve in position
“low”)
(Amount of water vapor < 1g/hour)
With gas ballast valve in position “low” the pump is flushed
permanently with a small gas flow.
Thus enriching of water vapour, which can condense in the
pump, is avoided.
➡Set the sliding sleeve 22 on the gas ballast valve to
position “low”;
– the gas ballast valve closes automatically after the
pump is switched off.
Do not pump vapor before pump has reached
its operating temperature!
Do not pump vapor with gas ballast valve
closed!
Pay attention to the water vapor tolerance (see
Section 8.0 Technical Data).
It is advisable to operate the pump for approximately 30 mins.
with open gas ballast after process is finished. This will ensu-
re that the pump is free of any condensables.
CAUTION
Normal operation mode
18 Gas ballast valve
19 Hose connection
22 Sliding sleeve
18 22 19
“high” “low”

10
5. What To Do In The Case Of Breakdowns ?
PPrroobblleemmPPoossssiibblleeccaauusseeRReemmeeddyy
Pump fails to start or stops ➡Supply failure or voltage to low ☞Check supply voltage.
immediately.
➡Pressure in outlet pipeline too high? ☞Remove blockade in line, open valve.
➡Motor overloaded? ☞Allow motor to cool, identify cause of
failure.
➡Ambient temperature < 12 °C ☞Warm pump.
Pump does not achieve ➡Long narrow line? ☞Use line with larger diameter, length
final pressure or as short as possible.
normal pumping speed
➡Pump has been exposed to ☞Run pump for a few minutes with
condensate? gas ballast (“high”).
➡Outgasing substances or vapor ☞Check process parameters.
generated in the process?
➡Leak in system ☞Repair leak
➡Deposits have been formed ☞Clean and inspect pump heads.
inside the pump?
➡Pump becomes too hot ☞Reduce pump rotation speed, ensure enough
cooling or reduce input pressure.
➡Radial shaft seal damaged ☞Replace radial shaft seal.
➡Worn piston seals ☞Replace piston seals.
Pump stops during operation ➡Thermal overload of ☞Check ambient temperature: --> < 40°C or
motor or frequency converter insufficient air circulation for the motor fan
☞Check supply voltage.
Pump too noisy. ➡Valves damaged ☞Replace valve plates.
➡Atmospheric or high pressure ☞Connect hose to pump outlet.
at inlet port
➡Worn piston seals ☞Replace piston seals.
Pump runs durably with max. ➡Radial shaft seal damaged ☞Replace radial shaft seal.
rotation speed ➡Leak in system ☞Repair leak.
➡Gas ballast valve in position “high” ☞Set sliding sleeve of gas ballast valve in
position “low”.
➡None of above mentioned causes? ☞Return the equipment to Pfeiffer Vacuum
service.

11
6.1. Precautionary Measures During
Maintenance Work
Whenever working on the pump ensure the
pump motor is disconnected from the mains
supply.
If necessary, remove pump from the system for
inspection. Before dismantling allow the pump to
cool down.
➡Only dismantle the pump as far is necessary to effect
repairs.
➡Use only alcohol or similar cleaning agents for cleaning.
Do not use solvents.
The service intervals depend on the respective
field of application of the pump.
Load lock operation can reduce service
intervals.
CAUTION
CAUTION
All pump bearings are sealed and are filled with long-life
hydrocarbon-free-lubricant. The piston seals and the radial
shaft seal are wear parts.
Maintenance work necessarily:
1. If the rated final pressure is no longer achieved, also after
flushing the pump with nitrogen.
2. High noise emission in conjunction with pressure jumps
arise.
The service intervals depend on the respective
field of application of the pump.
Load lock operation can reduce service
intervals.
Requested tools
– Set of Allen key, size: 1,5 ... 8 mm)
– Cross slot screw driver
– Torque wrench 6 Nm with insert bit, size: 5 mm
– Torque wrench 25 Nm with insert bit, size: 6/8 mm
– Torque wrench 25 Nm with wrench-size 17 mm
Toolkit XtraDry (PO 006 001 -T)
CAUTION
6. Maintenance
➡Screw on blocking tool B (PO 003 526) to block the crank
web 20 using the screws of the housing cover 8.
6.2. Replacing the piston seals
➡Unscrew screws 101 and take off the housing cover 8.
➡Unscrew screws 71 and take off both housing covers 6/7;
be careful of O-rings 100.
➡Take off the valve plates 10/11 and the spiral-type
expanders 48.
➡Clean piston heads with alcohol.
➡Remove the connectors from the pressure transducer 17
and the gas ballast valve 18.
➡Take off both cylinders 2/3; note the compensating plates
122 ... 130.
The compensating plates are required for accu-
rate setting of the TDC timing and must be refit-
ted in the same places during assembly of the
cylinders.
☞
PLEASE NOTE
In order to avoid damage to the pump, do not
exchange pistons, connecting rod and compen-
sating plates after dismantling; if necessary
mark the parts.
☞
PLEASE NOTE
Install the blocking tool B
20
B

12
➡Unscrew nut 90 from the connecting rod journal and remo-
ve centrifugal mass 25.
➡Pull off the centrifugal mass 25, connecting rods 15 with
pistons and spacers 27.
➡Mark the position of the pistons.
The pistons must only be placed down on the
piston crown.
The new piston seals must not be damaged by
tools or other items with sharp edges.
➡Infer piston seals from the packing only briefly before the
use;
– protect the piston seals against oil, grease and dirt.
CAUTION
Exploded view cylinder, pistons and connecting rod journal
2 Cylinder (intake side)
3 Cylinder (atmospheric side)
6 Cylinder cover (intake side)
7 Cylinder cover (atmospheric side)
8 Housing cover
10 Valve plate (intake side)
11 Valve plate (atmospheric side)
15a Connecting rod (atmospheric side)
15b Connecting rod (intake side)
18 Gas ballast valve
20 Crank web
25 Centrifugal mass
26 Connecting rod journal
27 Spacers
48 Spiral-type expanders
71 Allan head screw
72 Allan head screw
88 Sicherungsscheibe
90 Nut
100 O-ring
101 O-ring
122 Compensating plates
3
6
48
10
2
748 11 20
15b
122
25
26 27 88 90
8/101
122
15a
71
100

13
Disassembly of the piston
➡Place the piston on the piston crown 30 and unscrew the
Allan head screws 72 on the bottom plate of the piston 31;
be careful of the lock washers 84.
➡Disassemble the piston cap 31 an piston skirt 32.
Assembly
➡Clean all parts; examine valve plates 10/11 and spiral-type
expanders 48 for damages.
➡Install new piston seals 46 between the piston head 30 and
the piston skirt 32 and between the piston skirt and the
piston cap 31.
➡Exchange both O-rings 106 and examine and exchange if
necessary piston guiding rings 34.
➡Working diagonally, tighten the Allan head screws 72 up to
the marking (torque of 1.3 Nm) by means of a torque
wrench and screw the piston head and the piston cap
together.
Exploded view of piston with connecting
15 Connecting rod
30 Piston head
31 Piston cap
32 Piston skirt
33 Supporting ring
34 Piston guiding ring
46 Piston seals
72 Allan head screws
84 Lock washers
106 O-Ring
72
84
31
106
46
33
34
32
34
33
46
106
15
30
➡Assemble both pistons, connecting rods 15 and spacers 27
onto connecting rod journal 26, observe the original positi-
on and the correct sequence.
➡Slide the centrifugal mass 25 onto the connecting rod jour-
nal and tighten it finger tight with the lock washer and the
hexagon nut 90.
marking =
max. 1,3 Nm !
special torque wrench

14
➡Fit connectors to pressure transducer 17 and gas ballast
valve 18.
➡Install new valve plates 10/11; check that they are correct-
ly matched and centred:
– Plastic plate --> intake side
– Metal plate --> atmospheric side
➡Insert the spiral-type expander 48 in the annular groove;
make sure that the two ends of the spiral-type expanders
do not touch each other.
➡Fit the cylinder covers 6/7 and, working diagonally, tighten
each one with 4 Allan head screws 71 to 6 Nm; be careful
of O-ring 100
➡Fit and screw on the housing cover 8; be careful of O-ring
101.
Grease the threads of the screws with vacuum
grease.
☞
PLEASE NOTE
➡Use the centering bolt Z (PV 040 037) to centre the
centrifugal mass 25.
➡Block the crank web 20 using the blocking tool B and
tighten the hexagon nut 90 (jaw size 17) to a torque of
25 Nm.
6.3 Replacing the radial shaft seal
Carry out the preliminary steps described in section 6.2:
➡Disassemble the centrifugal mass 25, connecting rods 15
and spacers 27.
Dismantling
➡Loosen the screws of the balancing weight 21 from the
crankweb 20 to disable the clamping effect of the
crankweb.
➡Loosen the crank web 20 using the screw 70.
➡Unscrew and remove blocking tool B and take off
crankweb 20.
➡Loosen the three screws on the shaft feedthrough 41 and
remove the shaft feedthrough by hand from the housing.
➡Fit both cylinders (2/3); note the compensating plates 122 ...
130.
The compensating plates are required for accu-
rate setting of the TDC timing and must be refit-
ted during assembly of the cylinders.
☞
PLEASE NOTE
45˚
45˚
Tilting the pump
Tilting the pump 45° in each case simplifies the assembly of
the compensating and valve plates.
Use the centering bolt Z
B
Z
Centering bolt Z has different shaft ends.
Screw in the appropriate side of the
centering bolt, depending on the motor shaft
design.
CAUTION
21 20 70
Loosening the balancer weight and disassembling the crankweb

15
T
➡Disassemble the shaft feedthrough 40/41 in order to install
a new radial shaft seal 56; to do this you will need to undo
the screws 81.
Assembly
➡Clean shaft feedthrough 40/41 with alcohol.
➡Replace the vacuum grease for lubrication of the radial
shaft seal in the annular groove.
➡Insert radial shaft seal 56 (mounted on a transportation
bush T) in aluminium disc 40 and insert O-ring 103.
Dismantling the shaft feedthrough 40/41 and replacing the radial
shaft seal 56
40 Aluminium disc of shaft feedthrough
41 Aluminium disc of shaft feedthrough
55 Protective sleeve
56 Radial shaft seal
81 Countersunk screw
103 O-ring
106.1 O-ring
T Transportation bush
41 56 103 40 106.1 81 55
➡Slightly grease the running surface of the protective
sleeve.
Applying fresh grease with a syringe
Risk of damaging the sealing edge of the radial
shaft seal 56!
➡Slide the shaft feedthrough onto the end of the shaft until
the stop is reached; remove the the transportation
bush T.
➡Attach the shaft feedthrough to the housing using 3
screws and tighten the screws finger tight.
➡Slide on the crank web 20 and draw it axially onto the
shaft, using the disc S and the Allan head screw Z and
working through the shaft feedthrough;
tightening torque: 6 Nm.
CAUTION
➡Tighten the clamping bolt of the crank web 20 to 25 Nm.
➡Loosen the Allan head screw Z and disc S again and remo-
ve them.
➡Tighten the balancing weight 21; tightening torque: 8 Nm
➡Install the connecting rods as described in section 6.2.
Disassembly of the shaft feedthrough
41
➡Screw down parts 40 and 41 using countersunk screws
(tightening torque: 2.8 Nm).
➡Insert O-ring 106.1.
dient nur zum
Aufziehen
Assembly of the crank web 20 and balancing
weight 21
21 20
S und Z

16
7. Service
1) Forms under www.pfeiffer-vacuum.net
Repair orders are carried out according to our
general conditions of sale and supply.
➡If repairs are necessary, please send the unit together
with a short damage description to your nearest Pfeiffer
Vacuum Service Center.
☞
PLEASE NOTE
Do Make Use Of Our Service Facilities
In the event that repairs are necessary to your pump or
pumping station, a number of options are available to you to
ensure any system down time is kept to a minimum:
– Have the pump repaired on the spot by our Pfeiffer
Vacuum Service Engineers;
– Return the individual components to the manufacturer for
repairs;
– Replace individual components with a new value
exchange units.
Local Pfeiffer Vacuum representatives can provide full
details.
Before Returning:
➡Dismantle all accessories.
➡Attach a clearly visible notice: “Free of contamination” (to
the unit being returned, the delivery note and accompany-
ing paperwork).
Harmful substances" are substances and preparations as
defined in current legislation. Pfeiffer Vacuum will carry out
the decontamination and invoice this work to you if you have
not attached this note. This also applies where the operator
does not have the facilities to carry out the decontamination
work. Units which are contaminated microbiologically, explo-
sively or radioactively cannot be accepted as a matter of
principle.
Fill out the service request and the declaration on
contamination
➡Download the forms “Service Request” and “Declaration
on Contamination”.1)
➡Fill out the “Service Request” form and send it by fax or
e-mail to your Pfeiffer Vacuum service address.
➡Include the confirmation on the service request from Pfeif-
fer Vacuum with your shipment.
➡Fill out the contamination declaration and enclose it in the
shipment (required!).
Please get in touch with your local Pfeiffer Vacuum represen-
tatives if there are any questions regarding contamination.
Decontaminate units before returning or
possible disposal. Do not return any units which
are microbiologically, explosively or radio-
actively contaminated.
Returning Contaminated Units
If contaminated units have to be returned for
maintenance/repair, the following instructions concerning
shipping must be followed without fail:
➡Neutralise the pump by flushing with nitrogen or dry air.
➡Seal all openings to the air.
➡Seal pump or unit in suitable protective foil.
➡Ship units only in appropriate transport containers.
WARNING

17
Size Unit XtraDry 250-1 XtraDry 150-2
Connections
Vacuum flange DN 25 ISO-KF DN 25 ISO-KF
Exhaust flange DN 25 ISO-KF DN 25 ISO-KF
exhaust silencer exhaust silencer
alternatively alternatively
Pumping speed at 1000 mbar m3/h 13 7.5
Final pressure without gas ballast mbar ≤7≤0.1
Final pressure with gas ballast mbar 20 ≤0,2
Max. permissible intake pressure mbar 1000 1000
Max. permissible intake pressure for mbar < 25 < 25
continous operation
Max. permissible chamber volume hourly or more often < 10 l hourly or more often < 10 l
for cyclic applications daily or less frequent < 30 l daily or less frequent < 30 l
Permissible exhaust pressure mbar ≤ 1100 ≤ 1100
Rotation speed min-1 620 / 950 620 / 950
Water vapor tolerance mbar 2 2
Water vapor acceptable capacity g/h 20 10
Leak rate mbar l/s ≤1 • 10-2 ≤1 • 10-2
Max. operating altitude (a. s. l) m 2000 2000
Ambient permissible temperature range °C +12 ... +40 +12 ... +40
°F 50°F ... 100°F 50°F ... 100°F
Noise level dB(A) < 65 < 65
Motor power supply
50/60 Hz (Europa) V/AC 207 ... 253 207 ... 253
50/60 Hz (USA) V/AC 103 ... 126 103 ... 126
50/60 Hz (Japan) V/AC 90 ... 110 90 ... 110
Nominal motor power W 550 550
Max. input current at nominal voltage
230 V A 6 6
115 V A 11 11
100 V A 11,5 11,5
Motor protection IP 32 IP 32
Weight, approx. kg 30 30
8. Technical Data

18
51,5
150
∅6,6
∅13
106
90˚
113
79
313
25
283
52280
398
128
73
182
143
209
356
DN 25 ISO-KF
DN 25 ISO-KF
DN 25 ISO-KF
8.1. Dimensions
Exhaust flange (only for XtraDry 250-1)
Exhaust flange (alternatively: exhaust silencer)

19
Description Size Number Comments/ Order Quantity
Operating Instructions
Dust separator STP 025 PK Z60 206 PK 0120 BN
Cooling trap KLF 025 PK Z80 006 PD 0015 BN
Elbow, 45° DN 25 ISO-KF PF 125 225 -X
9. Accessories
10. Spare parts
When ordering accessories please be sure to state the full part number. Please use this list as an order form (by taking a copy).
Spare parts package Type No. Consisting of the following parts
Maintenance kit, Basic XtraDry 150-2 / XtraDry 250-1 PU E31 002 -T 46, 100, 101, 106
(Piston seals)
Maintenance kit, Plus XtraDry 150-2 / XtraDry 250-1 PU E31 003 -T 56, 103, 106.1, PO 003 540 (grease syringe)
(Radial shaft seal)
Toolkit, XtraDry XtraDry 150-2 / XtraDry 250-1 PO 006 001 -T Torque wrench (special version), blocking tool,
centering bolt and Allan head screw with disc
Description Number
Silencer PU E37 000 -T
Gas ballast filter PO 003 448
10.1 Spare parts package