Pfeiffer Vacuum MVP 035-2 User manual

Membranvakuumpumpen
Diaphragm Vacuum Pumps
PU 800 011 BE/G (0211)
MVP 035-2,
MVP 055-3, MVP 055-3C
Betriebsanleitung • Operating Instructions

2
1. Safety Precautions.................................. 3
1.1. For Your Orientation........................................................... 3
1.2. Pictogram Definitions........................................................ 3
2. Understanding The Pump ....................... 4
2.1 Main Features..................................................................... 4
2.2. Differences Between The Pump Types.......................... 5
3. Installation............................................... 6
3.1. Setting Up The Pump And Location ................................ 6
3.2. Connection Of Pumping Stages....................................... 6
3.3. Connecting The Vacuum Side.......................................... 7
3.4. Connecting The Exhaust Side .......................................... 7
3.5. Connecting To Mains Power............................................ 7
3.5.1 Adjusting Voltage Selector............................................... 8
4. Operations................................................ 9
4.1. Important Information ....................................................... 9
4.2. Operation With Gas Ballast.............................................. 9
4.3. Shutdown .......................................................................... 10
5. What To Do In Case Of Breakdown? ... 11
6. Maintenance.......................................... 11
6.1. Precautionary Measures During Maintenance Work 11
6.2. Cleaning And Replacing Diaphragms And Valves...... 12
6.2.1.MVP 035-2 ......................................................................... 12
6.2.2.Product-Line MVP 055-3 / MVP 055-3C ........................ 13
7. Service.................................................... 16
8. Technical Data....................................... 17
8.1. Dimensions........................................................................ 18
8.2. Substances Which Come Into Contact With
The Medium ...................................................................... 20
9. Accessories ........................................... 20
10. Spare Parts............................................. 21
Contamination Declaration......................... 22
Conformity Declaration ................... last page
Index
Page
Modifications reserved
Please note!
Current operating instructions are available via
www.pfeiffer-vacuum.de under "Infoservice".

3
Adopt suitable measures to prevent dangers arising from
dangerous or explosive gases and ensure that the materials
of the wetted parts are compatible, see section “Technical
data”.
☞Adopt suitable measures to prevent the release of
dangerous, 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.
Adopt suitable measures to prevent dangers arising from the
formation of explosive fluids or explosive or flammable mixtu-
res.
☞Use inert gas for gas ballast if necessary.
☞The user must take suitable precautions to prevent any
formation of explosive mixtures in the expansion chamber.
In case of a diaphragm crack, mechanically generated
sparks, hot surfaces or static electricity may ignite these
mixtures.
Danger of damage to the pump or system.
Danger of personal injury.
1.2. Pictogram Definitions
1.1. For Your Orientation
Instructions in the text
➡Operating instructions: Here you have to do something!
Symbols used
The following symbols are used throughout in the
illustrations:
Vacuum connection (intake side)
Exhaust connection (outlet side)
Power supply connection
Gas ballast connection
Position numbers
Identical components and accessories parts have the same
position numbers in all illustrations.
V
Important note.
☞
PLEASE NOTE
1. Safety Precautions
☞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.
☞Avoid exposing any part of the body to vacuum.
☞Observe all safety and accident prevention regulations.
☞Check regularly that all safety requirements are being
complied with.
☞Do not carry out any unauthorised conversions or
modifications on the pump.
☞When returning the pump to us please note the shipping
instructions in Section 7.
Danger of burns from touching hot parts.
BEWARE
Danger of an electric shock.
DANGER
Danger of an explosion.
DANGER

4
2.0. Understanding The Pump
2.1. Main Features
K2.1
V
V
A1 D 2.1 U N E
A
C23
A
UE
B
40 A1
23
N
B
V
D2.1UNE
A
40 28 BA1
Diaphragm Vacuum Pump MVP 035-2
A1 Vacuum connection (with hose)
2.1 Exhaust connection (silencer)
A Membrane head 1
B Membrane head 2
E Voltage supply
N Main switch
K Capacitor
U Voltage selector switch
23 Hose connection
40 Gas ballast valve
Diaphragm Vacuum Pump MVP 055-3 with hose connection
A1 Vacuum connection
2.1 Exhaust connection (silencer)
A Membrane head 1
B Membrane head 2
C Membrane head 3
D Membrane head 4
E Voltage supply
N Mains switch
U Voltage selector switch
23 Hose connection
Diaphragm Vacuum Pump MVP 055-3C with small flange connection
A1 Vacuum flange
2.1 Exhaust connection
A Membrane head 1
B Membrane head 2
C Membrane head 3
D Membrane head 4
E Voltage supply
N Mains switch
U Voltage selector switch
28 Hose connection
40 Gas ballast valve
The Diaphragm Vacuum Pumps Series MVP 055-3/3C are
three stage and the pumps of the MVP 035-2 series are two
stage dry compressing pumps. This means that any medium
being pumped is not brought into contact with lubricating
agents.
The pumps are of the displacement type where the movement
of the diaphragm causes a periodic change in the size of the
working chamber. The flow of gas causes the self-acting val-
ves to open and close.
The pumping units are directly connected to the drive motor.
C

5
Pump versions
Standard version = MVP 035-2, MVP 055-3.
C- version = Pump in corrosive gas version:
Pump in corrosive gas version are distinguished from the afo-
rementioned standard versions by the use of corrosive gas
resistant materials in the working chamber which comes into
contact with the media (see Section 8.2 for such materials).
Gas ballast version:
To avoid condensation in the pump, the MVP 035-2, the
MVP 055-3C are fitted with a gas ballast valve as standard.
Motor versions:
All pumps described in that manual are equipped with an
single phase broad range voltage motor.
2.2. Differences Between The Pump Types
Typ Number Max. volume Final pressure, Gas
of flow rate total ballast-
cylinders (m3/h) without / with valve
50/60 Hz gas ballast
MVP 035-2 2 2,1/2,4 4 mbar / 5 mbar yes
MVP 055-3 4 3,3/3,8 2 mbar no
MVP 055-3C 4 3,0/3,5 2 mbar / 4 mbar yes
Proper use
– The Diaphragm Pump MVP pump series may only be used
for the purpose of generating vacuum.
– Do not pump corrosive or explosive gases.
– Do not pump liquids.
– Do not operate the pump in locations where there is an
explosion hazard.
– Accessories other than those named in this manual may
not be used without the agreement of PFEIFFER.
– Do not use the connecting line between the heads of the
pump as a handle.
– The Diaphragm Pumps may not be used for the purpose of
generating pressure.
– Equipment must be connected only to a suitable fused and
protected electrical supply and a suitable earth point.
– Ensure that installation is in compliance with limitations
from the degree of protection, see section “Technical
Data“.
Improper Use
The following are regarded as improper:
– Uses not covered above, and, in particular:
– Connection to pumps and units which is not permitted
according to their operating instructions.
– Connection to units which contain touchable and voltage
carrying parts.
Improper use will cause any rights regarding liability and gua-
rantees to be forfeited.
Features
– Switchable single phase broad range voltage motor.
– Mains connection via cold unit socket with safety strap
(mains cable not included in the standard delivery).
– ON/OFF mains switch.

6
MVP 055-3, MVP 055-3C
The pump is equipped with four separately operating pump
stages A, B, C, D which are connected via hoses to form a
three-stage vacuum pump.
– The vacuum connection A1 is equipped as follows:
MVP 055-3 --> hose connection DN 10
MVP 055-3C --> small flange DN 16 ISO-KF.
– Depending on the pump version, the exhaust connection
2.1. of the MVP 055-3/-3C is fitted as follows:
MVP 055-3 --> silencer (standard), small flange
DN 16 ISO-KF (option).
MVP 055-3C --> corrugated hose DN 10 (standard),
small flange DN 16 ISO-KF (option).
3. Installation
3.1. Setting Up The Pump And Location
Be sure to select the correct pump version whe-
re the pumping of possibly aggressive media are
involved.
➡Place pump on a smooth, even surface.
➡Anchor the pump if it is to be erected in a stationary positi-
on.
– Avoid mechanical stresses due to rigid connections. Ins-
ert elastic hoses or resilient elements as couplings
between the pump and rigid pipes.
➡Maximum ambient temperature +12 ... +40 °C.
– Make sure ventilation is adequate if pump is installed in
a enclosure or if ambient temperature is elevated.
– If pump is installed above 1000 m above mean sea level
check compatibillity with applicable safety require-
ments, e. g. DIN VDE 0530 (motor may overheat due to
insufficient cooling).
3.2. Connection of Pumping Stages
➡Check the hose connections for the correct type of
connecting pieces before connecting the pump to the
vacuum chamber.
– Intake and outlet connections are marked with “IN” and
“EX” respectively at the membrane heads.
Interchanging the connections will result in
impermissibly high over-pressure levels.
MVP 035-2
The pump functions on the two stage principle.
On the two membrane heads A and B the intake connection is
marked with an “IN” and the exhaust connection with an
“EX” to prevent confusion.
– The vacuum connection (intake side) is provided with a 1m
plastic hose and G 1/4“ screw (option: small flange) for
connection to a PFEIFFER turbopump.
– The exhaust connection of the MVP 035-2 is provided with
a silencer and can also retrovit to small flange connection.
PU011persp
MVP 055-3C with small flange
A1 Vacuum connection with small
flange DN 16
IN Vacuum connection at membrane
heads
2.1 Exhaust connection
EX Exhaust connection at membrane
heads
A Membrane head 1
B Membrane head 2
C Membrane head 3
D Membrane head 4
E Voltage supply
28 Hose connection
40 Gas ballast valve
D
E
A1 A EX
B
28
C
28
EX
IN
V
IN 2.1(EX)
IN
40

7
3.5. Connecting To Mains Power
The pump is driven by AC motors with the following possible
variants:
Power connections must comply with local
regulations. Voltage and frequency information
given on the rating plate must correspond to the
mains voltage and frequency values. The pump
may only be connected to mains current with
earthed conductor.
A thermostatic self-locking coil protection auto-
matically switch off the motor by over-heating.
➡Switch off pump the pump or isolate the equipment from
mains, wait appr. five minutes for cooling down, before
restarting the pump.
Connect diaphragm pumps in the pumping stati-
on according wiring diagram in operating
instructions PT 800 030 BN of the Backing Pump
Relay Boxes.
☞
PLEASE NOTE
3.3. Connecting The Vacuum Side
➡Remove locking cap on intake connection.
➡Make connection between the vacuum system and pump
as short as possible.
➡Connect pump with intake connection to the apparatus.
➡If liquid - which would generate vapours - is present in the
system to be evacuated, a condensate trap must be fitted
upstream of the pump.
3.4. Connecting The Exhaust Side
Pressure can rise to dangerous levels in exhaust
lines. Therefore, lay exhaust side lines without
shut-off units. Do not connect the exhaust side
with a closed system on account of the danger
of bursting. For the maximum counter pressure
values at the exhaust please refer to Section 8, Technical
Data.
– If, for internal operating reasons, a shut-off unit has been
fitted or if there is a danger that over-pressures can build
up in the lines, the local accident prevention regulations
must be observed.
In certain applications, exhaust gases and
vapours can be very hot and represent a health
and/or environment hazard.
➡Lay lines from the pump sloping downwards so that
condensate cannot run back into the pump, otherwise fit a
separator.
Connection with Relaisbox at TC 600 for intermittend operation
Backing pump
MVP line
Relaisbox
PM 041 937 AT

8
X
A
Y
3.5.1. Adjusting Voltage Selector
3.4.a Voltage Selector Switch U On The Terminal Box Cover
A Setting range marking
X Position "230", voltage range (200.....240V; 50/60Hz)
Y Position "115", voltage range (100.....120V; 50/60Hz)
The respective single phase mains voltage must be checked
before each installation or re-location of the diaphragm
pump.
Use an appropriate screwdriver on the diaphragm pump
voltage selector switch to select the range which
corresponds with the mains voltage provided (please see
Figure 3.4a).
Be sure to disconnect the pump from mains
power before changing the voltage range.
Prior to switching on the pump always check
the voltage range which has been set on the
pump terminal box..

9
4.1. Important Information
Use only “C” version pumps where the pumping
of corrosive gases is involved.
The diaphragm and valves will suffer damage if
fluids are pumped over lengthy periods!
Before starting, ensure that impermissibly high
pressures cannot build up on the pressure side.
Interchanging the connections causes
dangerous excess pressure levels.
Do not start the pump if pressure difference
between inlet and outlet exceeds max. 1 bar.
Attemps to start pump at higher differential
pressure may cause the motor to jam and
damage may result.
4. Operations
Gas ballast valve 40
43 Top
X Valve open
Y Valve closed
43
4.2. Operation With Gas Ballast
Let the pump run with gas ballast to reduce condensation of
pumped substances (water vapour, solvents, ....) in the pump.
Opening the gas ballast valve
➡Turn the top 43 of the gas ballast valve 40 to the position Y
(open).
With gas ballast valve open ultimate vacuum
will be reduced, pumping speed is decreased.
In case of low boiling solvents when the forma-
tion of condensate is unlikely, the use of gas
ballast might be unnecessary.
Operating the pump without gas ballast increa-
ses the solvent recovery rates at the exhaust waste vapour
condenser.
☞
PLEASE NOTE
Important notes regarding the use of gas ballast
Make sure that air/gas inlet through the gas
ballast valve never lead to hazardous, explo-
sive or otherwise dangerous mixtures. If in
doubt, use inert gas.
When using air rather than inert gas, risk of sig-
nificant damage to equipment and/or facilities,
risk of personal injury or even loss of life exists
due to the formation of hazardous and/or explo-
sive mixtures if air and pumped media react
inside or at the outlet of the pump.
Do not pump vapour before pump has reached
its operating temperature and with gas ballast
valve closed.
If the pump is subjected to condensates it
should be allowed to run for a few minutes
under atmospheric pressure before switching
off.
☞
PLEASE NOTE
DANGER
XY

10
Starting the pump
The pump can be switched on and off at all times.
When starting the pump or system and when the presence of
vapour is to be anticipated it is recommended to open the gas
ballast valve in advance.
If the intake pressure of the pump increases or
is unusually high, the valve can also be opened
when the pump is running. Once the final pres-
sure has stabilised the valve can again be clo-
sed.
When the pump is running, surfaces and motor
casing become hot.
The pump attains the stated values for through-
put rates and final pressure levels only once
the operating temperature is reached (after
approximately 15 minutes).
☞
PLEASE NOTE
BEWARE
☞
PLEASE NOTE
4.3. Shutdown
Short-term after formation of condensate:
➡Allow the pump to continue to run at atmospheric pressure
for a few minutes.
➡Check and clean pump heads if the pump has been
exposed to media which may damage the pump materials
or forms deposits.
Long-term:
➡Take measures as described in section short-term shutdo-
wn.
➡Separate pump from the apparatus.
➡Close gas ballast valve.
➡Close inlet and outlet port (e. g. with transport caps).
➡Store the pump in dry conditions.

11
All pump bearings are arranged outside the working
chamber, are enclosed and have lifetime lubrication. Under
normal operating conditions the pumps need no servicing.
It is not necessary to check the operating fluid. Valves and
diaphragms are subject to wear and tear. At the latest when
the attained pressure levels begin to deteriorate the
diaphragms and the valves should be cleaned and checked
for cracks.
6.1. Precautionary Measures During
Maintenance Work
Whenever working on the pump ensure the
motor cannot get switched on.
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; only use genuine parts as per the spare parts list
when carrying out inspection work.
➡Use only benzin or the like for cleaning. Do not use
solvents.
Ensure compliance with local regulations when
working with solvents.
Toxic gases and vapours can arise when carry-
ing out inspection work on corrosive gas versi-
on pumps (“C”). Pumps must be
decontaminated before inspection. Only
qualified personnel are permitted to carry out
maintenance and repair work and the regulations must be
observed.
6. Maintenance
Problem Possible cause Remedy
Pump does not attain final pressure •Condensate in the pump •Run pump for a longer period under
atmospheric pressure; open gas ballast valve.
•Open gas ballast valve •Close gas ballast valve.
•Valves/diaphragms •Clean or replace valves and diaphragms,
defective/dirty see section 6.
•Leak in system •Repair leak.
Unusual operating noises •Valves/diaphragms defective •See maintenance in section 6.
•Dirt in the working chamber •Clean working chamber.
•Silencer loose or missing •Check silencer; clean or replace.
•Valves defective •Change valves.
•Motor fan defective •Change motor fan.
•Con-rod or motor bearing defective •Inform Pfeiffer-Service.
Pump does not start •No mains voltage •Check control voltage (see section 3.5.)
•Phase failure •Check fuse.
•Motor contactor switch has •Switch off pump the or isolate the pump from
mains, wait appr. five minutes for cooling
down, before restarting the pump.
•Ambient temperature < 12 °C •Warm pump.
•Dirty valves/diaphragms • See maintenance in section 6.
•Over-pressure in the exhaust line •Open exhaust line (open exhaust valve).
Pump switches off •Sticking diaphragms • Clean pump (see section 6.).
•Wrong mains voltage • Correct as per rating plate.
5. What To Do In The Case Of Breakdowns ?

12
6.2. Cleaning And Replacing Diaphragm And
Valves
6.2.1. MVP 035-2
➡Allow the pump to cool down before beginning
dismantling.
➡Detach the pump from the pumping system and ensure the
motor cannot get switched on.
➡Screw off hose connection between the pump stages.
➡Remove the cheesehead screws 26 (four per pump stage).
➡Remove housing cover 1 with head cover K1/K2 taking
care to prevent head cover 2 falling out of housing cover 1.
➡Check diaphragm pair 10 for damage and replace as
necessary.
The two membrane heads have differing head
covers K1/K2. When servicing take care not to
interchange these two parts. Head cover K1
has, on the intake side, an additional groove in
the valve seating.
➡Remove head cover K1/K2 from housing cover 1 to check
valve seals 11.
➡Taking care with the position of valve seals 11, remove and
check for damage, and replacing if necessary.
➡Clean all parts.
➡Re-assemble pump in reverse order.
MVP035ohnePos
MVP 035-2
A1 Vacuum inlet with hose connection
1 Housing cover
K1 Head cover inlet side
K2 Head cover outlet side
2.1 Silencer
2.3 Sealing ring
17 6 4 D 9 10 16 11 1 26
A1 K1 3 K2 2.1
40
2.3
2.3
1
2.3
3 Diaphragm spring washer
4 Con-rod
6 Housing panel
9 Diaphragm support washer
10 Double diaphragm
11 Inlet and outlet valve seal
16 Countersunk screw
17 Countersunk screw
D Tolerance ring
26 Cheesehead screw
40 Gas ballast valve
V

13
Changing the Diaphragm
➡Dismantle pump stage as per Section 6.2.1.
➡Remove screw 16. Caution, this screw has been stuck to
make secure against loosening.
➡The underlying diaphragm support washer 9 must be
removed with the utmost care.
➡Unscrew housing panel 6.
It is possible that spacers have been fitted
between the drive con-rod and the diaphragm
support washer for the purpose of compensati-
on. These spacers must be re-fitted at the same
height.
➡If it is difficult to part the old diaphragm from support was-
her 9, apply e.g. naphtha or paraffin.
➡If necessary, re-fit spacers under the lower diaphragm
support washer 9. Fix in place with a little grease to
prevent them falling down.
➡Fit new diaphragm 10 and diaphragm support washer 9.
The diaphragm is a double diaphragm of total
thickness 1.6 mm. The diaphragms are specially
selected and are supplied in pairs with a
maximum tolerance of 1.6 ± 0.05 mm.
Replacement diaphragms must be selected on
the same basis.
➡Fit diaphragm support washer 3.
➡Place some adhesive (e.g. Loctite 601) under the head of
screw 16 and screw in diaphragm and spring washer.
➡Further assembly in reverse order.
☞
PLEASE NOTE
6.2.2. Product-Line MVP 055-3 / MVP 055-3C
Cleaning
➡Detach the pump from the vacuum system and ensure the
motor cannot get switched on.
➡Unscrew connecting hose between the respective pump
stages.
➡Remove screws 26 and take off housing cover 1.
➡Taking care with the position of valve seals 11 (Fig. 9),
remove and check for damage, and replacing if necessary.
The inlet valve seal in the third stage and the
outlet valve seal 11a in the second stage differ
from all other inlet and outlet valve seals 11b.
Take care not to interchange.
➡Lift up head cover 2 and check diaphragms 10 for wear
and tear and replace as necessary.
➡Clean all parts.
➡Re-assemble pump in reverse order. When assembling,
the pump should be positioned so that the pump stage to
be fitted is on top. The parts are then placed on top into
position.
Changing the Diaphragms on MVP 055-3
➡Dismantle as described Section 6.2.2.
➡Remove screw 16. Caution, this screw has been stuck into
position and sealed.
➡Screw off screws 17 and remove housing panel 6.
➡Remove diaphragm 10. The diaphragms are usually stuck
to the housing and should be carefully pushed out from the
con-rod space by hand.
It is possible that spacers have been fitted
between the drive con-rod and the diaphragm
support washer for the purpose of compensati-
on. These spacers must be re-fitted at the same
height. They must not be interchanged with
another stage.
➡If the old pair of diaphragms 10 cannot be parted from dia-
phragm support washer 9, apply naphtha or paraffin.
➡Clean the parts in naphtha and check for wear and tear,
replacing defective parts as necessary.
➡If necessary, re-fit spacers under
the lower diaphragm support washer 9. Fix in place with a
little grease to prevent them falling down.
➡Fit diaphragm support washer 9 onto con-rod 4.
➡Fit new pair of diaphragms 10.
☞
PLEASE NOTE

14
The diaphragm is a double diaphragm of total
thickness 1.6 mm. The diaphragms are specially
selected and are supplied in pairs with a
maximum tolerance of 1.6 ± 0.05 mm.
Replacement diaphragms must be selected on
the same basis.
➡Fit diaphragm support washer 9.
➡Place some adhesive (e.g. Loctite 601) under the head of
screw 16 and screw in diaphragm and spring washer.
➡Further assembly as per Section 6.2.2.
☞
PLEASE NOTE
11a 12 9
26 1 11b 2 16 3 10 4 6 17
2.3
2.3
2.3
10 Diaphragm
11a Inlet valve seal 3. stage and outlet valve seal 2. stage
11b Inlet and outlet valve seal (standard)
12 O-ring (only for pump with leak rate reduction)
16 Countersunk screw
17 Countersunk screw
26 Cheesehead screw
MVP 055-3
1 Housing cover
2 Head cover
2.1 Silencer
2.3 Seal ring
3 Diaphragm spring washer
4 Con-rod
6 Housing panel
9 Diaphragm support washer
2.1
V

15
MVP 055-3C
1 Housing cover
2 Head cover
3 Diaphragm spring washer
4 Con-rod
6 Housing panel
9 Diaphragm support washer
10 Double diaphragm II
11 Inlet and outlet valve seal II
14 Square connecting screw (not shown in the drawing)
16 Countersunk screw
17 Countersunk screw
23 Connecting hose
26 Cheesehead screw
40.1 Gas ballast elbow union
40.2 Rubber cap for gas ballast
elbow union
11 9 23
26 1 11 2 3 10 4 6 17
Changing the Diaphragms on MVP 055-3C
➡Dismantle pump stages as per Section 6.2.2.
➡In addition, the front housing cover panel 6 must be
dismantled.
➡Using a standard trade face spanner (size 40/4) turn
diaphragm support washer 9 thereby loosening diaphragm
10.
➡Remove diaphragm spring washer 3 with square
connecting screw 14 (not shown in the drawing),
diaphragm 10 and diaphragm support washer 9.
➡Check that square connecting screw 14 is still firmly
positioned in diaphragm spring washer 3 and tighten if
necessary (left-hand thread).
➡Fit new diaphragm 10 between diaphragm spring washer 3
and diaphragm support washer 9.
➡Refit diaphragm 10 with spring washer and support washer
in reverse order.
➡Fit housing cover 6.
➡To fit the PTFE connecting hose 23, tighten the metal lock
nut by hand and then by a half a turn with an Allen key.
V
40.2
40.1

16
7. Service
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.
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
Service Center.
Contact Addresses And Telephone Hotline
Contact addresses and service hotlines can be found on the
back cover of these operating instructions.
☞
PLEASE NOTE
Do Make Use Of Our Service Facilities
In the event that repairs are necessary to your 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
Service Engineers;
– Return the individual components to the manufacturer for
repairs;
– Replace individual components with a new value
exchange units.
Local PFEIFFER 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 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, explosively
or radioactively cannot be accepted as a matter of principle.
Fill Out The Contamination Declaration
➡In every case the "Contamination Declaration" must be
completed diligently and truthfully.
➡A copy of the completed declaration must accompany the
unit; any additional copies must be sent to your local
PFEIFFER Service Center.
Please get in touch with your local PFEIFFER representatives
if there are any questions regarding contamination.

17
8. Technical Data
Feature Unit MVP 035-2 MVP 055-3 MVP 055-3C
Connections
Intake side1) hose connection with G 1/4“ hose connection with G 1/4“ Small flange DN 16
swivelling screw fitting swivelling screw fitting
Pressure side G 1/4“ with silencer G 1/4“ with silencer Hose connection (ø 10 mm)
Number of cylinders 2 4 4
Nominal volume flow rate at
50 Hz m3/h 2,1 3,3 3,0
60 Hz m3/h 2,4 3,8 3,5
Final pressure, absolut
without/with gas ballast mbar 4,0 / 5,0 2 / - 2 /4
Permissible exhaust pressure mbar 1100 1100 1100
Integral leak rate mbar l/sec 0.1 0.1 1
Max. permissible gas- and
environment temperature °C + 12 ... + 40 + 12 ... + 40 + 12 ... + 40
Overload protection
(with enclosed temperature switch ) °C + 155 + 155 + 155
Noise level dB(A) ca. 49 ca. 52 ca. 52
Motor (insulation material class B) IP 54 IP 20 P 20
Motor voltage at 50/60 Hz V 100 ... 120/200 ... 240 100 ... 120/200 ... 240 100 ... 120/200 ... 240
Motor power W 180 200 200
Nominal rotation speed at 50/60 Hz 1/min 1500/1800 1500/1800 1500/1800
Power take-up at
50/60Hz A 3,6/3,8 ... 1,7/1,8 3,8/4,0 ... 1,9/2,0 3,8/4,0 ... 1,9/2,0
Weight, approx. kg 10,5 16 16,5
1) Hose connection ø 10/8 x 1000 mm
Delivery consignment: Main switch cold unit socket with safety strap, voltage selector switch, motor with self-locking coil protection, rubber feet and handle. Mains cable
not included in the standard delivery consignment (please see accessories).

18
8.1. Dimensions
134
17
263
171
235
71
192
ca. 263
103
262
125
MVP 035-2

19
ca. 189
281
314 (321)
143 134
ca./approx. 235 (241)
ca./approx. 262 (266)
ca. 184
M6
MVP033-3C
MVP 055-3, MVP 055-3C
Measurements in brackets only valid for MVP 055-3C

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9. Accessories
Pump components Substances in contact with the
media
Double diaphragm (1.6 mm thick) FPM (Viton), reinforced
Diaphragm spring washer Aluminium alloy
Head cover Aluminium alloy
Valves FPM (Viton)
Housing cover Aluminium alloy
Fittings Aluminium alloy, anodised
Connecting hose Polyethylen
Seals Steel/FPM (Viton)
Countersunk screw
(diaphragm spring washer) Stainless steel
Silencer Aluminium/PE
Intake port Stainless steel
8.2. Substances Which Come Into Contact
With The Medium
Standard version MVP 035-2 and MVP 055-3
Pump components Substances in contact with the
media
Diaphragm (1,2 mm thick) PTFE coated,
reinforced Neopren
Diaphragm spring washer ECTFE (Halar), coated stainless
steel
Head cover Reinforced PTFE
Valves Perfluoro-elastomer (Kalrez)
Housing cover, inner part Reinforced PTFE
Fittings ETFE (Tefzel)
Connecting hose PTFE
Hose nipple ETFE (Tefzel)
Intake port Stainless steel
Corrosive gas version pump MVP 055-3C
Pos. Description Piece Size Order Number Comment Ordered Quantity
Mains cable for individual wiring 1 3 m PK 050 111 not included in the
and for connecting to TC 600 delivery consignment
via relay box
Mains cable 230 V, with schuko plug,
EURO Counter plug CEE 22 1 2 m PK 050 109 not included in the
delivery consignment
Mains cable 115 V, UL
EURO Counter plug CEE 22 1 2 m PK 050 110 not included in the
delivery consignment
Small flange connection with seal ring 1 DN 16 ISO-KF PK 050 114-T not included in the
for MVP 035-2 (for intake or outlet side) delivery consignment
Small flange connection with seal ring 1 DN 16 ISO-KF PK 050 115-T not included in the
for MVP 055-3 (for inlet side) delivery consignment
Small flange connection with seal ring 1 DN 16 ISO-KF PK 050 114-T not included in the
for MVP 055-3 (for outlet side) delivery consignment
Small flange connection with seal ring 1 DN 16 ISO-KF P0 920 746 E not included in the
for MVP 055-3C (for inlet side) delivery consignment
Relay box for TC 600 connection PM 041 937 AT