DVP DC.16DEX Manual

VACUUM
TECHNOLOGY
OPERATING AND MAINT ENANCE
INSTRUCTIONS
(Translation of the original instructions)
OI -BATH VANE VACUUM PUMPS
DC.16DEX
www.dvp.it - [e-mail]

Dear Customer,
Thank you for choosing a D.V.P. Vacuum Technology s.p.a. product.
Our commitment to supplying increasingly efficient products and
the constant care of the production processes make D.V.P.
Vacuum Technology s.p.a. an ideal partner for helping its clientele
to reach its objectives. or this reason, our customers are the focus
of our attention and we promote the sending of suggestions and/or
proposals for improvements that could be applied to our products
or company processes. Please visit our website (www.dvp.it) for
further information on the other D.V.P. Vacuum Technology s.p.a.
products and to get in touch with our staff.
Best Regards,
Mario Zucchini (Chairman)
D.V.P. Vacuum Technology s.p.a.

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INDEX
1 INTRODUCTION .................................................................................................................................................... 2
1.1 GENERAL INFORMATION.............................................................................................................................. 2
1.2 MANUFACTURER INFORMATION ................................................................................................................ 2
1.3 METHOD OF CONSULTATION ...................................................................................................................... 2
1.4 PERSONNEL QUALIFICATIONS .................................................................................................................... 2
1.5 PERSONAL PROTECTION EQUIPMENT ...................................................................................................... 3
1.6 INFORMATION PLATE ................................................................................................................................... 3
1.7 MARKING ........................................................................................................................................................ 3
2 SAFETY ................................................................................................................................................................. 4
2.1 GENERAL WARNINGS ................................................................................................................................... 4
2.2 RESIDUAL RISKS ........................................................................................................................................... 4
2.3 PICTOGRAMS ................................................................................................................................................. 5
3 PUMP DESCRIPTION ........................................................................................................................................... 6
3.1 INTENTED USE AND CONTRAINDICATIONS ............................................................................................... 6
3.1.1 INTENTED USE ........................................................................................................................................... 6
3.1.2 CONTRAINDICATIONS ............................................................................................................................ 6
3.2 NOISE EMISSION ........................................................................................................................................... 6
3.3 DIMENSIONS AND CHARACTERISTICS ....................................................................................................... 7
4 INSTALLATION ..................................................................................................................................................... 8
4.1 RECEIPT AND CONTENT VERIFICATION .................................................................................................... 8
4.2 PACKAGING ................................................................................................................................................... 8
4.3 TRANSPORT AND HANDLING ....................................................................................................................... 8
4.4 STORAGE ....................................................................................................................................................... 8
4.5 ENVIRONMENTAL CONDITIONS ..................................................................................................................
4.6 PUMP INSTALLATION ....................................................................................................................................
4.7 MOTOR INSTALLATION ............................................................................................................................... 10
4.8 USER SYSTEM ............................................................................................................................................. 10
4. CONNECTION ............................................................................................................................................... 10
4. .1 INTAKE AND OUTLET CONNECTIONS ................................................................................................ 10
4. .2 WIRING ................................................................................................................................................... 11
5 OPERATING INSTRUCTIONS ............................................................................................................................ 12
5.1 OPERATION .................................................................................................................................................. 12
5.1.1 FILLING THE OIL TANK ............................................................................................................................ 12
5.1.2 START-UP .............................................................................................................................................. 12
5.1.3 OIL CLEANING ....................................................................................................................................... 13
5.1.4 STOP....................................................................................................................................................... 13
6 MAINTENANCE ................................................................................................................................................... 14
6.1 GENERAL WARNINGS ................................................................................................................................. 14
6.2 MAINTENANCE TABLE ................................................................................................................................ 14
6.2.1 CHECK OIL LEVEL ................................................................................................................................. 14
6.2.2 CHANGE OIL .......................................................................................................................................... 15
6.2.3 CHECK AND CLEAN GAS BALLAST ..................................................................................................... 15
6.2.4 CLEAN MOTOR FAN GUARD AND CLEAN THE PUMP ...................................................................... 15
6.2.5 CHANGE VANES .................................................................................................................................... 15
6.3 SPARE PARTS .............................................................................................................................................. 16
7 HOW TO RETURN THE PUMP ........................................................................................................................... 17
8 DISMANTLING .................................................................................................................................................... 18
9 TROU LESHOOTING ......................................................................................................................................... 19

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1 INTRODUCTION
1.1 GENERAL INFORMATION
This manual is meant to provide you with important information for the safety of persons involved in pump use and
maintenance.
This manual, originally written in ITALIAN, is an integral part of the pump and must be preserved with care for the
life of the pump itself. In the event of sale, lease or loaned use of the pump, it must be delivered to the new user
along with EC declaration of conformity.
Carrying out any operations on the pump before reading and fully understanding all instructions in this manual is
prohibited.
The images contained in this document are examples only and are not binding for the Manufacturer. The
Manufacturer reserves the right to make changes to components, product improvement parts and any other without
updating this manual, if said components or parts do not alter pump operation and safety.
1.2 MANUFACTURER INFORMATION
D.V.P. Vacuum Technology s.p.a.
Via Rubizzano, 627
40018 - S. Pietro in Casale (BO) - ITALY
Ph [phone]
Fx [phone]
e-mail: [email protected]
web site: http://www.dvp.it
Please always include the following information in all communications regarding the pump:
• pump model and serial number
• year of manufacture
• date of purchase
• detail information regarding problems verified
1.3 METHOD OF CONSULTATION
For improved understanding of the information provided in this manual, warnings or instructions considered critical
or hazardous are marked with the following symbols:
HAZARD
Failure to comply with these instructions may cause hazards to persons and cause sources of
ignition of potentially explosive atmospheres (ATEX).
WARNING
Failure to comply with these instructions may cause damage to the pump.
1.4 PERSONNEL QUALIFICATIONS
To ensure that all operations performed on the pump are carried out safely, operators must have the qualifications
and requirements to carry out its operations.
Operators are classified as follows:
FIRST LEVEL OPERATOR:
Unqualified personnel, having no specific skills, able to perform simple tasks only.
MECHANICAL MAINTENANCE OPERATOR:
Technician qualified to work on mechanical parts to carry out any necessary adjustments, maintenance
or repairs. Not qualified to work on electrical systems in the presence of voltage.
ELECTRICAL MAINTENANCE OPERATOR:
Technician in charge of all operations of an electrical nature. Can operate in the presence of voltage
inside cabinets and connector boxes.
HAZARD
The qualified technician must have the necessary expertise in the field of on site systems in
ATEX classified areas.

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1.5 PERSONAL PROTECTION EQUIPMENT
This manual assumes that the pump has been installed in workplaces, which comply with all mandatory safety
requirements; in particular, it is mandatory that personnel are equipped with personal protective equipment in
relation to the activities that must be performed.
1.6 INFORMATION PLATE
All pumps are equipped with an identification plate that contains the manufacturer's name, address, CE marking,
ATEX marking and technical data of the pump itself.
WARNING
Removing or tampering with the identification plate is strictly prohibited.
1.7 MARKING
This pump has been certified with the following marking:
II 3/- G IIC c T4 X
Where:
CE label indicating compliance with Directive 4/ /EC (ATEX)
Construction label suitable for use in potentially explosive atmospheres ATEX
II Equipment unit; I =underground II =surface
3/-
Category of the equipment; pump in category 3 internal , NOT ATEX certified for the external surface.
"Category 3 comprises equipment designed to operate in accordance with operating parameters
established by the manufacturer and ensuring a normal level of protection. The equipment in this
category is intended for environments where it is unlikely that explosive atmospheres are produced that
are caused by gases, vapours, mists or mixtures of air and dust, and if occurring only for a short time.
The equipment in this category guarantees the required level of protection during normal operation. "
G Type of explosive atmosphere; G = Gas, Vapours, Mists D =Dust
IIC
Class of Gas; the gas can be group IIA, IIB or IIC
c Type of protection used; c =Constructional safety
T4 Temperature class; T4 :Maximum temperature of exposed surfaces = 135°C
X
Additional marking; Working Ambient Temperature required +12°C ÷ +40°C
HAZARD
Read carefully the meaning of the marking of the pump since this determines important
conditions of use in potentially explosive atmospheres (ATEX).

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2 SAFETY
2.1 GENERAL WARNINGS
L’atmosfera esplosiva costituisce un grave pericolo per la salute dei lavoratori e pertanto devono essere
attivate tutte le misure di prevenzione possibili, in accordo con le normative locali vigenti.
Gli impianti elettrici installati in zona classificata ATEX sono soggetti a denuncia all’INAIL e verifica
periodica biennale da parte dell’ASL/ARPAV.
It is important to read this manual before performing any operation on the pump. Compliance with the safety
standards of the country in which the pump is installed and requirements of qualified personnel for various
maintenance, use, installation, etc. are recommended throughout the life of the pump.
The main rules of conduct to be observed for operation at a suitable level of security are the following:
• Installation, operation, maintenance, etc. operations should always be performed by qualified, trained personnel.
• Without exception, always wear necessary personal protective equipment.
• Always perform all cleaning, adjustment and maintenance operations with all power equipment cut off.
• Do not direct water jets toward electrical parts, even if they are protected by enclosures.
• Do not smoke during work or maintenance, especially where solvents or flammable materials are being used.
• Do not damage symbol plaques or pictograms on the pump. If they should accidentally become damaged,
immediately replace them with other identification plaques.
D.V.P. Vacuum Technology s.p.a. disclaims any liability for damage to persons or property resulting from improper
use of the pump, from tampering with its safety apparatus or failure to observe operational safety standards.
2.2 RESIDUAL RISKS
HAZARD
This pump has been designed to minimise residual risks to personnel. We urge you, however, to
take the utmost care and attention in carrying out maintenance operations. The confidence gained
with frequent contact with the pump too often leads users to forget or underestimate risks.
High temperature hazard
Pump surfaces can exceed a temperature of 70°C. Install the pump in a protected area that is accessible only by
authorised personnel and only perform operations when the pump is stopped and cooled.
Hazard generated by low pressure
Avoid contact with pump intake attachment during operation. Before any interventions, isolate the pump from the
system, introduce air into the intake circuit and clean the area with an ATEX atmosphere. Contact with low pressure
points can cause accidents.
Hazard generated by pressure
The pump tank is pressurised. Do not open and do not leave oil filler or drain plugs open during operation.
Danger of emission of an ATEX atmosphere
The pump will draw fluids, gases or vapours containing potentially explosive atmospheres (ATEX) The
intake/discharge connections and the filling/draining oil caps must be securely tightened and properly connected to
the system in order to avoid contamination of the working environment with an ATEX atmosphere.
Danger from the emission of harmful and/or explosive substances
The pump exhaust air contains traces of oil mist and an ATEX atmosphere; check the compatibility of the oil with
the system operator and that the discharge of the pump is securely connected to prevent the escape of an ATEX
atmosphere into the working environment.
Faults or wearing of seals may cause oil lubricant leaks and an explosive atmosphere. Avoid dispersion in soil, the
pollution of other materials and the emission of an ATEX atmosphere.
Whenever air containing hazardous substances are sucked in (i.e. biological or microbiological agents), use
abatement systems placed before the vacuum pump. Used oil must be disposed of according to applicable
regulations in the country of pump use.
Electrical hazard
Electrical equipment in the pump includes live parts which, upon contact, can cause serious damage to persons and
property. Any kind of intervention on the electrical system must be performed by qualified personnel.
Fire and/or explosion hazard
Use of the pump in areas that are inconsistent with its marking, for any uses not provided for or prohibited by this
manual as well as a lack of proper maintenance can cause malfunction with a risk of overheating, fire or explosions.
In case of fire, do not use water to extinguish the flames, but use dry chemical or CO2 or other means compatible
with the presence of electrical equipment and lubricants.

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Slip and fall hazards
The “L” series vacuum pumps use lubricant to operate. A simple maintenance or improper use not complying with
the instructions included in this manual can damage the gaskets and/or seals and cause the lubricant to spill on the
floor constituting slip and/or fall hazards for personnel.
Entanglement hazard
There is a permanent impending hazard of entangling or entrapping hair and clothing in the cooler fan inside the
guard near the fan casing on the electric motor. Tie long hair up and do not wear baggy clothing, long laces or other
items that could get caught up.
Part projection hazard
Install the pump in order to avoid those in charge of works being directly hit by parts or bits of parts flying through
the fan cover casing due to the cooling fan breaking.
2.3 PICTOGRAMS
Pictographs with the warning symbols and safety symbols for operators have been applied to the pump. Read
carefully and take note of the symbols and their messages before using the pump.
ELECTRICAL HAZARD
The pump is near electrical connections (protected) but where accidental contact can cause
electric shock and death.
HOT SURFACE HAZARD
The pump is close to surfaces with temperatures exceeding 70°C which may lead to burns of
medium severity.
EARTH
Electrical connection point to earth the pump.
D.V.P. Vacuum Technology s.p.a. disclaims any liability for damage to persons or property due to non-compliance
with instructions indicated in pictograms or their improper preservation.

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3 PUMP DESCRIPTION
3.1 INTENTED USE AND CONTRAINDICATIONS
3.1.1 INTENTED USE
The pumps described in this manual are of the rotary vane oil bath type. These pumps are specifically
designed for ATEX Zone 2 suction from clean air, flammable gas from IIA, IIB and IIC units or small
amounts of water vapours and must be installed in NON ATEX classified environments; their marking and
certification and for internal ATEX (see 1.7 "Marking" of this manual).
The temperature of the fluid, gas or vapour produced by the pump and that from the environment in which
it is installed must be between +12°C and +40°C.
HAZARD
The user must pay particular attention to the Marking of the pump.
Any other use is prohibited. The Manufacturer is not liable for any damage to persons and/or property caused by
improper use or not allowed use of the pump.
This pump is suitable for emptying closed containers with a capacity that the pump can reach the final pressure in
less than 20 minutes.
3.1.2 CONTRAINDICATIONS
The pump cannot work with the intake completely open for more than 10 minutes.
Any use other than that for which the pump was constructed is to be considered an
abnormal condition and therefore can cause damage to the pump and pose a serious
danger to the operator.
Below is a series of operations involving improper use of the pump, which are not permitted under any
circumstances.
• Do not install and/or use the pump in an ATEX classified environment; The pump is certified and marked for
internal ATEX (see 1.7 "Marking" of this manual). The use of the pump in an environment where the presence
of ATEX atmospheres has been detected can cause explosions or fires;
• Do not use non-original spare parts or parts not provided by the manufacturer.
• Do not use the unit to pump solid materials, chemicals, powders, solvents or other substances differing from
those permitted These types of materials may damage the unit, degrade its performance or reduce its life.
• do not expose the pump to rain, steam or excessive humidity.
• Do not place or store near in the proximity of flammable or combustible materials or substances.
• Do not use the pump as a compressor.
3.2 NOISE EMISSION
This pump has been designed and constructed to reduce noise at its source.
The sound pressure levels contained in the table of technical specifications were measured at maximum vacuum
and outlet conveyed according to UNI EN 2151.

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3.3 DIMENSIONS AND CHARACTERISTICS
A
B
7
6
5
2
1
3
4
A Intake 4 Motor fan guard 9 Terminal board
Air outlet 5 Oil filler plug
10 Lifting eyebolts
1 Gas ballast 6 Oil sight glass 11 Information plate
2 Start / Stop switch (only 1~) 7 Oil drain plug 12 Attachment point
3 Motor rating plate 8 Power cable (only 1~)
TECHNICAL SPECIFICATIONS DC.16DEX
50 Hz 60 Hz
Number of stages 2
Nominal pumping speed m³/h 17,0 21,0
Pneurop pumping speed m³/h 16,0 17,0
Total final pressure (Abs.) mbar - hPa 0,005
Partial final pressure (Abs.) (Mc Leod) mbar [micron] 0,0005 [0,37]
Final pressure with gas ballast (Abs.) mbar - hPa 0,08
Max inlet pressure for water vapour mbar - hPa 17 23
Max water vapour pumping rate Kg/h 0,22 0,35
Motor power kW (1~/3~) 0,75 / 0,55 0, 0 / 0,66
Nominal r.p.m. n/min 1400 1700
Noise level (UNI EN ISO 2151) (K 3dB) dB(A) 52 54
Weight kg (1~/3~) 25,5 / 22,5
Type of oil cod. DVP SW100
Oil quantity Min÷Max dm³ 0,62 ÷ 0,80
Pump Intake / Outlet DN25 / 1/2“G
Operating temperature * °C +60 ÷ +65
Required room temp. for place of installation °C +12 ÷ +40
Temperature of the fluid, gas or vapour processed °C +12 ÷ +40
Ambient temperature for storage/transport °C -20 ÷ +50
MAX humidity / altitude 80% / 1000m a.s.l. **
(*) Room temperature 20°C. (**) Please contact the Manufacturer if environmental conditions are different from those prescribed.

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4 INSTALLATION
4.1 RECEIPT AND CONTENT VERIFICATION
Upon receipt of the pump, verify that the packaging is intact. If everything is intact, unpack the contents and check
the pump. If packaging shows signs of damage due to transport or storage conditions, immediately notify the
shipping agent and the manufacturer.
It is always necessary to check that the material received corresponds to its accompanying document.
Packages should be opened taking all precautions to avoid harm to people and the contents thereof.
4.2 PACKAGING
Depending on the size and based on the mode of transport, the pump is packaged in the following ways:
• single box with infill material;
• on wooden pallets with cardboard covers;
• in single boxes positioned on pallets with protective film.
The pallet wood can be reused or recycled in accordance with applicable laws in the country of pump installation.
Other materials such as cardboard, plastic or protective film must be disposed of in accordance with local
regulations.
Do not burn or disperse package components in the environment.
4.3 TRANSPORT AND HANDLING
HAZARD
All transportation, lifting and handling operation must be performed by
qualified and experienced personnel.
The pump can be raised and moved only with forklift trucks or with lifting equipment
(ropes, hooks, etc.) applied to the pump as shown in the figure and adjusted to the
weight of the pump itself, reported in 3.3 "Dimensions and Characteristics" of this
manual and on the identification plate. It is expressly forbidden the manual handling and
transport of the pump.
WARNING
Prepare the pump as detailed in the next chapter and empty the oil tank
(see 6.2.2 "Changing the oil" of this manual) for transport.
4.4 STORAGE
Drain the pump of oil inside and close the intake and outlet with the appropriate protections. The pumps are to be
stored in their packaging and stored in covered, dry, protected places that are not exposed to bright sunlight, with
temperatures in the range indicated in the table of technical specifications.
In case of long periods of stop inside the warehouse or out of production with storage, the location should meet the
specifications described in Chapter 3 (Pump description). In order to keep rubber parts and lip seals efficient and
properly working, we recommend to operate the pump for at least 30 minutes every 6 months with the intake
closed, following the instructions and provisions described in this manual, paying particular attention to those in
Chapter 5 (Use instructions). The non-observance of the provisions could cause the rubber parts to degrade leading
to oil leakages during operation.

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4.5 ENVIRONMENTAL CONDITIONS
Legislative decree 81/08 gives the user the task of classifying the AREAS and then to check under their own
responsibility, that the area where the pump will be installed is consistent with its CATEGORY.
The pump is designed to extract and process fluids, gases or vapours containing ATEX atmospheres from an area
classified as having danger of explosion AREA 2 according to Directive / 2/CE (Title XI Legis. 81/08) and be
installed in environments that are NOT classified ATEX (see 1.7 "Marking" and 3.1.1 "Intended Use" of this
manual).
AREA 2: " lace where it is unlikely that an explosive atmosphere consisting of a mixture of air and flammable
substances in the form of gas, vapour or mist, is present during normal operation but, if it occurs, will persist for only
a short period ".
D.V.P. Vacuum Technology s.p.a. disclaims any liability for the improper installation of the pump in areas other than
those certified.
HAZARD
Any use of the pump to process fluids, gases or vapours containing potentially explosive
atmospheres (ATEX) in areas other than that certified (i.e. zone 1 or 0) is a serious danger to the
health and safety of people.
Any use of the pump to process fluids, gases or vapours in "normal atmospheres" (NON-explosive) does not affect
its operation or the safety of people.
The pump must be installed and used in a covered and adequately lit location. The installation area must meet all
requirements of height, air circulation and meet the requirements imposed by existing legislation.
Temperature, Humidity and altitude
The corresponding limit values are shown in the table of the technical specifications (see 3.3 “Dimensions and
characteristics” of this manual). Please contact the Manufacturer if environmental conditions are different from
those prescribed.
Lighting
All areas must be illuminated evenly and sufficiently to ensure all operations included in this manual and must be
without shadows, reflections, glare or eyestrain.
4.6 PUMP INSTALLATION
HAZARD
efore carrying out any interventions, make sure that the area has been cleared of the possible
presence of potentially explosive atmospheres (ATEX).
To ensure perfect pump operation, house and place it according to the following conditions:
• Allow sufficient space on the perimeter sides of the pump and make sure to keep the motor ventilation side free.
• Make sure the free space adjacent to the pump allows easy access to components for inspection or
maintenance and also allows access for suitable lifting equipment.
• The pump is equipped with mounting points. It is necessary to ensure it locks onto a perfectly horizontal plane in
order to avoid tilting in case of transportation by the system user.
• Some models are already equipped with rubber vibration dampers installed at pump attachment points.
Whenever the model has not been equipped, ensure installation of such equipment so as not to transmit
vibration to the pump.
• Ensure there is ventilation in the room, or inside the machine housing the pump and prevent air coming in from
the cooling fans, which could cause discomfort to personnel.
• Make sure there is no loss of fluid, gas or vapours from the intake and exhaust pipes or fittings of the pump.
HAZARD
Do not install the pump in any area with dust or other materials that could clog or rapidly cover
cooling surfaces.

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4.7 MOTOR INSTALLATION
It is possible to install any type of electric or hydraulic motor that has the features described in the table of technical
data, with flange and shaft corresponding to:
M80/4 - 5 size with flange and shaft with a reduced size of M71 as per standard IEC-72.
WARNING
This pump need motor monophase with high starting torque motor with mechanical
disengager.
WARNING
Install the coupling on the motor by following the following instructions:
• Fit the coupling on the motor shaft until the proper position is reached.
• Tighten screw “A” to firmly fix the coupling to the shaft.
A
4.8 USER SYSTEM
HAZARD
The user must ensure that the fluid, gas or vapour processed by the pump does not produce
unusual chemical reactions (e.g. exothermic chemical reactions) that can lead to the maximum
permitted surface temperature being exceeded or a degradation in the level of protection of the
pump itself.
HAZARD
The user must ensure that the temperature of the flammable liquid, gas or vapour produced by
the pump is higher than the temperature of the same class (T4 = 135°C), shown on the
identification plate.
Make sure that no harmful substances contaminate the user system during installation.
If you wish the system to maintain vacuum even when pump is stopped, install a cutoff valve between
pump and system.
Make sure that no vibrations or stresses are transmitted to the pump connection.
4.9 CONNECTION
HAZARD
Pump connections should be performed by skilled and trained personnel only.
4.9.1 INTAKE AND OUTLET CONNECTIONS
User system connections (both intake and outlet) must be performed with pipes with a diameter equal to or greater
than the pump suction inlet. The weight of pipes or any expansions must not burden the pump.
It is advisable to make the final connection to the pump using flexible pipe or fittings. It is important to tighten all
pipes and couplings. Very long pipes or pipes with a diameter that is too small diminish pump performance.

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HAZARD
Check the connection of the intake and discharge system of the pump to ensure that fluids, gases
or vapours processed do not contaminate the working environment and atmosphere surrounding
the pump.
WARNING
Always install an intake filter, especially if the pump is to work with air that might contain foreign
matters.
Pump outlet gases must be treated in such a way that they do not contaminate the working environment and the
surrounding atmosphere. If condensable vapours are pumped in, the discharge hose should be routed downwards
and have no bends to prevent the condensate produced in the discharge line from building up or flowing back into
the pump.
Never use friction hoses with hose diameters smaller than the intake diameter. Avoid exceeding hose lengths, tight
bends or bends spaced too closely together.
HAZARD
Do not insert outlet fitting pipes or devices that block or impede the disposal of outlet gases (max
overpressure exhaust 0.3 bar).
4.9.2 WIRING
WARNING
Check that network voltage and frequency correspond to values contained on the motor rating
plate.
The connection cable must be adequate for the power absorbed by the pump (absorption values are shown on the
pump motor rating plate) taking into account the environmental conditions of operation.
HAZARD
Always perform earthing of the electric motor and the pump (see 3.3, "Dimensions and
Characteristics" of this manual).
Always install a security system between the pump and the electric power supply. Pump absorption values are
shown on the motor rating plate.
1 Version (standard): The pump comes complete with power cable and start/stop switch. The pump comes
complete with power cable and start/stop switch. The operator should install a plug and connect to an electrical
panel provided with electric protection.
3 and OEM Version: Pump wiring must be connected inside the motor terminal board. See the wiring diagram
inside the terminal board or on motor rating plate. Install an electric protection system.
WARNING
Check that the direction of rotation is correct before starting the pump for the first time or after
changing the electrical connections.
The correct direction of rotation is indicated by the arrow on the pump (see 3.3 “Dimensions and
characteristics” of this manual). Pump operation with a rotation direction that is opposite to that
indicated can severely damage the pump itself.

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5 OPERATING INSTRUCTIONS
5.1 OPERATION
Checks to be performed before start-up:
• The pump is supplied without any oil in it. Use the supplied oil or, alternatively, an alternative lubricant of another
brand but with similar characteristics;
• Make sure the intake and discharge of the pump are properly connected to the system and that, especially the
exhaust, is not obstructed by fittings or valves.
HAZARD
Use a lubricating oil that has a flash point above 135°C (T4), in order to avoid that this could create
an explosive atmosphere (ATEX).
Lube-free operation causes serious damage to the pump and the potential degradation of the level
of protection of the pump from the danger of explosion.
WARNING
A higher quantity of oil than necessary may cause clogging of the oil separators (if installed) and
damage to the pump or the electric motor.
5.1.1 FILLING THE OIL TANK
HAZARD
efore carrying out the operations listed below, isolate the pump from the operating system by
means of an isolation valve (required in 4.8 "System User" of this manual) and from the power
supply, then clean the surrounding area from the possible presence of a potentially explosive
atmosphere (ATEX) due to the opening of the oil filler cap.
WARNING
When filling the oil tank never exceed allowed maximum level.
• Undo the oil filler plug;
• Pour oil in the tank up to mid-range of the oil sight glass;
• Close the filler plug;
• Remove all oil spills from the pump and/or floor.
5.1.2 START-UP
HAZARD
The pump may reach high temperatures when operating.
1 Version: Operate the switch on the terminal board.
3 and OEM Version: Operate the start control on the user system.
After start-up, the pump may run slower than the regular rpm if room temperature is lower than allowed as seen on
the technical data table. It may also run lower if the oil is contaminated or the supply voltage is lower than the
required voltage as indicated on the motor rating plate.
If nominal rpm is not reached within a few seconds, the thermal switch fitted to protect the pump must trip
(installation required in 4. .2 "Wiring" of this manual).
WARNING
If water vapour should be taken in, take the pump to a steady temperature by leaving it to run for
approximately 30 minutes with the suction inlet closed and the system containing the water
vapour isolated before starting the work cycle.
WARNING
Make sure the pump is working at the allowed pressure value and do not leave the pump running
for a long time (>10min) with the suction inlet completely open.
WARNING
It is advisable not to start the pump more than 12 times per hour to avoid excessive energy
consumption and damage to the pump.

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HAZARD
Full r.pm. pump operation must be without vibration or unusual noise. If these are present, stop
the pump immediately, search for the cause and eliminate it.
5.1.3 OIL CLEANING
When oil looks dark or cloudy or when oil level rises, this means that oil contains foreign matters.
For the pumps equipped with gas ballast must follow this procedure:
• Close the system cutoff valve. The pump must operate with the intake completely closed;
• Unscrew the ballast valve no.5 of 2 turns;
• Let pump run under these conditions for at least 1 hour;
• If oil appearance is not back to normal (light colour and no signs of emulsifying), change oil.
5.1.4 STOP
The pump must be stopped by cutting off the power supply.
If the pump is to be powered off, decontaminate the oil and let it run with closed intake for about 30 minutes.
This procedure prevents the pump from being damaged during following start ups, allows to eliminate any moisture
inside the intake chamber and to avoid the oxidation of the rotor.
In the case of long machine downtime, completely drain the oil from the pump to avoid hazards of frost during cold
weather or corrosion due to possible chemical alteration of the stagnant liquid in the pump.

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6 MAINTENANCE
6.1 GENERAL WARNINGS
For good maintenance:
• Immediately verify the causes of any malfunctions (excessive noise, overheating, etc.);
• Pay particular attention to safety devices;
• Make use of all documentation provided by the manufacturer (instruction manuals, wiring diagrams, etc.);
• Use only appropriate tools and original spare parts.
In the event of a failure to understand the information or procedures contained in this chapter, contact D.V.P.
Vacuum Technology s.p.a. for clarification before proceeding.
Only trained or authorised personnel have the necessary expertise to perform tasks with the
technique appropriate for intervention. In particular, the personnel must have the necessary
expertise relating to ATEX classified systems.
HAZARD
Do not perform any type of operation, modification and/or repair of any kind, except for those
listed in this manual.
HAZARD
All maintenance operations must be carried out with the pump disconnected from any power
sources. Do not operate the pump until it has reached a temperature that is not dangerous for
the operator.
HAZARD
If pump maintenance has been performed in a manner inconsistent with instructions, with
non-original spare parts or otherwise so as to impair its integrity or modify its characteristics,
D.V.P. Vacuum Technology s.p.a. will be released from any liability relating to the safety of
persons and malfunction of the pump.
6.2 MAINTENANCE TA LE
The following table shows all required periodic operations to maintain pump efficiency.
OPERATION TYPE FREQUENCY OPERATOR
QUALIFICATION
Check the oil level and pump noise
24 h
Change oil
500 h
Check and clean gas ballast
1000 h
Clean motor fan guard and clean pump
1000 h
Change vanes
10000 h
Shorter maintenance intervals may be required according to operating conditions (high temperature of intake gases,
intake gases containing condensable vapours, etc.).
6.2.1 CHECK OIL LEVEL
Check that oil level is at mid-range of the oil sight glass. If not, see instructions in the following paragraph.
Check oil conditions. When dark, cloudy or emulsified, oil has been contaminated by intake substances. If the
condition does not change even after having carried out the decontamination procedure (see point 5.1.3 “Oil
cleaning” in this manual), replace the oil following the instructions given in point 6.2.2 “Change oil” in this manual.
Check that no odd noises are caused during the normal functioning of the pump; otherwise find and eliminate the
cause. For any questions please contact D.V.P. Vacuum Technology s.p.a. customer service.

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6.2.2 CHANGE OIL
HAZARD
efore carrying out the operations listed below, isolate the pump from the operating system by
means of an isolation valve (required in 4.8 "System User" of this manual) and from the power
supply, then clean the surrounding area from the possible presence of a potentially explosive
atmosphere (ATEX) due to the opening of the oil filler cap.
Change oil as follows:
• let the pump run with closed suction intake for about 10 minutes first so oil will become thinner;
• stop the pump and disconnect it from the mains;
• undo the oil filler plug;
• get a container large enough to hold all oil (see 3.3 “Dimensions and characteristics” of this manual) and open
the oil drain plug;
• drain out all oil;
• close drain plug and fill in fresh oil through the filler plug up to mid-range on the oil sight glass;
• close the oil filler plug;
• Remove all oil spills from the pump and/or floor;
• connect to mains again and verify correct rotation direction of the pump (see 4. .2 “Wiring” of this manual);
• let the pump run with closed intake for a few minutes and then, if necessary, top up oil if necessary.
HAZARD
Wear appropriate personal protection equipment to perform said operations.
HAZARD
Comply with local regulations regarding the collection and disposal of used or polluted oil.
6.2.3 CHECK AND CLEAN GAS ALLAST
HAZARD
efore carrying out the operations listed below, isolate the pump from the operating system by
means of an isolation valve (required in 4.8 "System User" of this manual) and from the power
supply, then clean the surrounding area from the possible presence of a potentially explosive
atmosphere (ATEX) due to the opening of the ballast.
Fully unscrew gas ballast and clean it thoroughly with compressed air. Change gasket if damaged.
6.2.4 CLEAN MOTOR FAN GUARD AND CLEAN THE PUMP
HAZARD
The cleaning of the fan motor and pump protection devices is needed to remove dust deposits
that might otherwise clog or cover rapidly the cooling surfaces, thus causing the
deterioration of the safety level of the pump
This can be done using compressed air and a dry cloth.
Do not use fluids or substances other than those indicated.
HAZARD
Wear appropriate personal protection equipment to perform said operations.
6.2.5 CHANGE VANES
HAZARD
efore carrying out the operations listed below, isolate the pump from the operating system by
means of an isolation valve (required in 4.8 "System User" of this manual) and from the power
supply, then clean the surrounding area from the possible presence of a potentially explosive
atmosphere (ATEX) in the pump itself.
HAZARD
During the replacement operation of the palette, check for the presence of traces of rust on
metal parts that could be due to aluminium thermal reactions.
The instructions for replacing vanes are available upon request.

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6.3 SPARE PARTS
Use Original Spare Parts to replace pump parts.
When purchasing spare parts, always quote the serial number and model of the pump (these can be found on the
identification plate) as well as the spare part purchase number.
DESCRIPTION DC.16DEX
Kit minor K 602028
Kit major K 602028/1
Olio 1 dm³ 8833100 (SW100)
Olio 5 dm³ 8833500 (SW100)
Gas ballast gasket
1001018
D.V.P. Vacuum Technology s.p.a. disclaims all responsibility for any deterioration of pump performance or for
damages caused due to use of non-original spare parts.
HAZARD
The use of non-original spare parts can degrade the level of protection of the pump and render
the ATEX certification null and void.

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7 HOW TO RETURN THE PUMP
The product may only be returned after prior agreement with the supplier, who will provide the authorisation number
that must accompany the material delivered and should be duly complete in its entirety.

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8 DISMANTLING
HAZARD
efore carrying out the disposal operations of the pump it is necessary to clear out any
potentially explosive atmospheres (ATEX) contained within it.
Demolition of the pump must be performed by authorised technicians.
Metal parts can be disposed of as scrap metal.
All materials deriving from demolition must be disposed of according to regulations in the country where the pump
will be demolished.
HAZARD
Disposal operations involve risks of cutting, shavings protection, entanglement, contact with
moving parts and contact with chemicals. Operators should use the appropriate personal
protective equipment.