Oerlikon TRIVAC NT 5 User manual

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TRIVAC NT 5 / NT 10
Rotary Vane Vacuum Pumps
Operating Instructions 17200918_002_A1

Table of contents
217200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Page
Important Safety Information 3
1 Description 6
1.1 Principle of Operation 7
1.2 Supplied Equipment 9
1.2.1 Notes on the Oil and How to Order 9
1.3 Technical Data 10
1.3.1 Motor Dependent Data 11
1.4 Ordering Information 13
1.5 Accessories 13
2 Transporting and Storing 14
3 Installation 15
3.1 Placement 15
3.2 Conforming Utilisation 15
3.3 Connection to the System 15
3.4 Electrical Connections 17
3.4.1 Pumps with AC motor 17
3.4.2 Pumps with Three-Phase Motor 18
4 Operation 19
4.1 Media Compatibility 19
4.2 Start-up 19
4.3 Operation 20
4.3.1 Pumping of Non-Condensable Gases and Vapours 20
4.3.2 Pumping of Condensable Gases and Vapours 20
4.3.3 Operating Temperature 20
4.4 Shutting Down/Shelving 21
5 Maintenance 22
5.1 Service at Oerlikon Leybold Vacuum 22
5.2 Maintenance Schedule (recommendation) 23
5.3 Checking the Oil Level 24
5.4 Oil Change 25
5.5 Cleaning the Inlet Screen 26
5.6 Disassembly and Assembly of the Internal Demister 27
5.7 Disassembly and Assembly of the Electric Motor 27
6 Troubleshooting 29
7 Wearing and Original Parts 31
8 Waste Disposal 31
EC Declaration of Conformity 32

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Important Safety Information
Indicates procedures that must be strictly observed to prevent hazards to
persons.
Indicates procedures that must strictly be observed to prevent damage to, or
destruction of the equipment.
The TRIVAC NT 5/10 pumps from Oerlikon Leybold Vacuum have been
designed for safe and efficient operation when used properly and in
accordance with this manual. It is the responsibility of the user to carefully
read and strictly observe all safety precautions described in this chapter
and throughout the manual. This product must be ooppeerraatteeddaannddmmaaiinnttaaii--
nneeddbbyyttrraaiinneeddppeerrssoonnnneelloonnllyyiinntthheepprrooppeerrccoonnddiittiioonnaannddaassddeessccrriibbe
eddiinn
tthheesseeOOppeerraattiinnggIInnssttrruuccttiioonnss. Consult local, state, and national agencies
regarding specific requirements and regulations. Address any further
safety, operation and/or maintenance questions to your nearest Leybold
Oerlikon Vacuum office.
Failure to observe the following precautions could result in serious per-
sonal injury:
■Before beginning with any maintenance or service work on the TRIVAC
NT, disconnect the pump from all power supplies (lockout/tagout).
■Do not operate the pump with any of the covers removed. Serious injury
may result.
■If exhaust gases must be collected or contained, do not allow the exhaust
line to become pressurised.
■Make sure that the gas flow from the exhaust port is not blocked or
restricted in any way.
■The standard version of the TRIVAC NT is not suited for operation in
explosion hazard areas.
■Before starting up for the first time, the motor circuit must be equipped
with a suitable protective motor switch. Please take note of the informati-
on in these Operating Instructions and on the electric motor (wiring dia-
gram).
■The TRIVAC NT pumps including the accessories are fundamentally not
suited for pumping of combustible and explosive gases or vapours.
Mixtures of substances may, regarding the fire and explosion risk be criti-
cal or uncritical. The operating company is under the commitment to ana-
lyse this and rate the hazard potential accordingly so as to therefrom deri-
ve the necessary safety measures which must be introduced.
■When pumping toxic, chemical, radioactive and corrosive gases as well as
pyrophorous substances, the operating company is under the obligation
to comply with the national and international safety regulations and guide-
lines. Regarding the suitability of the TRIVAC NT pumps for special appli-
cations in which such gases, respectively substances shall be pumped,
Oerlikon Leybold Vacuum should be consulted first.
Safety information
Warning
Caution
Warning

■Avoid exposing any part of the human body to the vacuum.
■Never operate the TRIVAC NT without a connected intake line or without
fitting a blank flange.
■The location at which the TRIVAC NT (including its accessories) is opera-
ted should be such that angles over 10° from the vertical are avoided.
■The location of the TRIVAC NT should be such that all controls are easily
accessible.
■Under certain ambient conditions the TRIVAC NT may attain a temperatu-
re of over 70 °C (158 °F). There then exists the danger of receiving burns.
Note the symbols on the pump pointing to the hazards, and in the case of
a hot pump wear the required protective clothing.
■All work on the pumps “at operating state temperature“ shall only be done
while wearing protective gloves. Always let the pump cool down before
any servicing and maintenance work.
■The noise level produced by the TRIVAC NT is 49 dB(A) max.
Suitable hearing protection measures must be introduced.
■Before pumping oxygen (or other highly reactive gases) at concentrations
exceeding the concentration in the atmosphere (> 21 % for oxygen) it will
be necessary to use a special pump. Such a pump will have to be modi-
fied and de-greased, and an inert special lubricant (like PFPE) must be
used.
■Before operating the TRIVAC NT check first compatibility with the pumped
media so as to avoid hazardous conditions during operation right from the
start. Observe all applicable safety standards and regulations.
■After a mains power failure the pump will run up automatically again. This
also applies in the case of an emergency shutdown. In order to prevent
the pump from running up automatically again, the pump must be integra-
ted within a control arrangement such that it can only be switched on
manually again after the mains power has returned.
■When operating the pumps at gas throughput, it is urgently recommen-
ded to connect an exhaust filter or use a suitable exhaust line. Here, the
exhaust line must slope down and away from the pump.
■When moving the TRIVAC NT always use the allowed means. A lifting eye
is provided as standard on the pump.
■The pump when filled with oil must only be moved in its vertical position.
Spilled oil involves the risk of falling.
Safety information
417200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Warning

Failure to observe the following precautions could result in damage to
the pump.
■Do not allow the ingestion of small objects (screws, nuts, washers, pieces
of wire, etc.) through the inlet port. Always use the inlet screen which is
supplied with every pump.
■Do nnoottuse the pump for applications that produce abrasive or adhesive
powders or condensable vapours that can leave adhesive or high viscosi-
ty deposits. Please contact our Sales or Service offices to select a suita-
ble separator. Also please contact Leybold Sales or Service when plan-
ning to pump vapours other than water vapour.
■This pump is suited for pumping water vapour within the specified water
vapour tolerance limits.
■Avoid vapours that can condense into liquids upon compression inside
the pump, if these substances exceed the vapour tolerance of the pump.
■Before pumping vapours, the TRIVAC NT should have attained its opera-
ting temperature. The pump will have attained its operating temperature
about 30 minutes after starting the pump. During this time the pump
should be separated from the process, by a valve in the intake line, for
example.
■In the case of wet processes we recommend the installation of liquid
separators upstream and downstream of the pump as well as the use of
the gas ballast.
■The exhaust line should be laid so that it slopes down and away from the
pump so as to prevent condensate from backstreaming into the pump.
■The entry of particles and fluids must be avoided under all circumstances.
■Reactive or aggressive substances in the pump chamber may impair the
operating oil or modify it. In addition, such substances may be incompa-
tible with the materials of the pump (Viton, grey cast iron, aluminium,
steel, resins, glass etc.).
■Corrosion, deposits and cracking of oil within the pump are not allowed.
■Normal amounts of humidity within the range of the pump’s vapour tole-
rance will not significantly affect pump performance (when the gas ballast
is active).
■In the case of custom pumps (with part numbers deviating from those
stated in the EC Declaration of Conformity) please note the information
provided in the supplementary sheets.
We reserve the right to modify the design and the specified data. The illustra-
tions are not binding.
Safety information
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Caution

Description
617200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
1 Description
The TRIVAC NT are dual stage oil sealed rotary vane vacuum pumps.
The number in the designation of the pump indicates the pumping speed of
this pump in m3· h-1.
These pumps are capable of pumping gases and vapours out of vessels and
vacuum systems down into the medium vacuum pressure range. The stan-
dard pumps are not designed to handle oxygen at concentrations exceeding
the concentration of oxygen in the atmosphere. Moreover, these pumps are
not suited for pumping of hazardous gases or extremely aggressive or corro-
sive media. If in doubt please consult Oerlikon Leybold Vacuum.
The drive motor of the TRIVAC NT is screwed directly to the bearing piece.
The shaft of the pump and the shaft of the motor are linked by a coupling
piece. The bearings in the inner pump body are force-lubricated sliding bea-
rings.
The oil sight glass for viewing the minimum/maximum oil level and the oil
drain as well as the name plate are located on the front of the pump.
The connection components, the gas ballast knob and the oil fill are located
on the top of the pump.
Fig. 1 TRIVAC of the NT series
1 Intake port
2 Oil drain
3 Oil sight glass
4 Oil fill
5 Exhaust port
6 Gas ballast valve
7 Mains power connection
1
2
7
3
4
5
6

1.1 Principle of Operation
The rotor (2/6) which is eccentrically arranged in the pump housing (pump
chamber) has two radially sliding vanes (2/7 and 2/9) which divide the pump
chamber of the pump into several chambers.
The volume of each chamber changes periodically with each turn of the rotor
so that the gas at the intake port (2/4) is sucked in. The gas enters the pump
chamber, and after the admission aperture has been sealed off by the vane,
the gas is compressed and moved on.
The compressed gas is ejected from the pump chamber through the exhaust
valve. Oil which is entrained in the gas is roughly separated by an internal
demister and at the same time any mechanical contaminations are also
removed from the oil. The gas exits the pump through the exhaust port.
Oil injected into the pump chamber serves the purpose of sealing and lubri-
cation. The knocking noise (oil slap) which normally occurs when the pump
approaches its ultimate pressure is avoided by injecting a small amount of air
into the oil so that a silencing effect is attained.
Description
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B
G
0
1
2
3
Fig. 2 Operating principle of a TRIVAC NT 5 (other TRIVAC NT types operate in a similar way)
1 Gas ballast valve
2 Gas ballast inlet
3 Tandem valve (vacuum protection)
4 Intake port
5 Oil feed (oil pump)
6 Rotor
7 Vane (HV)
8 High vacuum stage (pump chamber)
9 Vane (FV)
10 Forevacuum stage (pump chamber)
11 Non-return valve
12 Diaphragm valve
13 Exhaust valve
14 Exhaust port
2
4
5
6
8
7
3
9
10
11
12
13
14
1

By opening the gas ballast valve (2/1) it is possible to admit a controlled
quantity of air (gas ballast) into the pump chamber while the compression
process is in progress. The gas ballast will prevent the condensation of
vapours within the pump up to the extent of the vapour tolerance levels as
stated in the specifications for the pump (these data refer to water vapour).
A special lubrication system with forced lubrication of the sliding bearings has
been developed to enable operation of the pump at intake pressures up to
1000 mbar.
An oil pump supplies the oil from the oil reservoir into a high pressure oil
system which in turn supplies all bearings. From here the oil enters the pump
chamber of the vacuum pump.
The oil pump is located in bearing piece of the high vacuum stage.
Separation of oil and gas in the pump involves two stages. First an internal
demister which is arranged ahead of the exhaust valve ensures the creation
of larger droplets.
Next these are returned back to the oil reservoir via a separation panel. This
ensures a minimal loss of oil.
This and the combination with the large usable oil reservoir, results in long
intervals between the oil exchanges, even at high intake pressures.
The gas ballast valve (GB) is opened or closed by turning it (positions 0, 1, 2, 3).
Description
817200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Fig. 3 Diagram for the lubrication system
1 Accessory
2 Bearing
3 Non-return valve
4 Pump chamber of the TRIVAC
5 Oil reservoir
6 Oil pump

GB position Explanation
0No gas ballast, maximum ultimate pressure
1For cleaning the pump’s oil at a good
ultimate pressure and low oil consumption
2Good water vapour tolerance
without producing excessive noise
3Maximum water vapour tolerance in
accordance with the technical data (Chapter. 1.3)
When the pump is at standstill (mains power failure, or when the pump is
shut down) the pump chamber is hermetically sealed off by two safety valves
(tandem valve and gas ballast diaphragm valve) which are controlled through
the oil pressure.
This reliably avoids any inadvertent venting of the vacuum chamber and the
backstreaming of oil.
1.2 Supplied Equipment
The TRIVAC NT is supplied with the following basic equipment:
• Pump with motor
• Separately included oil filling (see Chapter 1.2.1)
• Separately included inlet screen with O-ring
• Operating Instructions
The connection ports are provided with foil protectors for protection during
shipping.
The TRIVAC NT pumps having an AC motor are supplied ready for operation,
complete with switch, built-in thermal motor overload protection, mains cord
(1.8 m long) and a mains plug which depends on the country of use.
Exempt from this is the dual voltage motor for 110 V-120 V; 208 V-240 V.
The mains cord for this voltage range must be ordered separately, see
Accessories, Chapter 1.5.
The three-phase models do not come with the accessories needed for the
electrical connection. However, these accessories are available upon request.
1.2.1 Notes on the Oil and How to Order
Mineral oil is used as standard. If any other kind of special oil is being used,
this fact will be indicated by a sticker on the oil box stating the type of special
oil used.
Not all types of oil have been released for all pumps. You must only use
the kind of oil which has been specified for the particular pump.
Description
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Caution
Settings at the
gas ballast valve
Note

1.3 Technical Data TRIVAC NT 5 TRIVAC NT 10
Nominal pumping speed* 50/60 Hz m3· h-1 6/7.3 12/14.6
Pumping speed 50/60 Hz m3· h-1 5.2/6 9.9/11,3
Ult. partial pressure without gas ballast mbar 5 · 10-4 5 · 10-4
Ult. total pressure without gas ballast** mbar 2 · 10-3 2 · 10-3
Ult. total pressure w. gas ballast (stage 2)** mbar 3 · 10-2 3 · 10-2
Water vapour tolerance
Stage 1 mbar 10 10
Stage 2 mbar 30 20
Stage 3 mbar 40 30
Water vapour capacity g · h-1 150 210
(max. at stage 3)
Oil filling, min./max. l 0.75 / 1.25 0.75 / 1.25
Noise level * acc. to DIN 45 635, dB (A) 49 49
(without gas ballast)
Permissible ambient temperature °C 12 - 50 (EURO motor) / 12 - 40 (USA/Japan motor)
Motor power 50/60 Hz W 450/550 450/550
Speed 50/60 Hz min-1 1350/1650 1350/1650
Motor protection IP 54 54
Weight with operating agent ** kg 22.1 24.2
Connections, intake and exhaust DN 25 KF 25 KF
Dimensions mm see Figure 4 see Figure 4
* acc. to DIN 28 426 T1, ** acc. to DIN 28 400 ff, with 3-ph. motor
Description
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Only provided the lubricants recommended by us will we guarantee that
the pump will attain its specified technical data.
Caution