LEYBOLD TRIVAC S 16 B User manual

TRIVAC®B
Rotary Vane Vacuum Pump
S/D 16, 25 B
Cat.-No.
102 65/66/75/76
103 25/26/27/28/31/32/35/36/37/38/48/49
112 65/66/75/76
113 25/26/27/28/29/31/32
113 35/36/37/38/39/48/49
113 33
Operating Instructions
Vacuum Pumps Instrumentation Fittings and Valves LEYBOLD VACUUM
GA 01.202/9.02

GA 01.202/9.02 - 03/96
Contents
2
Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 Supplied Equipment . . . . . . . . . . . . . . . . . . . .5
1.3 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.4 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.5 Transportation . . . . . . . . . . . . . . . . . . . . . . . .6
1.6 Technical Data . . . . . . . . . . . . . . . . . . . . . . . .7
2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.2 Connection to the System . . . . . . . . . . . . . . . .9
2.3 Electrical Connection . . . . . . . . . . . . . . . . . .10
2.4 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.6 Switching off / Shutdown . . . . . . . . . . . . . . . .14
3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . .15
3.1 Checking the Oil Level . . . . . . . . . . . . . . . . .15
3.2 Oil Change . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.3 Cleaning the Dirt Trap . . . . . . . . . . . . . . . . . .17
3.4 Removing and Fitting the Internal Demister . .17
3.5 Disassembly and Reassembly of the Electric . .
Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.6 Replacing the Outer Shaft Seal . . . . . . . . . . .19
3.7 Removing and Remounting the Pump Module20
3.8 Service at Leybold’s . . . . . . . . . . . . . . . . . . .20
3.9 Storing the Pump . . . . . . . . . . . . . . . . . . . . .21
3.10 Maintenance Plan . . . . . . . . . . . . . . . . . . . . .22
4 Troubleshooting . . . . . . . . . . . . . . . . . . . . .24
EC Declaration of Conformity . . . . . . . . . .26
Indicates procedures that must be strictly
observed to prevent hazards to persons.
Indicates procedures that must strictly be
observed to prevent damage to, or destruc-
tion of the equipment.
Figures
The references to figures, e.g. (1/2) consist of the Fig.
No. and the Item No. in that order.
Leybold-Service
If a pump is returned to Leybold, indicate whether the
pump is free of substances damaging to health or
whether it is contaminated.
If it is contaminated also indicate the nature of the
hazard. Leybold must return any pumps without a
„Declaration of Contamination“ to the sender’s address.
Disposal of waste oil
Under the amended law relating to waste disposal dated
November 1, 1986 (valid in the Federal Republic of Ger-
many) the disposal of used oil is subject to new provi-
sions. According to legislation relating to waste disposal
the so-called principle of causality is applied. Hence,
anyone in possession of used oil is responsible for its
proper disposal.
Used oils coming from vacuum pumps must not be
mixed with other substances.
Used oils from vacuum pumps (LH-oils on the basis of
mineral oils) having been affected by normal contamina-
tion due to oxygen from the ambient air, increases in
temperature and mechanical wear, must be disposed of
as used oil in accordance with the regulations.
Used oils from vacuum pumps that have been contami-
nated by other substances must be labelled, stored and
disposed of as special waste with reference to the kind
of contamination.
When disposing of used oil please observe the safety
regulations that are valid in your country.
In many countries proof of were the oil has finally been
left is required by Law and often shipping of such conta-
minated waste requires permission by the authorities.
Waste disposal information is available through:
Bundesamt für Gewerbliche Wirtschaft (BAW)
Frankfurter Str. 29-31
D-65760 Eschborn/Taunus
Phone: [phone] - Telex: 415603/04
We reserve the right to modify the design and the speci-
fied data. The illustrations are not binding.
Warning
Caution

GA 01.202/9.02 - 03/96
123
Description
3
1 Description
TRIVAC-B pumps are oil-sealed rotary vane pumps. The
TRIVAC S16 B and S 25 B are single-stage pumps, and
the TRIVAC D16 B and D 25 B are dual-stage pumps.
The number in the type designation (16 or 25) indicates
the pumping speed in m3· h-1.
TRIVAC-B pumps can pump gases and vapours and
evacuate vessels or vacuum systems in the fine vacuum
range. Those of standard design are not suitable for
pumping greater than atmospheric concentrations of
oxygen, hazardous gases, or extremely aggressive or
corrosive media.
The drive motor of the TRIVAC-B is directly flanged to
the pump at the coupling housing. The pump and motor
shafts are directly connected by a flexible coupling. The
bearing points of the pump module are force lubricated
sliding bearings. All controls as well as the oil-level glass
and the nameplate are arranged on the front.All connec-
tions are to be found at the sides of the pump. The oil-
level glass is provided with prisms for better observation
of the oil level.
The pump module consists of assembly parts which are
pin-fitted so as to allow easy disassembly and reassem-
bly. The pump module can be easily removed without
special tools.
1.1 Function
The rotor (2/7), mounted eccentrically in the pump hou-
sing (2/6), has two radially sliding vanes (2/5) which divi-
de the pump chamber into several compartments. The
volume of each compartment changes periodically with
the rotation of the rotor.
As a result, gas is sucked in at the intake port (2/1). The
gas passes through the dirt trap sieve (2/2), flows past
the open anti-suckback valve (2/3) and then enters the
pump chamber (2/6). In the pump chamber, the gas is
passed on and compressed, after the inlet aperture is
closed by the vane.
The oil injected into the pump chamber is used for sea-
ling and lubricating. The slap noise of the oil in the pump
which usually occurs when attaining the ultimate pressu-
re is prevented by admitting a very small amount of air
into the pump chamber.
The compressed gas in the pump chamber is ejected
through the exhaust valve (2/10). The oil entrained in the
gas is coarsely trapped in the internal demister (2/11);
there the oil is also freed of mechanical impurities. The
gas leaves the TRIVAC-B through the exhaust port.
During compression, a controlled amount of air - the so-
called gas ballast - can be allowed to enter the pump
chamber by opening the gas ballast valve. The gas bal-
last stops condensation of vapours in the pump chamber
up to the limit of water vapour tolerance as specified in
the technical data for the pump.
Key to Fig. 1
1 Oil filter OF 4-25
2 Exhaust filter AF 16-25
3 Condensate trap AK 16-25
Fig. 1 TRIVAC-B with accessories

GA 01.202/9.02 - 03/96
The gas ballast valve is opened and closed by turning
the gas ballast knob (7/5) on the front.
To enable the TRIVAC-B to be used at intake pressures
as high as 1,000 mbar, a special lubricating system was
developed featuring force-lubrication of the sliding bea-
rings.
An oil pump (3/6) pumps the oil from the oil reservoir
(3/5) into a pressure-lubrication system which supplies
oil to all bearing points (3/2). From there the oil enters
the pump chamber area (2/6) of the vacuum pump.
The oil pump is fitted in the front end plate on the cou-
pling side of the pump module. The oil suction line is pla-
ced low, resulting in a large usable oil reservoir.
The oil is separated from the gas in the TRIVAC-B in two
steps as described above. First, small droplets are
coalesced into large drops in the internal demister (2/11)
fitted above the exhaust valve (2/10). Then, the large
drops fall into the oil reservoir as the exhaust gas is
diverted by the inner walls of the oil case. Thus a low
loss of oil is obtained. This and the large usable oil reser-
voir ensure long intervals between oil changes even at
high intake pressures.
The vacuum is maintained by the TRIVAC-B by an inte-
grated hydropneumatic anti-suckback valve (2/3) which
is controlled via the oil pressure.
Description
During operation of the TRIVAC-B the control piston
(4/3) remains sealed against a spring (4/2) by the oil
pressure. The valve disc (4/6) of the anti-suckback valve
is held at the lower position by its own weight (valve
open). When the pump stops (because it has been swit-
ched off or because of a failure), the oil pressure drops
and the spring (4/2) presses the control piston (4/3) up.
Thus a connection is provided between the oil case or
the oil reservoir (4/1) and the piston (4/4) of the anti-
suckback valve. Due to the pressure difference between
the oil case and the intake port the oil presses the piston
(4/4) up and the valve plate (4/6) against the valve seat
(4/5). The quantity of oil in the oil reservoir (4/1) prevents
the entry of air into the intake port (2/1) at the beginning
of this process.
After the oil has flowed out from the reservoir and when
the valve plate rests on the valve seat, air follows in,
which vents the pump chamber and forces the valve disc
(4/6) against its seat. This effectively prevents backstre-
aming of oil. The anti-suckback valve (2/3) operates
independently of the operating mode of the pump, i.e.
also with gas ballast.
4
Fig. 2 Sectional drawing of the TRIVAC-B
Key to Fig. 2
1 Intake port
2 Dirt trap
3 Anti-suckback valve
4 Intake channel
5 Vanes
6 Pump chamber
7 Rotor
8 Cover plate, connection for inert gas ballast
9 Exhaust channel
10 Exhaust valve
11 Internal demister
12 Spring buckles
13 Cover plate, connection for oil filter

GA 01.202/9.02 - 03/96
Description
1.2 Supplied Equipment
The equipment supplied with the TRIVAC-B pump inclu-
des:
Pump with motor, including initial filling of N 62 or
HE-200 oil, or Artic oil (Cat. Nos. 113 29 and 113 39),
or Anderol RCFE 96 N (Cat. Nos. 113 33).
1 centering ring,
1 centering ring with dirt trap,
2 clamping rings DN 25 KF.
As protection during shipment, the connection ports are
each blanked off by rubber diaphragms and supporting
rings.
5
TRIVAC-B pumps with single-phase AC motor are sup-
plied ready to operate with switch, built-in thermal motor
protection switch, mains cable (2 m) and mains plug.
For TRIVAC-B pumps with three-phase AC motor, the
switch, motor protection switch, mains cable etc. are not
included.
Fig. 3 Schematic of the lubricating system
Fig. 4 Hydropneumatic anti-suckback valve
Key to Fig. 3
1 Accessories
2 Bearings
3 Non-return valve
4 Pump chamber of the TRIVAC
5 Oil reservoir
6 Oil pump
Key to Fig. 4
1 Oil reservoir 5 Valve seat
2 Spring 6 Valve disk
3 Control piston 7 Gas inlet
4 Anti-suckback piston

Description
1.3 Accessories
Cat. No. / Ref. No.
Condensate trap AK16-25, DN 25 KF 188 11
Exhaust filter AF16-25, DN 25 KF 189 11
Drain tap for condensate trap, exhaust filter,
oil drain of the pump,
vacuum-tight 188 91
oil tight 188 90
Exhaust filter with lubricant return
AR 16-25, DN 25 KF 189 21
Exhaust filter with Iubricant return ARS 16-25 189 56
Dust filter 186 10
Dust separator 186 11
Molecular filter 186 12
Fine vacuum adsorption trap (with zeolite) 187 10
Adsorption trap
(with aluminium oxide) 854 15
(with cryo insert) 854 18
Oil filter OF 4-25 101 91
Chemical filter CF 4-25 101 96
Chemical filter with safety cut-off valve CFS 101 76
Adapter for gas ballast port
M 16 x 1.5 - DN 16 KF 168 40
M 16 x 1.5 - 3/8 inch NPT 99 175 011
Oil N 62 1l 177 01
5l 177 02
20 l 177 03
Arctic oil SHC 244 1 l 200 28 229
(order from Leybold Cologne, Germany)
Anderol RCFE 96 N 1 l 200 39 839
Oil HE-200 1 qt 98 198 006
(order from 12 qt case 98 198 049
LHVP, Export Pa., 1 gal 98 198 007
USA) 5 gal 98 198 008
The oil grades N 62 and HE-200 are interchangeable.
Special oils upon request.
Only use the kind of oil specified by Ley-
bold. Alternative types of oil are specified
upon request.
1.4 Spare Parts
Set of gaskets 197 21
Pump module, complete S 16 B 200 10 955
D 16 B 200 10 956
S 25 B 200 10 959
D 25 B 200 10 960
Module-gasket 200 10 736*)
Oil case gasket 200 10 737*)
Internal demister S/D 16 B 390 26 012*)
S/D 25 B 390 26 013*)
*) included in gasket set
1.5 Transportation
• Pumps which are filled with operating
agents must only be moved while standing
upright. Otherwise oil may escape. Avoid
any other orientations during transport.
• Check the pump for the presence of any
oil leaks, since there exists the danger that
someone may slip on spilt oil.
• When lifting the pump you must make use
of the crane eyes provided on the pump for
this purpose; also use the recommended
type of lifting device.
6GA 01.202/9.02 - 03/96
Caution
Caution
Warning

GA 01.202/9.02 - 03/96
10-1
h
.
m-13
2
4
8
6
100
101
102
2486
10-5 10-4 10-3 10-2 10-1 100101102103
mbar
D25B
D16B
S25B
S16B
Druck/Pressure/Pression
Saugvermögen/Pumping speed/Débit
Description
7
Fig. 5 Pumping speed characteristics of the TRIVAC S 16 B to TRIVAC D 25 B, 50 Hz operation, SI units
m3· h-1
m3· h-1
mbar
mbar
mbar
DN
cm3
IP
S 16 B
18.9
16.5
< 2,5 · 10-2
< 6,5 · 10-1
40
25 KF
550/1000
54
D 16 B
18.9
16.5
< 1 · 10-4
< 5 · 10-3
25
25 KF
450/1000
54
S 25 B
29.5
25.77
< 2,5 · 10-2
< 6,5 · 10-1
40
25 KF
550/1300
54
50 Hz operation, SI units
D 25 B
29.5
25.7
< 1 · 10-4
< 5 · 10-3
25
25 KF
600/1400
54
Nominal pumping speed*
Pumping speed*
Ultimate partial pressure with-
out gas ballast*
Ultimate total pressure with
gas ballast*
Water vapour tolerance*
Connection ports
Oil filling min./max.
Type of protection
* as per DIN 28 400 and following numbers
1) Weight for the version with three-phase motor 218-242/380-420 V, 50 Hz
240-277/415-460 V, 60 HZ
1.6 Technical Data
with gas ballast
without gas ballast
kg 23 26 27 32
Weight1)
We can only guarantee that the pump will
meet its specifications when using the type
of lubricant which has been specified by us.
Caution

GA 01.202/9.02 - 03/96
Description
8
Motor related data
102 65 507 26 112 65 507 29 - - 11, 230 V, 50 Hz 550 W 5 A 1400 48 dB (A) 380 66 003 - - 102 75 511 30 112 75 572 35 11, 230 V, 50 Hz 750 W 6.3 A 1350 50 dB (A) 380 66 004 103 25 510 33 113 25 510 36 103 35 510 33 113 35 572 38 11, 230 V, 60 Hz 750 W 6.2 A 1650 52 dB (A) 200 10 407 103 26 560 30 113 26/291) 560 33 103 36 560 30 113 36/391) 621 35 11, 100 V, 50 Hz / 110 V, 60 Hz 750 W 14 A 1400/1700 53/58 dB (A) 220 10 408 103 31 560 30 113 31 560 33 103 48 560 30 113 48 621 35 11, 115 V, 60 Hz 750 W 12.5 A 1650 58 dB (A) 200 10 679 103 32 560 30 113 32 560 33 103 49 560 30 113 49 621 35 11, 200 V, 50/60 Hz 750 W 6.2/5.8 A 1420/1700 53/58 dB (A) 200 10 419 102 66 482 23 112 66 482 26 - - 31, 230/400, 50 Hz
250/440, 60 Hz 550 W 2.85/1.65 A
2.5/1.45 A 1370
1675 47 dB (A)
51 dB (A) 380 66 001
- - 102 76 507 27 112 76 568 32 31, 230/400, 50 Hz
250/440, 60 Hz 750 W 3.55/2.05 A
3,25/1.85 A 1400
1705 48 dB (A)
52 dB (A) 380 66 002
103 27 507 23 113 27 507 27 103 37 507 28 113 37 568 33 31, 230/400 V, 50 Hz
EExeIIT3 750 W 3.4/1.97 A 1405 48 dB (A) 200 10 409
103 28 2752)16 113 28 2752) 19 103 38 2752) 17 113 38 3362) 22 without motor - - - - -
Cat. No. l (mm) W (kg) Cat. No. l (mm) W (kg) Cat. No. l (mm) W (kg) Cat. No. l (mm) W (kg) Motor-connection voltage, frequency Motor
power Rated
current Speed Motor
noise level Order No. for
the motor
S 16 B D 16 B S 25 B D 25 B
nml
ca
b1
o
h1
h
h2
h3
b2
b
Fig. 6 Dimensional drawing for the TRIVAC rotary vane pumps (Dimensions a, l, b to b2 and h1 are approximate)
abb
1b
2chh
1
h
2
h
3
mno
11, 50 Hz 193 153
S/D 16 B 31, 50 Hz 82 190 175 150 135 298 250 226 263 280 140 132
11/31, 60 Hz 193 150 11, 50 Hz 193 153
S 25 B 31, 50 Hz 82 190 175 150 135 298 250 226 263 280 140 132
11/31, 60 Hz 193 150 11, 50 Hz 193 153
D 25 B 31, 50 Hz 143 190 175 150 135 298 250 226 263 280 140 132
11/31, 60 Hz 193 150
dimensions in mm
The Cat. Nos. 113 29 and 1123 39 are equipped with UI-cable NEMA 5-158 2.5 m

GA 01.202/9.02 - 03/96
Operation
2.1 Installation
The standard pump (except the versions
equipped with an explosion hazard rated
motor) is not suited for installation in explo-
sion hazard areas. Pumps equipped with
EExcIIT3 motors may only be used in type
2 areas. When planning such an application
please contact us first.
The TRIVAC-B pump can be set up on a flat, horizontal
surface. Rubber feet under the coupling housing ensure
that the pump can not slip.
If you wish firmly install the pump in place, insert bolts
through bore holes in the rubber feet.
Max. tilt for the pump (without further
attachment) with possibly fitted standard
accessories is 10°from the vertical.
The rubber feet act as vibration absorbers.
They must therefore not be compressed by
screws. When installing the TRIVAC-B
pump, make sure that the connections and
controls are readily accessible.
The site chosen should allow adequate air
circulation to cool the pump (keep front and
rear unobstructed). The ambient temperatu-
re should not exceed +40 °C (104 °F) and
not drop
below +12 °C (55 °F) (see Section 2.5.3).
The max. amount of heat given off approxi-
mately corresponds to the rated motor
power.
2.2 Connection to the
System
Before connecting the TRIVAC-B, remove the shipping
seals from the connection flanges (7/2) and (7/3).
Retain the shipping seals in case you need
to store the pump in the future.
The pump is shipped with intake and exhaust flanges
mounted for horizontal connection of the connecting
lines. You can easily convert the ports for vertical
connection by removing the four capscrews, rotating the
flanges as required, and reinstalling the capscrews.
Connect the intake and exhaust lines with a centering
ring and a clamping ring each. Use the centering ring
with dirt trap for the intake port.
Connect the intake and exhaust line using anti-vibration
bellows, without placing any strain on the pump.
The intake line must be clean. Deposits in the intake line
may outgas and adversely affect the vacuum. The
connecting flanges must be clean and undamaged.
9
2 Operation
Abb. 7 Connections and controls
Key to Fig. 7
1 Handle
2 Intake port
3 Exhaust port
4 Oil-level glass
5 Gas ballast knob
6 Threaded connection M 16 x 1.5 for inert gas ballast
7 Adapter
8 Cover plate
9 Cover plate; connection for oil filter
Caution
Caution
Warning

Operation
The maximum throughput of the pump is equivalent to
the pumping speed of the pump (see Section 1.6).
The cross-section of the intake and exhaust
lines should be at least the same size as
the connection ports of the pump. If the
intake line is too narrow, it reduces the
pumping speed. If the exhaust line is too
narrow, overpressures may occur in the
pump; this might damage the shaft seals
and cause oil leaks. The maximum pressu-
re in the oil case must not exceed 1.5 bar
(absolute).
When pumping vapours, it is advisable to
install condensate traps on the intake and
exhaust sides.
Install the exhaust line with a downward
slope (lower than the pump) so as to pre-
vent condensate from flowing back into the
pump. If this is not possible, insert a con-
densate trap.
The exhaust gases from the vacuum pump
must be safely led away and subjected to
post-treatment as required. In order to redu-
ce the emission of oil vapours we recom-
mend the installation of an additional
exhaust filter (Leybold accessory).
Depending on the type of application or the
kind of pumped media, the corresponding
regulations and information sheets must be
observed.
The pumps may be operated with an inert gas ballast via
a connection which is provided for this purpose. The
cover plate (7/8) can be removed to gain access to this
M 16 x 1.5 threaded port (7/6). Matching connectors are
available (see Section 1.3).
In inlet pressure for the gas ballast should be about 1000
mbar (absolute) and sufficient quantities of gas must be
available (about 1/10 of the pumping speed).
Never operate the pump with a sealed
exhaust line. There is the danger of injury.
Before starting any work on the pump, the
personnel must be informed about possible
dangers first. All safety regulations must be
observed.
2.3 Electrical Connections
Before wiring the motor or altering the
wiring, ensure that mains supply for the
pump is off and that it can not be applied
inadvertently.
In order to prevent the pump from running
up unexpectedly after a mains power failu-
re, the pump must be integrated in the con-
trol system in such a way that the pump can
only be switched on again manually. This
applies equally to emergency cut-out arran-
gements.
Electrical connections must be done by a
qualified electrician as defined by VDE
0105 in accordance with the VDE 0100 gui-
delines.
Observe all safety regulations.
TRIVAC-B pumps are available with a single-phase or a
three-phase AC motor.
2.3.1 Pump with Single-Phase AC Motor
Pumps equipped with a single-phase AC motor may be
connected directly to the mains via the mains cord and
the mains plug.
At 230 V use an at least a 6 A slow-blow or a 10 A fast-
blow fuse.
The direction of rotation need not be checked as it is
fixed.
The motor is protected against overloading by a thermal
overload switch with automatic resetting.
If the thermal overload protector shuts off
the pump, the motor will restart itself as
soon as it cools. That’s why the mains plug
should be disconnected from the mains
before starting with any work on the pump.
10 GA 01.202/9.02 - 03/96
Warning
Warning
Caution
Warning

Operation
2.3.2 Pump with Three-Phase AC Motor
TRIVAC-B pumps with a three-phase motor are supplied
without accessories for electrical connection. They must
be connected via the appropriate cable, and a suitable
motor protection switch. Set the switch in accordance
with the rating on the motor nameplate.
Fig. 8 shows the connection for pumps with 230/400 V,
50 Hz motors. Please also observe the motor wiring dia-
gram in the junction box and the information given on the
nameplate of the motor.
After connecting the motor and after every
time you alter the wiring, check the direction
of rotation. To do so, briefly switch on the
motor and check whether a suitable cover
(e. g. a blank flange) is sucked on at the
intake port. If not, interchange two phases
of the connection.
Observe the direction arrow on the coupling
housing.
2.4 Start-up
Each time before starting up ensure that the oil level is
visible in the oil level glass.
For pumps with 3-phase motors, check the direction of
rotation before starting the pump for the first time and
after each change in the electrical connection (see Sec-
tion 2.3.2).
On initial start-up, after prolonged idle periods or after an
oil change, the specified ultimate pressure cannot be
attained until the oil is degassed. This can be done by
running the pump for approx. 30 min. with the intake line
closed and the gas ballast valve (7/5) open.
Before starting the pump ensure that the
pump and the fitted accessories meet the
requirements of your application and that
safe operation can be guaranteed.
Avoid exposure of any part of the body to
the vacuum. There is the danger of injury.
Never operate the pump with an open inta-
ke port. Vacuum connections as well as oil-
fill and oil-drain openings must never be
opened during operation.
The safety regulations which apply to the
application in each case must be observed.
This applies to installation, operation and
during maintenance (service) as well as
waste disposal and transportation.
The standard pump is not suited for pum-
ping of hazardous gases or vapours.
Our technical sales department is available for further
advice in these matters.
11
GA 01.202/9.02 - 03/96
Attention
Fig. 8 Connection diagram for TRIVAC-B with 50 Hz 3-phase motor
Delta connection Star connection
Caution

Operation
2.4.1 Areas of Application
The pump is not suitable for pumping of:
- ignitable and explosive gases or vapours
- oxidants
- pyrophorous gases.
The pumps are not suitable for pumping of
liquids or very dusty media. Suitable pro-
tective devices must be installed.
Our technical sales department is available for further
advice in these matters.
2.4.2 Remarks for Pumps with
EExe II T3-Motors
There are no objections against using the vacuum pump
in an explosion hazard area of ZONE 1, a temperature
class T3 and explosion group IIB provided the following
conditions will be fulfilled:
Caution Install a suitable motor protection switch in
front of the vacuum pump’s electric motor. If
the vacuum pump is supplied as ready-to-
plug-in unit the customer himself must
install the motor protection switch and in a
pressure-resistant encapsulation version.
If the vacuum function fails the vacuum
pump must be switched off automatically
via an interruption of the power supply.
Due to the measures taken the vacuum
pump is not suited to pump oxygen and
explosive atmosphere.
12 GA 01.202/9.02 - 03/96
Caution

Operation
2.5 Operation
TRIVAC-B pumps can pump condensable gases and
vapours, provided that the gas ballast valve (7/5) is open
and the pump has attained its operating temperature.
2.5.1 Pumping of Non-Condensable Gases
If the process contains mainly permanent gases, the
pump may be operated without gas ballast, provided that
the saturation vapour pressure at operating temperature
is not exceeded during compression.
If the composition of the gases to be pumped is not
known and if condensation in the pump cannot be ruled
out, run the pump with the gas ballast valve open in
accordance with Section 2.5.2.
2.5.2 Pumping of Condensable Gases and
Vapours
With the gas ballast valve open and at operating tempe-
rature, TRIVAC-B pumps can pump pure water vapour
up to the water vapour tolerance specified by the techni-
cal data. If the vapour pressure increases above the per-
missible level, the water vapour will condense in the oil
of the pump.
When pumping vapours ensure that the gas ballast valve
is open and that the pump has been warmed up for
approximately 30 minutes with the intake line closed.
Vapour phases may only be pumped up to
the permissible limit after the pump has
attained its operating temperature.
During pumping, vapours may dissolve in
the oil. This changes the oil properties and
thus there is a risk of corrosion in the pump.
Therefore, don’t switch off the pump imme-
diately after completion of the process.
Instead, allow the pump to continue opera-
ting with the gas ballast valve open and the
intake line closed until the oil is free of con-
densed vapours. We strongly recommend
operating the TRIVAC-B in this mode for
about 30 minutes after completion of the
process.
In cyclic operation, the TRIVAC-B should not be swit-
ched off during the intervals between the individual wor-
king phases (power consumption is minimal when the
pump is operating at ultimate pressure), but should con-
tinue to run with gas ballast valve open and intake port
closed (if possible via a valve).
Once all vapours have been pumped off from a process
(e.g. during drying), the gas ballast valve can be closed
to improve the attainable ultimate pressure.
2.5.3 Operating Temperature
Proper operation of the TRIVAC-B is ensured in the
ambient temperature range between 12 °C to 40 °C
(55 °F to 104 °F).
At operating temperature, the surface temperature of the
oil case may lie between 40 °C and over 80 °C (104 °F
and 176 °F), depending on the load.
The surface temperature of the TRIVAC-B
pumps may rise above 80 °C.
There is the danger of receiving burns.
13
GA 01.202/9.02 - 03/96
Attention
Caution

Operation
2.6 Switching Off/Shutdown
Under normal circumstances, all that you need do is to
electrically switch off the TRIVAC-B.
No further measures will be required.
When pumping condensable media let the pump conti-
nue to operate with the gas ballast valve open and the
intake line closed before switching off (see Section
2.5.2).
When pumping aggressive or corrosive media, let the
pump continue to operate even during long non-working
intervals (e.g. overnight) with the intake line closed and
the gas ballast valve open. This avoids corrosion during
idle periods.
If the TRIVAC-B is to be shutdown for an extended peri-
od after pumping aggressive or corrosive media or if the
pump has to be stored, proceed as follows:
When pumping harmful substances, take
adequate safety precautions.
Our technical sales department is available for further
advice in these matters.
Drain the oil (see Section 3.2).
Add clean oil until the oil-level is at the „min“ mark (see
Section 3.2) and let the pump operate for some time.
Then drain the oil and add clean oil until the oil level is at
the „max“ mark (see Section 3.2).
Seal the connection ports. Special conservation or anti-
corrosion oils aren’t necessary.
Please also take note of the information
given in Section 3.9 (storage and storage
conditions).
2.6.1 Shut-Down through Monitoring Com-
ponents
When the pump has been switched off due
to overheating sensed by the motor coil pro-
tector or other monitoring components at
the pump (e. g. thermal sensor), the pump
must only be started manually after the
pump has cooled down to the ambient tem-
perature and after having removed the
cause first.
2.6.2 Failure of the Control System or the
Mains Power
In order to prevent the pump from running
up unexpectedly after a mains power failu-
re, the pump must be integrated in the con-
trol system in such a way that the pump can
only be switched on again manually. This
applies equally to emergency cut-out arran-
gements.
14 GA 01.202/9.02 - 03/96
Caution
Attention
Caution
Caution

GA 01.202/9.02 - 03/96
Operation
3 Maintenance
Disconnect the electrical connections befo-
re disassembling the pump. Make absolute-
ly sure that the pump cannot be accidental-
ly started.
If the pump has pumped harmful sub-
stances, contrary to what has been stated
in Section 2.4, ascertain the nature of
hazard and take adequate safety measu-
res.
Observe all safety regulations.
If you send a pump to LEYBOLD for repair please indi-
cate any harmful substances existing in or around the
pump. A form is available from LEYBOLD for this purpo-
se.
When disposing of used oil, you must
observe the applicable environmental regu-
lations. !
Due to the design concept, TRIVAC-B pumps require
very little maintenance when operated under normal
conditions. The work required is described in the sec-
tions below. In addition to this, a maintenance plan is
provided in Section 3.10.
All work must be carried out by suitably trai-
ned personnel. Maintenance or repairs car-
ried out incorrectly will affect the life and
performance of the pump and may cause
problems when filing warranty claims.
LEYBOLD offers practical courses on the maintenance,
repair, and testing of TRIVAC-B pumps. Further details
are available from LEYBOLD on request.
If the TRIVAC-B is used in ambient air
which is much contaminated, make sure
that the air circulation and the gas ballast
valve are not adversely affected.
Pls. take the spare parts numbers from the
enclosed spare sparts list.
In case of special designs and variants
please always indicate the special, variant
and serial number.
3.1 Checking the Oil Level
During operation of the TRIVAC-B the oil level must
always remain between marks (9/2) and (9/3) on the oil-
level glass. The amount of oil must be checked and top-
ped up as required.
Fill in oil only after the pump has been swit-
ched off.
3.1.1 Checking the Condition of N 62 or
HE-200 Oil
The amount of oil required for an oil check should be
drained via the oil-drain port (9/4) into a beaker or simi-
lar container with the pump switched off but still at ope-
rating temperature.
• Visual check
Normally the oil is clear and transparent. If the oil dar-
kens, it should be changed.
• Chemical check
The neutralisation number of N 62 oil is determined
according to DIN 51558. If it exceeds 2,
the oil should be changed.
• Viscosity check
If the viscosity of N 62 oil at 25 °C exceeds 300 mPas,
the oil should be changed.
If gases or liquids dissolved in the oil result in a deterio-
ration of the ultimate pressure, the oil can be degassed
by allowing the pump to run for approx. 30 min. with the
intake port closed and the gas ballast valve open.
15
Caution
Attention
Attention
Attention
Attention

Screw the oil-drain plug back in (check the flat gasket
and reinstall a new one if necessary).
Remove the oil-fill plug (9/1) and fill in with fresh oil.
Screw the oil-fill plug (9/1) back in.
If there is the danger that the operating
agent may present a hazard in any way due
to decomposition of the oil, or because of
the media which have been pumped, you
must determine the kind of hazard and
ensure that all necessary safety precauti-
ons are taken.
We can only guarantee that the pump ope-
rates as specified by the technical data if
the lubricants recommended by us are
used.
Maintenance
3.2 Oil Change
For proper operation of the pump, it is essential that the
pump has an adequate supply of the correct and clean
oil at all times.
The oil must be changed when it looks dirty or if it
appears chemically or mechanically worn out (see Sec-
tion 3.1.1).
The oil should be changed after the first 100 operating
hours and then at least every 2,000 to 3,000 operating
hours or after one year. At high intake pressures and
intake temperatures and/or when pumping contaminated
gases, the oil will have to be changed more frequently.
Further oil changes should be made before and after
long-term storage of the pump.
If the oil becomes contaminated too quickly, install a dust
filter and/or oil filter (see Section 1.3).
Contact us for more information in this matter.
Only change the oil after the pump has
been switched off and while the pump is still
warm.
Required tool: Allen key 8 mm.
Remove the oil-drain plug (9/4) and let the used oil drain
into a suitable container. When the flow of oil slows
down, screw the oil-drain plug back in, briefly switch on
the pump (max. 10 s) and then switch it off again. Remo-
ve the oil-drain plug once more and drain out the remai-
ning oil.
16 GA 01.202/9.02 - 03/96
Attention
Abb. 9 Oil change
Key to Fig. 9
1 Oil-fill plug
2 Oil-level mark maximum
3 Oil-level mark minimum
4 Oil-drain plug
1
2
3
4
Caution

Maintenance
3.3 Cleaning the Dirt Trap
A wire-mesh sieve is located in the intake port of the
pump to act as a dirt trap for coarse particles. It should
be kept clean to avoid a reduction of the pumping speed.
For this purpose, remove the dirt trap (2/2) from the inta-
ke port and rinse it in a suitable vessel with solvent. Then
thoroughly dry it with compressed air. If the dirt trap is
defective, replace it with a new one.
The cleaning intervals depend on the appli-
cation. If the pump is exposed to large amo-
unts of abrasive materials, a dust filter
should be fitted into the intake line.
3.4 Removing and Fitting
the Internal Demister
Required tools:
Allen keys 5 mm and 8 mm.
The internal demister is spring-mounted in a frame.
When it is clogged, it rises periodically to reduce the
pressure difference created.
The resultant noise at high intake pressures indicates
that the internal demister is dirty.
Periodically clean or replace the internal demister; the
maintenance interval depends on the application. Use a
suitable solvent for cleaning.
Shutdown the pump and drain the oil (see Section 3.2).
Pull the handle upward.
Remove the five recessed screws (10/5) on the oil case
(10/1). Don’t remove the non-recessed screws; they hold
the motor flange in place.
Pull the oil case forward off the pump.
Remove the gasket (10/7).
Press the spring buckles (10/2) sideways away from the
frame (10/4). Lift off the frame (10/4) and remove the
internal demister (10/3).
Clean all parts and check that they are in perfect condi-
tion; if not, replace them with new parts.
Reassemble in the reverse order.
Torque for the screws (10/5) is 5 Nm.
17
GA 01.202/9.02 - 03/96
Attention
Attention
Fig. 10 Removal and fitting of the internal demister
Key to Fig. 10
1 Oil case
2 Spring buckles
3 Demister
4 Frame for demister
5 Hex. socket screws (5 pcs.)
6 Silencing nozzle
7 Gasket

GA 01.202/9.02 - 03/96
Maintenance
3.5 Disassembly and Reas-
sembly of the Electric
Motor
Before starting work, always disconnect the
motor from the mains.Disconnect the wires
in the junction box of the motor (three-
phase models only) or pull the mains plug.
Required tools:
Screwdriver 1.0 x 5.5 mm (for junction box), open-jaw
wrenches 7 mm and 19 mm (for junction box),Allan keys
2.5 mm, 3 mm, 5 mm, 6 mm, possibly puller for coupling.
Place the pump on its front side.
Unscrew the four non-recessed hex. socket screws
(11/3).
Remove the intermediate flange (11/5) together with the
electric motor (11/4).
Remove the handle (11/2).
Loosen the threaded pin (11/8) and pull the coupling
(11/7) off the motor shaft.
Take off the gasket (11/1).
Unscrew the hex. socket screws (11/6).
Remove the electric motor.
Clean all parts and check that they are in perfect condi-
tion; if not, replace them with new parts.
Reassemble in the reverse order.
In the case of 60 Hz motors (USA versions) the coupling
must not be pushed on to the shaft right up to the stop.
On the other hand if it is not pushed on far enough the
pump module may be damaged during operation.
Push the coupling on in such a way that the distance bet-
ween the front end of the coupling (11/7) and the gasket
(11/1) on the intermediate flange amounts to 21.4 mm
(27/32 inch).
18
Caution
Fig. 11 Disassembly and reassembly of the electric motor
Key to Fig. 11
1 Gasket
2 Handle
3 Hex. socket screw
4 Electric motor
5 Intermediate flange
6 Hex. socket screw
7 Coupling
8 Threaded pin

Fig. 12 Exchanging the outer shaft seal
Key to Fig. 12
1 Coupling element
2 Hexagon socket screw
3 Spring washer
4 Coupling (one half)
5 Key
6 Bushing
7 O-ring
8 Shaft seal
9 Centering disk
10 Hexagon socket screws
Position of the shaft seal
GA 01.202/9.02 - 03/96
Maintenance
3.6 Replacing the Outer
Shaft Seal
Required tools:
Allen keys 3 mm, 5 mm, 8 mm, flat-nose pliers, plastic
hammer, shaft seal driver, possibly puller for coupling.
The TRIVAC 16/25 B has two shaft seals; the outer one
is subject to greater wear. Oil marks under the coupling
housing are signs of a damaged outer shaft seal.
The outer shaft seal (12/8) can be replaced without
removing or disassembling the pump module.
Shutdown the pump.
Drain the oil (see Section 3.2) or place the pump on its
front side.
Unscrew the four non-recessed hex. socket screws
(11/3) and remove the motor (11/4) together with the
intermediate flange (11/5).
Remove the coupling element (12/1).
Remove the hex. socket screw (12/2) and the spring
washer (12/3).
Pull off the coupling (12/4).
Remove the key (12/5).
Unscrew the hex. socket screws (12/10) and pull off the
centering disk (12/9).
If the centering disk is stuck, screw the capscrews
(12/10) into the jackscrew holes in the centering disk.
Carefully force the shaft seal (12/8) out of the centering
disk.
Carefully pull off the bushing (12/6) from the shaft and
remove the O-ring (12/7).
We recommend the use of a new shaft seal, an O-ring
and bushing for reassembly.
Before insertion, moisten the new shaft seal slightly with
a little vacuum pump oil.
Using a suitable plastic or aluminium cylinder (shaft seal
driver) and a plastic hammer, force the shaft seal (12/8)
carefully and without bending it into the centering disk
(for position of shaft seal, see Fig. 12).
19

GA 01.202/9.02 - 03/96
Maintenance
If you do not have a shaft seal driver, place the shaft seal
on the centering disk and carefully force it in with light
blows of the plastic hammer.
The shaft seal must not be bent.
Carefully push the O-ring (12/7) and the bushing (12/6)
onto the shaft.
Push the centering disk (12/1) with the shaft seal onto
the shaft and up against the end plate; fasten it with the
hex. socket screws (12/10).
Insert the key (12/5).
Mount the pump-half of the coupling (12/4) on the shaft.
Install the spring washer (12/3) and tighten the screw
(12/2).
Insert the coupling element (12/1) into the coupling and
mount the motor (see Section 3.5).
3.7 Removing and Remoun-
ting the Pump Module
Required tools:
Allen keys 3 mm, 5 mm, 8 mm, box wrench 10 mm, pos-
sibly pliers.
3.7.1 Removing the Pump Module
Drain the oil and remove the oil case (see Section 3.4).
Unscrew the hex. nuts (13/1).
Pull the entire pump module (13/2) forward off the tie
rods (13/6).
When doing so, ensure that the individual
pin-fitted parts are not loosened. Further
disassembly of the pump module should
only be carried out by a trained service
engineer.
Remove the gasket (13/4).
Take the coupling element (13/5) off the coupling.
After removing the protective shipping
materials, handle the new pump module
with care.
Before installing a new pump module, remove the four
tie rods from the new module and insert them in the old
one for protection during shipment.
3.7.2 Remounting the Pump Module
When installing a new pump module, it is also advisable
to use a new gasket (13/4).
Check the coupling element (13/5) for damage; if neces-
sary, install a new one.
Use the tie rods supplied with the new pump module only
if the old ones are damaged. To do so, unscrew the old
tie rods with lock nuts, and screw in the new ones. With
the aid of the lock nuts, tighten the tie rods. Then remo-
ve the lock nuts.
Before mounting the pump module, make sure that sea-
ling disc (13/3) fits correctly in its bore.
Push the gasket (13/4) onto the tie rods (13/6), push the
coupling element (13/5) onto one coupling half.
Push the entire pump module (new or repaired) onto the
tie rods.
Screw on the hex. nuts (13/1) and carefully
cross-tighten them (torque 7.5 Nm).
Mount the oil case together with the gasket (see Section
3.4).
Fill in oil.
3.8 Service at Leybold’s
If a pump is returned to Leybold, indicate whether the
pump free of substances damaging to health or whether
it is contaminated.
If it is contaminated also indicate the nature of the
hazard. For this you must use a form which has been
prepared by us which we will provide upon request.
A copy of this form is reproduced at the end of these
Operating Instructions: „Declaration of Contamination of
Vacuum Instruments and Components“.
Please attach this form to the pump or enclose it with the
pump.
This „Declaration of Contamination“ is required to meet
German Law and to protect our personnel.
Leybold must return any pumps without a „Declaration of
Contamination“ to the sender’s address.
The pump must be packed in such a way,
that it will not be damaged during shipping
and so that any contaminants are not relea-
sed from the package.
20
Attention
Attention
Caution
Attention