NetterVibration NTS 100/01 User manual

Serving industry with vibration
Netter GmbH Germany Switzerland
www.NetterVibration.com
FritzUllmannStraße 9 Erlenweg 4
55252 MainzKastel
4310 Rheinfelden
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NetterVibration
Poland
Al. W. Korfantego 195 / 17
40153 Katowice
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Assembly and operating instructions for
Netter Pneumatic Linear Vibrators
Series NTS from 1994
Dec2009
BA No. 1050 E
Page 1/16
These operating instructions apply for:
Group 1
NTS 100/01
NTS 75/01
NTS 50/01
NTS 70/02
NTS 54/02
NTS 50/04
NTS 21/04
NTS 50/08
Group 2
NTS 50/10
NTS 30/10
NTS 50/15
NTS 50/20
NTS 30/20
NTS 24/20
NTS 50/40
NTS 20/40
Important note:
Before use of the pneumatic linear vibrators series NTS read this operating
instruction carefully and store afterwards.
Netter GmbH does not assume liability for damage to property and persons if the
product has been technically modified or if the notes and regulations of these
operating instructions have not been observed.
This documentation is copyrighted. All rights, e.g. for translation into other languages,
reprinting and copying of these operating instructions or parts hereof remain strictly
reserved.

2
Table of Contents
1GENERAL NOTES 3
2TECHNICAL DATA 3
3DESIGN AND FUNCTION 6
4SAFETY 7
5TRANSPORT AND STORAGE 8
6INSTALLATION 8
7START-UP / OPERATION 12
8SERVICE, MAINTENANCE 14
9TROUBLESHOOTING 15
10 SPARE PARTS 15
11 APPENDIX 16
11.1 Accessories 16
11.2 Disposal 16
11.3 Enclosures 16
Scope of delivery:
Check the packing for possible shipping damage.
If the packing is damaged check the contents for completeness and possible damage.
In case of damage inform the transport agent. Compare the scope of supply with the
delivery note.
In these operating instructions the following information and danger symbols are used.
Notes on important processes Warning of a danger source
Important note on processes to
be especially observed Environmental waste disposal

3
1 General notes
Pneumatic linear vibrators of series
NTS are partly completed machineries
and comply with the EC-machine
regulation 2006/42/EG. In particular,
standards DIN EN ISO 12100, part 1
and 2 have been observed.
The vibrators generate directed linear
vibrations or shaking movements.
General areas of application are:
loosening, conveying, compacting as
well as separating of bulk materials
and reducing of friction.
NTS - vibrators are used to empty
bunkers, to drive conveyor troughs,
sieves and vibrating tables.
Applications in the food industry as
well as in wet environments are also
possible, when complying with the
operating instructions of the operating
company.
The drive medium is compressed air
or nitrogen.
NTS vibrators may be operated in
dusty or wet environments.
Operation without silencer should be
avoided in order to protect the
environment against high noise.
2 Technical Data
Drive medium:
Clean (5 µm filter) compressed air or nitrogen
Unfiltered air or nitrogen will cause damage to the vibrators.
Operating pressure:
2 bar to 6 bar*
Operating pressures must not be exceeded or fallen short of
Ambient temperature:
5°C to 60° C*
Operating temperatures must not be exceeded or fallen short of.
Lubrication:
If advised by application engineers of Netter GmbH and in compliance
with locally specified conditions, vibrators of group 1 may be operated
without oil. (Exception 1: In case of freeze-dried air and under extreme
ambient conditions, Exception 2: NTS 21/04).
Units of group 2 and the NTS 21/04 must only be operated with
lubricated compressed air or lubricated nitrogen.
*) Higher operating pressures and temperatures are only permitted after consultation and written confirmation by
application engineers of Netter GmbH.

4
Type Hou-
sing
mate-
rial
Working moment Nominal frequency Linear force Air
consumption Noise level
[cmkg] [min-
1
] [N] [l/min] [dB(A)]
2 bar 4 bar 6 bar 2 bar 4 bar 6 bar 2 bar 4 bar 6 bar 2 bar – 6 bar 2 bar – 6 bar
NTS 100/01* AL 0,33 0,43 0,41 3.920 4.640 5.840 281 513 764 33 – 181 68 – 80
NTS 75/01* AL 1,01 1,31 1,44 2.848 3.596 4.038 451 934 1.291 99 – 442 67 – 81
NTS 50/01* AL 2,18 2,62 2,66 1.924 2.408 2.825 442 834 1.164 88 – 416 76 – 84
NTS 70/02* AL 2,81 2,77 3,04 2.096 2.808 3.336 676 1.186 1.847 128 – 564 76 – 87
NTS 54/02* AL 4,54 5,51 5,07 1.730 2.064 2.544 745 1.288 1.800 152 – 698 80 – 89
NTS 50/04* AL 7,90 9,80 9,70 1.920 2.296 2.672 1.591 2.844 3.789 271 – 977 77 – 86
NTS 21/04 AL 34,90 45,90 49,10 941 1.156 1.334 1.694 3.362 4.786 225 – 718 73 – 83
NTS 50/08* AL 11,30 15,30 17,00 1.977 2.331 2.669 2.426 4.555 6.642 216 – 803 81 – 90
NTS 50/10 GG 14,50 17,90 18,90 1.983 2.392 2.809 3.128 5.626 8.174 454 – 1.647 82 – 92
NTS 30/10 GG 50,00 80,00 96,00 840 1.044 1.300 1.940 4.780 8.900 312 – 1.438 75 – 85
NTS 50/15 GG 25,00 32,70 35,80 1.830 2.209 2.464 4.589 8.754 11.922 726 – 2.108 81 – 91
NTS 50/20 GG 24,70 34,20 37,30 1.823 2.252 2.591 4.511 9.527 13.737 887 – 2.491 81 – 92
NTS 30/20 GG 57,30 84,80 92,60 1.227 1.528 1.759 4.727 10.852 15.693 551 – 2.014 78 – 88
NTS 24/20 GG 94,20 126,60 144,80 936 1.176 1.388 4.515 9.596 15.290 642 – 2.083 75 – 80
NTS 50/40 GG 72,50 93,00 99,50 1.335 1.617 1.920 7.090 13.333 20.114 994 – 3.296 80 – 92
NTS 20/40 GG 218,90 286,70 302,30 827 985 1.147 8.227 15.239 21.808 1.340 – 4.252 77 – 89
These technical data are reference values and may vary in dependence on the application, further data on request.
*) oil free operation possible
Noise level:
The noise level is mainly determined by
the mounting surface (e.g. sheet metal)
the vibrator is mounted on. Depending on
type (with silencer) and an air pressure of
6 bar the noise level is 80-85 dB(A), it is
less if the air pressure is reduced. Sheet
metal without noise insulation amplifies
the noise level.
Duration of operation:
Long operating periods change the
performance data (wear).
Please observe when choosing:
Linear vibrators of type NTS are available in two different designs.
Group 1:
Housing made of aluminium, hard-coated, cover made of plastic,
installed starting spring for horizontal or slightly inclined installation.
(Exception: NTS 21/04 without starting spring).
If advised by application engineers of Netter GmbH and in compliance
with locally specified conditions, these vibrators may be operated
without oil. (Exception: NTS 21/04).
Group 2:
Housing made of steel or continuous casting, surface treated, base
plate made of steel. Connection for starting impulse.
These vibrators and the NTS 21/04 must only be operated with
lubricated compressed air or lubricated nitrogen.
Operation of NTS vibrators requires the installation of a 3/2-way valve to
ensure problem-free starting. This valve also ensures immediate
stopping when switching off. At temperatures ≤10 °C higher starting
pressures (more than 2 bar) may be required.

5
Dimensions:
Typ A
[mm]
B
[mm]
C
[mm]
D
[mm]
Ø E
[mm]
F
[mm]
G
[mm]
H
[mm]
I
[mm]
K
Abluft
L
Zuluft
Abluft
an
Seite
Zuluft
*
∠°
Abluft
**
∠°
Gehäuse
[kg]
Kolben
[kg]
Gesamt
[kg]
kqp=NMMLMN= UV= Õ=SV= SV= J= j= OM= SRIR QUIR PNIR dNLQ dNLQ P= = = MISQ= MIPS= NIM=
kqp=TRLMN= NNR= VM= UM= TO= VIM= OM= UN= SM= PU= dNLQ dNLQ O= = = NIN= MIU= NIV=
kqp=RMLMN= NRR= VM= UM= TO= VIM= OM= NON UM= QM= dNLQ dNLQ O= = = NIR= NIQ= OIV=
kqp=TMLMO= NPM= NNM= NMM= VM= VIM= OM= VN= SR= PV= dPLU dPLU O= = = NIV= NIO= PIN=
kqp=RQLMO= NRT= NNM= NMM= VM= VIM= OM= NNO TV= QR= dPLU dPLU O= = = OIP= NIS= PIV=
kqp=RMLMQ= NRT= NRM= NPV= NOQ= NP= OM= NNP TV= QQ= dPLU dPLU O= = = QIM= QIP= UIP=
kqp=ONLMQ= PPM= NRM= NPV= NOQ= NP= OM= OUM NSR QV= dPLU dPLU O=H=Q= = = UIR= NOIR= ON=
kqp=RMLMU= NTP= OMM= NTM= NSR= NT= PM= NOR VO= RU= dPLU dPLU O=H=Q= = = VIM= TIN= NSIN=
kqp=RMLNM= NRT= OMM= NVM= NSR= NU= OM= NNO TV= QR= dPLU dNLO O=H=Q= M= VM= OM= VIM= OV=
kqp=PMLNM= PQM= OMM= NVM= NSR= NU= OM= OUV NTM RO= dPLU dNLO O=H=Q= M= VM= QN= OR= SS=
kqp=RMLNR= NUR= OPM= OOM= NVM= OO= PM= NPQ VR= RS= dPLU dPLQ N=J=Q= M= PM= PO= NR= QT=
kqp=RMLOM= NVM= ORM= ORM= ONM= OO= PM= NPQ VR= RT= dPLU dPLQ N=J=Q= OOIR= OOIR= QO= NV= SN=
kqp=PMLOM= OTU= ORM= ORM= ONM= OO= PM= ONU NPV SN= dPLU dPLQ N=J=Q= QR= QR= RQ= PT= VN=
kqp=OQLOM= PSM= ORM= ORM= ONM= OO= PM= OVU NUM SO= dPLU dPLQ N=J=Q= = = SU= RQ= NOO=
kqp=RMLQM= OSS= POM= POM= OSM= OS= QM= NVQ NPP TO= dNLO d=N= N=J=Q= OM= OM= UV= RO= NQN=
kqp=OMLQM= QTM= POM= POM= OSM= OR= QM= PVO OPR TU= dNLO d=N= N=J=Q= = = NPQ= NOR= ORV=
* From size NTS 50/10 upwards the inlet supply port L is moved up to max. 45°.
** From size NTS 50/10 upwards the exhaust supply port K is moved up to max. 90°.

6
3 Design and function
Vibration is generated by a freely
oscillating, automatically reversing
piston. Both masses, the piston on the
one side and the mass fastened to the
housing on the other, thereby vibrate
against each other in proportion to their
total weights.
Compressed air or nitrogen enters
through port 1into the housing and is
alternately guided through a groove
and the pilot bores in piston 3into the
air chambers 9and 10. The changing
pressure in these chambers drives the
piston.
The presently depressurized chamber
is ventilated through the openings 6.
Once the piston passes past these
openings the air can no longer escape
– leaving an air cushion. This prevents
a hard impact and initiates an
additional impulse, to the linear force.
If a lower vibration amplitude is
required, simply throttle the exhaust air
flow.
If a lower frequency is required, just
throttle the air supply, e.g. by means of
a pressure regulator.
The illustration shows a piston position
which may occur in case of horizontal
mounting. In this position the vibrator
will not start. For this reason units of
group 2 have a port 11 in the base
plate 5, so that the piston 3can be
moved to the start position by applying
a short pressure shock. This requires
an additional 2/2-way valve.
Units of group 1 are equipped with a
starting spring between base plate 5
and piston 3 (Exception: NTS 21/04
without starting spring).
1
2
3
4
5
6
9
10
11
12
Air inlet
Cover
Piston
Housing
Base plate
Exhaust port
Air chamber
Air chamber
Start port (optional)
Bore for synchronizing
control (optional)

7
4 Safety
NTS vibrators work with
compressed air or nitrogen.
Make sure the compressed air or
nitrogen supply is switched off
during installation.
Disconnect the supply lines (quick
coupling) before starting other work
on vibrators and supply lines.
Before starting operation all hoses
must be tightly connected.
A pressurized hose coming loose
can cause severe injury.
Vibrator as well as part of the
structure can detach because of
vibration. Falling parts can cause
damage to persons and material.
Screw retention components and/or
Loctite or similar must be used.
Jan. / Feb. / ...
Screw connections must be checked and, if necessary, retightened after 1
hour of operation and then controlled at regular intervals (normally each
month).
In critical installation situations the unit must be secured with a steel rope.
Silencer:
Operation without silencer should
be avoided in order to protect the
environment against high noise
values.

Technical changes to the equipment may effect the characteristics of the
vibrators or even damage the units and cause the rejection of any
warranty claims.
Permissible operating conditions:
Operating pressure:
2 bar to 6 bar*
Operating pressures must not be exceeded or fallen short of.
Ambient temperature:
5°C to 60° C*
Operating temperatures must not be exceeded or fallen short of.
Lubrication:
If advised by application engineers of Netter GmbH and in compliance with
locally specified conditions, vibrators of group 1 may be operated without
oil. (Exception 1: In case of freeze-dried air and under extreme ambient
conditions, Exception 2: NTS 21/04).
Units of group 2 and the NTS 21/04 must only be operated with lubricated
compressed air or lubricated nitrogen.
*) Higher operating pressures and temperatures are only permitted after consultation and written confirmation by
application engineers of Netter GmbH.

8
5 Transport and Storage
Check the packing for possible shipping damage.
If the packing is damaged check the contents for completeness and
possible damage. In case of damage inform the transport agent.
Compare the scope of supply with the delivery note.
The units are packed ready for
installation.
The name plate is fixed on the vibrator.
If lubricated compressed air or nitrogen
are required, the unit is delivered with
a corresponding note next to the air
inlet port.
If not specified differently, accessories
and additional components (grommet,
silencer) will be supplied unmounted.
Special transport conditions are not
specified.
The units should be stored in a dry and
clean environment.
Linear vibrators of type NTS must be
oiled before being returned for storage
(squirt machine oil into the air inlet port
and actuate the vibrator for a short
while).
On oil-free versions cleaning of the unit
is recommended (dismantle, if
necessary wipe off deposits with oil,
wipe clean, reassemble).
The storage temperature may be
between -40°C and +120 °C.
(This does not concern the
operating temperature, see chapter
4 SAFETY, “Permissible
Operating Conditions”).
6 Installation
During installation please comply
strictly with the safety regulations in
chapter 4 and the accident
prevention instructions!
Make sure the compressed air
supply is switched off during
installation or when working on
vibrator and air supply lines.
Mounting the vibrator:
The housing of the linear vibrator must
be bolted to the mass to be vibrated.
The mounting surfaces must be
absolutely even (±0.1mm flatness
tolerance), so that the vibrator has full
area contact and warping of the housing
is avoided when tightening the fastening
screws. The surfaces should also be
free of any paint residues and weld
penetrations. Tensions in the housing
may cause mechanical damage.
The unit generates directed vibrations.
The working moment of the freely
oscillating piston determines the
amplitude.
In critical installation situations the unit must be secured with clamp and
steel rope.

9
A B C
The illustrations show possible applications:
Aon vibrating tables for compaction, testing etc.
Bunder tables, on filters etc. for shaking
Con bunkers for emptying, on vibrating troughs and sieves
As a protection against loosening use self-locking screws and nuts, self-
locking lock washers (no spring rings) or use a liquid screw retention
agent, e.g. Loctite 270.
The tightening torques can be taken
from the following table. Higher
tightening torques may cause fracture
of screws or tearing of threads.
Inadequate screw connections may
cause loosening of units by vibration.
This can cause damage to persons and
material!
Recommended average tightening torques for property class 8.8 screws
(screws as delivered, without additional lubrication):
Type Thread Tightening torque
NTS 100/01 M 12 30 Nm
NTS 75/01 M 8 25 Nm
NTS 50/01 M 8 25 Nm
NTS 70/02 M 8 25 Nm
NTS 54/02 M 8 25 Nm
NTS 50/04 M 12 87 Nm
NTS 21/04 M 12 87 Nm
NTS 50/08 M 16 215 Nm
NTS 50/10 M 16 215 Nm
NTS 30/10 M 16 215 Nm
NTS 50/30 M 16 215 Nm
NTS 50/20 M 20 430 Nm
NTS 30/20 M 20 430 Nm
NTS 24/20 M 20 430 Nm
NTS 50/40 M 24 740 Nm
NTS 20/40 M 24 740 Nm
Use a torque wrench and tighten the screws in a crosswise pattern.
Retightening:
Screw connections must be checked and, if necessary, retightened after
1 hour of operation (after initial start-up) and then at regular intervals
(normally each month).

10
When using compressed air or
nitrogen as drive medium, it must be
clean (filtered). Unfiltered air leads to
excessive wear, clogging of the
silencer and complete damage of
the vibrator (seizure of piston).
The compressed air or nitrogen
supply must be reliably fastened.
≤5 µm
filter recommended
Please observe already during installation:
The permissible temperature range must not be exceeded or fallen short
of during operation, see Chapt. 4 „Safety – Permissible Operating
Conditions“.
Versions for other temperature ranges on request.
Air supply line:
The pressure drop increases with the
hose length. The nominal widths in the
table apply for hose lengths of up to 3
m. Longer supply lines need bigger
cross-sections.
Air discharge line:
Exhaust air can be discharged through
a hose.
If full power of the linear vibrator is
required, the air discharge hose must
have a bigger cross-section than the
air supply hose. The free end should
be fitted with a silencer.
Minimum cross-sections for valves and hoses:
Type Connection threads Hose size 3/2-way valve (size)
NTS 100/01 G 1/4 NW 10 G 1/4 NW 6
NTS 75/01 G 1/4 NW 10 G 1/4 NW 6
NTS 50/01 G 1/4 NW 10 G 1/4 NW 6
NTS 70/02 G 3/8 NW 12 G 1/4-3/8 NW 7
NTS 54/02 G 3/8 NW 12 G 1/4-3/8 NW 7
NTS 50/04 G 3/8 NW 12 G 3/8-1/2 NW 9-12
NTS 21/04 G 3/8 NW 12 G 3/8-1/2 NW 9-12
NTS 50/08 G 3/8 NW 12 G 3/8-1/2 NW 9-12
NTS 50/10 G 1/2 NW 13 G 1/2 NW 12
NTS 30/10 G 1/2 NW 13 G 1/2 NW 12
NTS 50/15 G 3/4 NW 19 G 3/4 NW 19
NTS 50/20 G 3/4 NW 19 G 3/4 NW 19
NTS 30/20 G 3/4 NW 19 G 3/4 NW 19
NTS 24/20 G 3/4 NW 19 G 3/4 NW 19
NTS 50/40 G 1 NW 25 G 1 NW 25
NTS 20/40 G 1 NW 25 G 1 NW 25
Do not use fittings with threads longer than specified (e.g. no tubes with
male thread). The housing may thereby be deformed – the piston will
seize.
Make sure that no Teflon tape will enter into the unit. This would cause
seizure. The first two windings of the thread should remain free!
The base plate must have full contact. Otherwise the housing may warp
and the unit will not start.

11
Synchronized operation of 2 or more vibrators is possible when using a
coupling set. Vibrators from NTS 50/10 upwards already have the
necessary bore in the cover or it can be added by simply changing the
cover.
Synchronized operation: For operation
of two vibrators the air supply line must
be connected to both vibrators via a Y-
shape distributor. Here it is absolutely
necessary that the lengths and cross-
sections between Y-shaped distributor
and vibrators are absolutely identical.
Connection of both air chambers 1on
one piston rod side is accomplished by a
coupling kit, which enables synchronized
operation of the piston vibrators. In order
to ensure synchronized operation, the
hose connection (incl. elbows and
grommets) must have a predetermined
nominal width and hose length.
Please be aware that the use of longer
hoses causes a higher air consumption
and that this may adversely affect
synchronized operation. The
synchronization line should therefore be
designed as short as possible (A = 0.2 to
2 m, depending on vibrator type).
During synchronized operation the
connecting hose becomes extremely hot,
this requires the use of an appropriate
high temperature hose.
Checklist for installation
1)
2)
3)
4)
Install the unit. Lock the fastening screws crosswise.
Consider the expected operating temperature.
Install service unit (filter, if necessary regulator), valve, supply line.
Have fastening screws been locked? Check!
Has information on hose length and nominal width been observed?

12
7 Start-up / Operation
Start-up of the vibrators can be
performed immediately after the
correct installation.
At temperatures ≤10°C higher starting
pressures (more than 2 bar) may be
required. A start-up control starts the
unit with approx. 5 bar and then
reduces the pressure to 2 bar.
The frequency can be adjusted or
regulated with the pressure regulator
on the service unit. Use a 3/2-way
valve!
The amplitude can be regulated with a
throttle installed in the exhaust air
outlet.
Attention: Reduced cross-sections
(observe NW) already throttle.
Standard installation
Special plans on request
NTS 100/01 - 2-3 drops/min
If lubricated compressed air or nitrogen
is mandatory for the NTS (housing
group 2, orange or stainless steel
housing and the NTS 21/04):
Fill the oil-mist lubricator with acid-free
and resin-free pneumatic oil, ISO
viscosity class according to DIN 51519,
VG 5 to VG 15.
Please consider the operating
temperature:
In case of temperatures higher than
150°C (special versions) please
contact Netter GmbH.
NTS 75/01 - 2-3 drops/min
NTS 50/01 - 2-3 drops/min
NTS 70/01 - 2-3 drops/min
NTS 54/01 - 3-4 drops/min
NTS 50/04 - 4-5 drops/min
NTS 21/04 - 5-6 drops/min
NTS 50/08 - 5-6 drops/min
NTS 50/10 - 5-6 drops/min
NTS 30/10 - 5-6 drops/min
NTS 50/15 - 5-6 drops/min
NTS 50/20 - 5-6 drops/min
NTS 30/20 - 5-6 drops/min
NTS 24/20 - 5-6 drops/min
NTS 50/40 - 9-12 drops/min
NTS 20/40 - 9-12 drops/min
ATTENTION:
Adjust number of drops while unit is running.
Only after the adjustment and correct function of the lubricator the
unit is ready for operation.

13
When using freeze-dried air and
under extreme ambient conditions
the installation of an upstream
lubricator is required.
Operation with very short stop intervals
In case of operation with very short stop intervals (≈2 s.), it is possible
that the linear vibrator does not start immediately. The reason for this is
that the time is too short for the piston to be pushed into the end-position
by the spring (units group 1), or by gravitational force (units group 2).
Special versions are available for such applications.
Regulating the amplitude:
The amplitude can be regulated by
throttling the exhaust air (installation of
a throttle in the discharge port).
With this the linear force can be
reduced .
The frequency remains almost
constant.
Recommendation: Reduce the
amplitude only down to approx. 50%.
Below this value starting problems may
occur.
Regulating the frequency:
The frequency can be reduced by
throttling the air pressure at the inlet
port of the NTS.
This also reduces the linear force.
The amplitude remains almost
constant.
At constant main pressure the
pressure can be reduced by a throttle,
but more precisely by a pressure
regulator.
Checklist for commissioning:
1) Check hose connections before opening the compressed air supply.
2). Adjust the desired frequency on the pressure regulator.
3). Adjust the desired amplitude by throttling the exhaust air.
4). Adjust the lubricator, if existing.
The fastening screws for the vibrator must be retightened or checked
after 1 operating hour.

14
8 Service, Maintenance
When servicing the unit please observe the safety regulations in
chapter 4.
Retightening:
Screw connections must be checked and, if necessary, retightened after
1 hour of operation (after initial start-up) and then at regular intervals
(normally each month). On this occasion the specified torque must be
observed (see chapter 6).
Before starting inspection or service
work shut off the compressed air or
nitrogen supply and secure it
against unintended activation!
Check fastening of vibrator, air
connection incl. upstream service
unit and silencer – preferably at
monthly intervals.
Jan. / Feb. / ...
Mist lubricator:
With a lubricator connected in series
make sure that it works as specified
(contents diminishing? number of
drops/h?). Top up oil.
Filter:
Empty the filter when required, clean
the filter insert (wash out).
Cleaning
All NTS vibrators can be externally
cleaned with pressure water, as long
as the exhaust air is discharged
through a hose or the exhaust opening
is closed. Pressure water must not
enter through the silencer into the
piston chamber.
Contamination
Especially on oil free operated units
(NTS of group 1) a film may form,
which slows the vibrator down.
If this is noticed (power drop, possible
stand-still) the unit must be opened
and cleaned inside. The film must be
cleaned off with an oiled cloth from the
inside of the housing and from the
piston.
Further notes can be found in chapter
9 „Troubleshooting“.
The maintenance intervals mainly
depend on the purity of the
compressed air or nitrogen.

15
9 Troubleshooting
Fault Possible cause Remedy
No starting Silencer Clean the silencer
Air supply Check pressure on unit! Pressure high
enough? Check valve. A 3/2-way valve
is strictly required, so that the supply
line to the unit is ventilated.
Cover loose
A
leaking cover will cause standstill of
the vibrator Tighten the screws.
Line cross-sections too
small Observe minimum cross-sections, see specifications under „Installation“
Line between valve and
NTS too long
Causes slow starting and possible
standstill of piston in central position.
If necessary, install a pilot-controlled
3/2-way air valve in front of the vibrator
Exhaust air excessively
throttled Open the throttle further. Check silencer (sufficient air flow?).
Grommet has too long
thread This may deform the housing (if this has already happened, return the unit
to Netter GmbH!).
Spanning due to
installation Check whether the contact surface is even.
Rattling Screws loose Check the fastening screws
Power drop No lubrication Check function of lubricator if
lubricated compressed air is specified.
Unit soiled Dismantle, remove dirt film.
Wear Check unit and piston for visible wear
(if wear is found return the unit to
Netter GmbH!). See also note in
chapter 10 „Spare parts“.
Design: Check size of unit. Has the size been
chosen correctly?
Pressure too low Check the pressure at the inlet of the
unit (!) during operation. If necessary
increase the pressure. Line cross-
sections OK?
10 Spare Parts
When ordering spare parts please give the following details:
1. Type of unit
2. Description of spare part
3. Required quantity
Please note: Piston and housing are matched to each other and can
only be delivered together.
In order to assure compliance with the technical performance data
synchronously operated vibrators should always be replaced together. If this
is neglected, the new vibrator will adapt its power to the weaker vibrator.

16
11 Appendix
11.1 Accessories
The following accessories are available for linear vibrators of type NTS (on request):
Description Remark
Hose material and
fittings For supply and discharge of compressed air or nitrogen in various qualities and dimensions.
3/2-way valves For electric, pneumatic and manual control
Throttle valves For amplitude control, manually adjustable or
pneumatically controllable (for remote control)
Service units Filter, regulator, lubricator or filter + regulator (for non-
lubricated NTS)
Duty/pause controls Electric or pneumatic for interval operation
Brackets For quick removal of vibrators on containers
Large silencers For combined exhaust air discharge (for group 2)
Special designs: For extreme temperature ranges, for non-lubricated
operation, in stainless steel version, with technical data as
required and many more. Further information on request.
11.2 Disposal
Depending on the material, the parts must be disposed of according to official
regulations.
Material specifications:
All parts of these vibrators are suitable for recycling
•Black coated housing: ⇒Aluminium
•Cover: ⇒Plastic (POM)
•Piston: ⇒Steel
•Screws: ⇒Stainless steel
•Orange painted housing: ⇒Grey cast iron
•Piston and screws for cast iron housing: ⇒Steel
Special units (also non-lubricated units for other temperatures):
Material on request (e.g. stainless steel, bronze etc.)
All units can be disposed of through Netter GmbH.
The current disposal prices are available on request.
11.3 Enclosures
Enclosure(s):
Declaration of
manufacturer
Further information available on request:
Leaflet No. 25 (NTS), control plans for automatic
starting of units of group 2 with horizontal
installation, starting controls for starting with
reduced pressure, recommendations for the
construction of discharge troughs with NTS
vibrators etc.