NetterVibration NTP Series User manual

Operating instructions for
Netter pneumatic linear vibrators
of the series NTP
April 2020
No. 1391E
Page 1/19
These operating instructions apply to:
NTP 18
NTP 25
NTP 32
NTP 48

2
Contents
1General information 3
2Safety 5
3Technical data 7
4Design and function 10
5Transport and storage 11
6Installation 12
7Start-up and operation 14
8Maintenance and servicing 15
9Troubleshooting 16
10 Spare parts and accessories 17
11 Disposal 18
12 Annex 19
Please refer to the delivery note for the scope of delivery.
Check the packaging for possible transport damage. In the event of
damage to the packaging, check the contents for completeness and
possible damage. Inform the carrier in the case of damage.
The pneumatic linear vibrators of the series NTP are hereafter referred
to as "NTP".
Document no.
1391E
Version no.
2
Date of issue
April 2020
Scope of
delivery
Designation
Version of
document

General information
3
1 General information
Before installing the NTP read these instructions carefully. It is the basis
for any action when dealing with the NTP, and may be used for training
purposes. The instructions should be subsequently stored at the operation
site.
The target group for these instructions is technical staff, who have basic
knowledge in pneumatics and mechanics.
Only complying technical staff may work on the NTP.
The NTP may only be installed, put into operation, maintained, troubleshot
and disassembled by persons authorised by the operator.
This documentation is protected by copyright.
Netter Vibration reserves all rights such as translations, reprinting and re-
production of the instructions, as well as parts thereof.
All technical information, data and instructions for installation, operation
and maintenance in these instructions are based on the latest information
available at the time of printing and take our past experience to the best of
our knowledge into account.
No claims can be derived from the information, illustrations and descrip-
tions in these operating instructions.
The manufacturer does not assume liability for damages resulting from:
•failure to observe the instructions,
•improper use,
•unauthorised repairs,
•technical modifications,
•use of non-permissible spare parts.
Translations are made to the best of our knowledge.
Netter Vibration does not assume liability for translation errors, even if the
translation was made by us or on our behalf. Only the original German text
remains binding.
The pneumatic linear vibrators of the series NTP comply with the EC Ma-
chinery Directive 2006/42/EC.
In particular, the standard EN ISO 12100 has been observed.
Use and
storage
Target group
Copyright
Limitation of
liability
Directives /
standards
observed

General information
4
The following instruction and warning symbols are used in these instruc-
tions:
DANGER
signifies an immediate danger.
Disregard of this notice will result in death or severe bodily
injuries.
WARNING
signifies a potential danger.
Disregard of this notice can result in death or severe bodily
injuries.
CAUTION
signifies a potentially dangerous situation.
Disregard of this notice can result in minor or moderate
bodily injuries.
NOTICE
signifies potential material damage.
Disregard of this notice can result in material damage.
IMPORTANT
indicates actions, methods or notes that are not relative to safety, e.g. use-
ful information and tips.
Environmentally safe disposal
indicates the obligation of environmentally safe disposal.
Instruction
and warning
symbols
Personal
injuries
Material
damages
Notes

Safety
5
2 Safety The NTP are intended for installation in machines.
General applications are: loosening, conveying, compacting, separating
bulk materials and reducing friction. NTP are used for emptying bunkers
and as drives for sieves and vibration tables.
The NTP may also be operated in dusty and wet environment, but not in
water or in other liquids.
The NTP B+C may only be operated clocked.
Any other use is considered improper.
Installation, commissioning, maintenance and troubleshooting of the NTP
may only be performed by authorised qualified personnel.
All handling of the NTP is the responsibility of the operator.
WARNING
Falling parts
The NTP, construction parts as well as fastening screws can
come loose due to vibration. Falling parts lead to severe
personal injuries.
➢Check the fastening screws after one hour of operation
and thereafter at regular intervals (generally monthly).
➢Retighten the fastening screws, if necessary.
➢A safety device with a safety cable is mandatory for criti-
cal mounting situations.
WARNING
Compressed air
A loosened hose which is under pressure can lead to personal injuries.
➢Screw the hose lines on carefully.
➢Check the hose lines and connections after one hour of operation and
thereafter regularly (generally monthly).
➢Retighten the hose lines, if necessary.
➢Ensure that the compressed air is disconnected from the supply lines
during all work on the NTP.
➢Prevent the NTP from being switched back on during all work.
Intended use
Qualification
of qualified
personnel
Falling parts
Compressed
air

Safety
6
WARNING
Sound level
Near the NTP or in the vicinity of the constructions connect-
ed with the NTP, the sound pressure level may exceed
80 dB(A). The human ear can be permanently damaged by
the high sound level.
➢When working in the noise area, use ear protection if
80 dB(A) is exceeded.
Sound level

Technical data
7
3 Technical data
Drive
medium
NTP must be operated with clean, lubricated compressed air or lubricated
nitrogen according to the following specification:
ISO 8573-1
[ 5
:
6
:
4 ]
Filter ≤ 5 µm
Humidity,
Pressure dew point ≤ +10 °C
Total oil content
≤ 5 mg/m3
NTP L versions are suitable for operation with oil-free, dried com-
pressed air according to the following specification:
ISO 8573-1
[ 5
:
6
:
2 ]
Lubrication
ISO viscosity class according to DIN ISO 3448, VG 5 to 15
Fill the mist lubricator with acid- and resin-free compressed air oil.
Recommendation for tempera-
tures from 0 to 60 °C:
Klüber "AIRPRESS 15"
Specification for temperatures above
60 °C with HT designs:
Aral "Farolin"
Specification for temperatures
from 0 to -20 °C:
Klüber "ISOFLEX PDP 10"
Specification for temperatures
below -20 °C for NT versions:
"BREAK FREE®CLP"
Ambient
temperature*
Standard and NTP L versions: 5 °C to 60 °C
NT versions:
-32 °C to 60 °C
HT versions:
5 °C to 160 °C, depending on version
Operating
pressure*
2.0 to 6.0 bar
* Higher operating pressures and temperatures are only permitted after consultation with and the written con-
sent of application engineers from NetterVibration.
IMPORTANT
NTP B + C may only be operated clocked.
A duty time of max. 60 s must be followed by a pause of at least 60 s. Al-
ternatively, with a short duty time (≤ 12 s) a pause factor of 5 may be used
(e.g.: duty time 5 s - pause time 25 s).
The type designations of the NTP differ as follows:
NTP B
have no impact plate, the piston swings against an air cush-
ion.
NTP B+A
have an impact plate made of steel in the base plate (hard-
hitting with high noise level).
NTP B+C
have an impact plate (elastomer disc) that is inserted in the
base plate.
NTP B+C is the standard version.
Permissible
operating
conditions
Clocked
operation
Type
designation

Technical data
8
Type:
NTP ...
Unbalance
[cmkg]
Frequency
[min-1]
Centrifugal force
[N]
Air
consumption
[l/min]
Sound level*
[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
18 B
0.090
0.100
0.110
3,828
4,680
5,490
69
118
183
12
67
65
77
18 B+C
0.060
0.060
0.060
6,600
9,420
11,160
147
300
421
20
64
75
87
25 B
0.488
0.613
0.686
2,645
3,159
3,602
190
341
487
23
92
64
73
25 B+C
0.144
0.163
0.196
5,848
7,000
8,784
269
438
830
33
108
68
82
32 B
1.080
1.365
1.449
1,824
2,221
2,614
197
369
543
37
143
64
77
32 B+C
0.602
0.665
0.665
2,959
4,080
5,040
289
607
926
50
198
71
86
48 B
4.718
6.188
6.641
1,328
1,603
1,963
456
872
1,403
67
295
65
80
48 B+C
2.081
1.992
1.992
2,618
3,456
4,320
782
1,305
2,039
96
336
78
90
* at 1 m distance
The technical performance data changes over the service life (wear and
contamination).
The sound emitted by the NTP can be dampened by covers (on request).
This is only worthwhile if the impacted sheet metal is also insulated (e.g.
by heat insulation material).
NTP 18
NTP 25
NTP 32 / 48
Type:
NTP ...
A
[mm]
B
[mm]
C
[mm]
Ø D
[mm]
E
[mm]
F
[mm]
G
H
[mm]
K
[mm]
Ø L
[mm]
N
Weight
[kg]
18
60.2
53
43
5.2
21.5
12
M5
10.5
-
30
M5
0.16
25
90
60
46
6.5
36
14.5
G 1/8
15
8
51
G 1/8
0.61
32
140
75
51
11
48
32
G 1/4
20
10
70
G 1/4
1.47
48
194
100
78
13
60
51
G 3/8
25
15
95
G 3/8
3.95
Parameters
Service life
Sound level
reduction
Dimensions

Technical data
9
Netter Vibration recommends the following tightening torques for fastening
screws and nuts of the strength class 8.8 (sliding friction coefficient 0.14):
Type:
NTP ...
Thread
Tightening torque
[Nm]
Minimum screw
depth for tapped
hole
in S 235 JR *
[mm]
18
M5
6
8
25
M6
10
10
32
M10
50
17
48
M12
87
20
* Material S 235 JR = St 37-2, minimum screw depth for other materials on request
Netter Vibration recommends the following cross-sections for 3/2-way
valves and hoses:
Type:
NTP ...
Connection thread
Hose/valve size*
Exhaust air thread
18
M5
DN 4
M5
25
G 1/8
DN 4
G 1/8
32
G 1/4
DN 6
G 1/4
48
G 3/8
DN 9
G 3/8
* DN = nominal diameter (inner diameter)1
Tightening
torques
Valves / hoses

Design and function
10
4 Design and function
1
Cover
2
Housing screw
(cover)
3
Housing
4
Air inlet/
grommet
5
Piston
6
Air outlet/
silencer
7
Housing screw
(base plate)
8
Base plate
9
Impact plate
The vibrations are generated by a free-swinging differential pressure pis-
ton (5).
In the standard version NTP B+C the piston (5) strikes against an impact
plate (9) made of elastomer, thereby achieving a rubber hammer effect.
The version B has no impact plate, the piston (5) swings quietly against an
air cushion.
If the NTP is to produce hard strokes, then either insert an impact plate (9)
made of steel into the base plate (8) or completely remove the base plate.
The result is hard strokes on the surface on which the NTP is attached.
The NTP generate linear vibrations.
The momentum of the freely oscillating piston (= mass x distance) deter-
mines the amplitude.
The amplitude is set by throttling the exhaust air, the frequency is infinitely
variable via the operating pressure.
Design
Function

Transport and storage
11
5 Transport and storage
Special conditions of transport are not required.
The NTP are packed and ready for assembly. Accessories and add-on
parts are delivered unmounted, unless otherwise agreed upon.
The packaging protects the NTP from transport damage. The packaging
material has been selected from an environmentally safe and technically
disposable point of view and is therefore recyclable.
The return of packaging to the material cycle conserves raw materials and
reduces the amount of waste.
•Store the NTP in a dry and clean environment.
•Protect the NTP from UV-exposures, weather and ozone.
•The storage temperature is between -20 °C and +60 °C.
•Close all openings when re-storing.
•Preserve all NTP apart from the NTP L before storage:
1. Add anti-corrosion oil to the air inlet of the NTP.
2. Actuate the NTP briefly when mounted.
3. Then close the supply air connections of the NTP.
If the NTP L are stored for longer than 6 months, then the NTP L must be
checked by Netter Vibration before renewed start-up.
Transport
conditions
Packaging
Storage
conditions
Inspection of
the NTP L

Installation
12
6 Installation
Observe the safety instructions in Ch. Safety, from page 5 on.
For operation of the NTP a 3/2-way valve (minimal valve function) has to
be used,
•to ensure a faultless start in any installation position.
•in order to achieve an immediate standstill when switched off.
Use a maintenance unit for all installations.
The maintenance unit must consist of a filter, a regulator and a mist lubri-
cator (see Ch. Technical data, page 7; "Drive medium"), for NTP L of a
filter and a regulator.
Connect the NTP with a pneumatic hose according to the following pneu-
matic circuit diagram.
1
Maintenance unit
(NTP L: without mist lubricator)
2
3/2-way valve
Special circuit diagrams are available on request.
Information regarding tightening torques for screws as well as cross sec-
tions for valves and hoses can be found in Ch. Technical data, page 7.
Depending on the type of NTP, Netter Vibration supplies suitable fastening
sets for tapped holes (NBS G) and through-holes (NBS D) for secure and
permanent attachment of the NTP on the weld-on console.
When installing the NTP carry out the following steps in succession:
1. Notice: The NTP must lie completely on the surface so that there is
no tension in the housing when tightening the fastening screws, which
could cause mechanical damage. The mounting surface has to be flat
(±0.1 mm flatness) and clean with no paint residues or burn-ins.
Netter Vibration recommends mounting the NTP on a weld-on console
or a glueing console. Weld or glue the console onto the mounting sur-
face provided by the customer so that the vibration energy is optimally
distributed.
2. Mount the NTP on the console with the fastening screws. Observe the
recommended values for screw size and tightening torques.
3. If necessary, additionally use a medium-strength liquid safety agent to
secure the screw connections.
Operation with
3/2-way valve
Components
for all
installations
Standard
installation
Technical data
NBS fastening
kits
Procedure

Installation
13
4. Observe the recommended cross-sections for valves and hoses. For
the air supply, preferably use screw connections with integrated flat
seal or liquid sealant. Avoid using sealing tape.
Notice: Do not use longer screw threads than intended for the air
supply (e.g. no pipes with external thread). Otherwise, the housing
can become deformed and the piston thereby jam.
5. Fasten the compressed air supply securely.
6. Mount the silencer.
The loss of pressure increases with hose length. The nominal diameters in
Ch. Technical data, from page 7 on, apply to hose lengths up to 3 m.
Longer supply lines require larger cross-sections.
If necessary, the escaping air is diverted through a hose, which must be
installed as follows:
1. Remove the silencer.
2. Fasten the exhaust air hose directly to the exhaust air connection.
3. Mount the silencer at the free end of the exhaust hose.
If the NTP is to achieve full performance, then the exhaust hose must have
a larger nominal size than the supply hose.
Check that the following steps have been carried out:
Compliance with permissible ambient temperatures ensured?
NTP mounted on flat surface (±0.1 mm flatness)?
Securing of fastening screws (NBS) checked?
Screw size and tightening torques observed?
Maintenance unit (filter, regulator, mist lubricator; NTP L: filter,
regulator), valve and supply line mounted?
Compressed air supply line securely fastened?
Specifications on kind of hose, hose length and nominal width
observed?
Silencer mounted?
NTP secured against falling by means of a safety cable in criti-
cal assembly situations?
Air supply
Air discharge
line
Checklist
installation

Start-up and operation
14
7 Start-up and operation
Observe the safety instructions in Ch. Safety, from page 5 on.
Please refer to Ch. Technical data, page 7 for permissible operating condi-
tions.
The frequency of the NTP should be set or regulated with the pressure
regulator of the maintenance unit. Use a 3/2-way valve.
The frequency is reduced by lowering the air pressure before the NTP.
The centrifugal force is hereby also reduced. At the same time the ampli-
tude remains almost constant.
If required, install a throttle valve in the exhaust air line in order to regulate
the amplitude of the NTP by throttling the exhaust air.
Important: Reduced cross-sections already throttle (observe the nominal
diameter).
By throttling the exhaust air, the centrifugal force is reduced. The frequen-
cy hereby remains almost constant.
Important: Reduce the amplitude only up to approx. 50 %. This can cause
start-up problems if below.
Set the mist lubricator to the smallest safely adjustable number of drops
while the NTP is running. Notice: The NTP is ready for operation only af-
ter adjustment and correct functioning of the mist lubricator.
Netter Vibration recommends setting the following number of drops on the
mist lubricator depending on the type of NTP:
NTP ...
Number of drops
18, 25
1-2 drops/2 min
32
1-2 drops/min
48
2 drops/min
Check that the following steps have been carried out:
Screw connections checked before start-up?
Desired frequency set on pressure regulator?
Desired amplitude set by throttling the exhaust air?
Mist lubricator set?
After one hour of operation:
Hose supply connections as well as fastening screws checked,
retightened, if necessary?
Then follow the maintenance plan.
Permissible
operating
conditions
Regulation of
frequency
Regulation of
amplitude
Setting mist
lubricator
Recommend-
ed number of
drops
Checklist
start-up

Maintenance and servicing
15
8 Maintenance and servicing
Observe the safety instructions in Ch. Safety, from page 5 on.
If necessary clean the surface of the NTP with a moist cloth to remove
dust deposits.
To clean the NTP with pressurised water, proceed as follows:
1. Close the supply air and exhaust air openings.
2. Clean the NTP externally with pressurised water.
3. Activate the NTP briefly.
Maintenance of the NTP must be carried out as follows:
Interval
Action
After one hour of opera-
tion after initial commis-
sioning
Check fastening screws.*
Check hose screw connections and hose fittings, retighten if
necessary.
Monthly
Check fastening screws.*
Check hose screw connections and hose fittings, retighten if
necessary.
Check hose supply connections for permeability and kinks. If
necessary, clean and remove kinks.
Check the function of the silencer. Clean silencer.
Check the function of the NTP.
Check the function of the mist lubricator (Content decreases?
Number of drops/min?). Refill oil (except for the NTP L).
Empty the filter of the maintenance unit, if necessary, clean
the filter insert (wash out) and replace, if necessary.
* Observe the recommended tightening torques (see Ch. Technical data, from page 7 on).
The maintenance intervals depend essentially on the service life and how
clean the drive medium is.
Unfiltered compressed air leads to high wear, silencer clogging or com-
plete failure of the NTP.
If you notice loss of performance or standstill of the NTP then have the
NTP checked at Netter Vibration.
Cleaning
Maintenance
plan
Maintenance
intervals
Loss of per-
formance

Troubleshooting
16
9 Troubleshooting
In the case of malfunctions of the NTP proceed as follows:
Malfunction
Possible cause
Corrective action
No start
Silencer polluted
Clean silencer.
Compressed air
supply
Check if there is enough pressure at the NTP.
Check valve. A 3/2-way valve is strictly required, so
that the supply line to the NTP is vented.
Cover loose
A leaky cover leads to standstill of the NTP.
Tighten screws.
Line cross-sections
Observe recommended cross-sections (see Ch.
Technical data, from page 7 on).
Line too long be-
tween valve and
NTP
Leads to a slow start and an eventual standstill of
the piston in the middle position.
If necessary, put a controlled 3/2-way air valve be-
fore the NTP.
Exhaust air throt-
tled too much
Open the throttle valve further. Clean silencer.
Thread of grommet
is too long
Check if the housing is deformed.
In case of deformed housing, have the NTP
checked by Netter Vibration.
Tension during
installation
Ensure a flat contact surface.
Temperature below
5 °C
Use NT-Version or heat the environment.
No 3/2-way valve
or wrong cross
section
Use a 3/2-way valve with adequate cross section.
Rattling
Screws loose
Check fastening screws.
Power loss
Lubrication is miss-
ing
Check the function of the mist lubricator.
NTP polluted
Disassemble NTP and clean it.
Wear
Check piston and housing for visible wear. If wear is
found, send the NTP to Netter Vibration or replace
the NTP.
Check the function of the mist lubricator.
Operating pressure
too low
Check the pressure at the inlet of the NTP during
operation. If necessary, increase the pressure.
Check line cross-sections.
Malfunctions
and causes

Spare parts and accessories
17
10 Spare parts and accessories
Please provide the following details when ordering spare parts:
•required amount
•description and position of spare part
•type of NTP
IMPORTANT
Please observe: Piston and housing are produced pairwise and can only
be delivered together.
The following accessories are available for the NTP:
Component
Description
Hose material and
hose screw connections
For air supply or discharge, available in various qualities
and dimensions
3/2-way valves
For electrical, pneumatic or manual activation
Throttle check valves
For amplitude regulation, manually adjustable or pneu-
matically controllable (for remote control)
Maintenance units
Filter, regulator and mist lubricator
Netter Electronic Timers
Electric or pneumatic, for interval operation
Brackets
For quick relocation on containers, etc.
NBS fastening kit
Recommended for safe and permanent attachment of
the NTP
Following accessories are available:
•NTP L for oil-free operation,
•NTP for ATEX area,
•high temperature (HT) and low temperature (NT) versions,
•versions with bronze piston (BK),
•stainless steel versions (NTP S) for use in aggressive atmospheres.
Ordering of
spare parts
Delivery pair-
wise
Possible
accessories
Special mod-
els

Disposal
18
11 Disposal
All parts of the NTP must be properly disposed of according to
the material specifications. The valid disposal prices of the
NTP are available on request.
All parts of the NTP can be recycled.
Material
Part
Aluminium
Housing, cover, base plate
Steel or stainless steel
Piston, impact plate (for NTP B+A), screws
Plastics
Silencer, grommet, sealings, impact plate (for NTP B+C)
Stainless steel (for NTP S)
Housing, cover, base plate
Bronze (for NTP BK)
Piston
Prices
Material
specifications

Annex
19
12 Annex
Declaration of Incorporation