NetterVibration NTK 8 AL Pneumatic Linear Vibrators Instruction Manual

NetterVibration NTK 8 AL Pneumatic Linear Vibrators Instruction Manual

Scope of delivery

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.

Designation

The pneumatic linear vibrators of the series NTK are hereafter referred to as “NTK”

Version of document

Document no. 1977E
Version no. 1
Date of issue Feb. 2021

General information

Use and storage

Before installing the NTK read these instructions carefully. It is the basis for any action when dealing with the NTK, and may be used for training purposes. The instructions should be subsequently stored at the operation site

Target group

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 NTK.
The NTK may only be installed, put into operation, maintained, troubleshot and disassembled by persons authorised by the operator.

Copyright

This documentation is protected by copyright.
NetterVibration reserves all rights such as translations, reprinting and reproduction of the instructions, as well as parts thereof.

Limitation of liability

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 descriptions 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.
NetterVibration 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.

Model designations

• NTK AL: models with aluminium housing
• NTK S: models with stainless steel housing
• NTK X: models with plastic housing
• NTK HT: models for high ambient temperatures
• NTK NT: models for low ambient temperatures
• NTK L: models for oil-free operation
• NTK NF: low frequency models
• NTK HF: high frequency models

Directives / standards observed

The pneumatic linear vibrators of the series NTK comply with the EC Machinery Directive 2006/42/EC. In particular, the standard EN ISO 12100 has been observed.

Instruction and warning symbols

The following instruction and warning symbols are used in these instructions:

Personal injuries

DANGER
indicates an immediate danger.
Disregard of this notice will result in death or severe personal injuries.

WARNING
indicates a potential danger.
Disregard of this notice can result in death or severe personal injuries.

CAUTION
indicates a potentially dangerous situation.
Disregard of this notice can result in minor or moderate personal injuries.

Material damages

NOTICE
indicates potential material damage.
Disregard of this notice can result in material damage

Notes

IMPORTANT
indicates actions, methods or notes that are not relative to safety, e.g. useful information and tips.

Environmentally safe disposal
indicates the obligation of environmentally safe disposal.

Safety

Intended use

The NTK are intended for generating linear vibrations.
General applications are: loosening, conveying, sorting, compacting, separating bulk materials and reducing friction. NTK are used for emptying bunkers, as drives for conveyor troughs, sieves and vibrating tables.
The NTK are designed for installation in machines and may only be put into operation, if it has been assured that the complete machine complies with the regulations of the machinery directive.
The NTK may also be used outdoors and in dusty and humid environments. The NTK may not be submerged in bulk materials or in liquids.
Any other use is considered improper.

Qualification of qualified personnel

Installation, commissioning, maintenance and troubleshooting of the NTK may only be performed by authorised qualified personnel.
All handling of the NTK is the responsibility of the operator.

Falling parts

WARNING

Falling parts
The NTK, construction parts as well as fastening screws can come loose due to vibration. Falling parts lead to severe personal injuries.

• For mounting the NTK use only suitable fastening screws.
• Use only self-locking washers, self-locking nuts or suitable screw safety agent to secure the NTK.
• Check the fastening screws after one hour of operation and thereafter at regular intervals (generally monthly).
• If necessary, tighten the fastening screws with a torque wrench.
• Appropriate safety measures are compulsory for critical installation situations

Compressed air

A loosened hose which is under pressure can lead to personal injuries.

WARNING

• 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 NTK.
• Prevent the NTK from being switched back on during all work.

Moving parts

NTK have moving parts which can cause injury.

WARNING

• The direct contact of a vibrating part must be prevented on site by constructive measures, eg. by a screen.

Silencer

NOTICE
Operation of the NTK with silencers is mandatory.
Silencers reduce the noise level and protect the NTK from contamination entering.

Dust protection

NOTICE
NTK may not be operated in a dusty environment without dust protection.

Technical data

Permissible operating conditions

Drive medium| NTK must be operated with clean, lubricated compressed air or lubri- cated nitrogen according to the following specification (according to ISO 8573-1 ):NTK L-versions are suitable for operation with oil-free compressed air according to the following specification (according to ISO 8573-1 ):
---|---
| [ 5 :| 6 :| 2 ]|
Lubrication| ISO viscosity class according to DIN ISO 3448, VG 5 to 15Fill the mist lubricator with acid- and resin-free compressed air oil. The use of a mist lubricator is mandatory:·

• for the models NTK16, NTK 25, NTK 40, NTK 55, NTK 85, NTK 110,·
• when using additional oscillating weights,·
• if NTK is used as an impactor,·
• when using dried compressed air,·
• in aggressive ambient conditions.

A mist lubricator is recommended by Netter Vibration for all NTK vibra- tors (except NTK L).

Recommendation for tempera- tures from 0 °C to 60 °C:Klüber “AIRPRESS 15”| Specification for temperatures 0 °C to -20 °C:Klüber “ISOFLEX PDP 10”
Specification for temperatures below -20 °C with NT versions:BREAK FREE® CLP| Specification for temperatures above 60 °C with HT versions:Aral „Farolin“
Ambient temperatur| NTK with AL-housing (black)| 5 °C to 60 °C
NTK 15 X with plastic housing| 5 °C to 100 °C
NTK with steel or stainless steel housing| -10 °C to 150 °C
NT versions| to -32 °C
HT versions| up to 200 °C
Operating pressure| 2,0 to 6,0 bar
Ambient conditions| When operated oil-free or in dusty environment, NTK vibrators must not be used without bellows or other dust protection.

Higher operating pressures and temperatures are only permitted after consultation with and the written consent of application engineers from NetterVibration.

Freely swinging part

The following table distinguishes between three versions:

The piston swings freely.
The housing is screwed to the mass to be vibrated

1. Housing
2. Piston
3. Additional oscillating weight

The piston with an additional oscillating weight swings freely.
The housing is screwed to the mass to be vibrated. S3

The housing swings freely.
The piston is screwed to the mass to be vibrated.

For types of NTK, where the weight of the piston and the housing are only slightly different, S1 and S2 are indicated, otherwise S1 and S3. The name of the additional oscillating weight used is given in brackets (K+SM 8-2 stands for “piston plus additional oscillating weight SM 8-2”).

Parameters

Type NTK / Freely oscillating part| **Oscillating weight* [kg]| Air consumption [l/min]| Frequency ****[min -1]| Centrifugal force [N]| Unbalance ****[cmkg]
---|---|---|---|---|---
2 bar| 6 bar| 2 bar| 6 bar| 2 bar| 6 bar| 2 bar| 6 bar**
8 AL| S1| 0.030| 7| 32| 2,440| 3,657| 15| 44| 0.05| 0.06
(K+SM 8-2)| S2| 0.088| 6| 25| 1,380| 2,080| 15| 50| 0.15| 0.37
15 X| S1| 0.135| 17| 72| 1,745| 2,544| 49| 104| 0.29| 0.33
(K+SM 16-2)| S2| 0.675| 14| 54| 758| 1,152| 53| 123| 1.69| 1.95
16| S1| 0.150| 14| 58| 1,680| 2,400| 42| 106| 0.27| 0.34
16| S3| 1.330| 8| 39| 600| 923| 96| 210| 4.90| 4.50
18 AL , 18 AL M1| S1| 0.210| 19| 68| 1,600| 2,350| 41| 109| 0.29| 0.36
(K+SM 16-1)| S2| 0.530| 13| 58| 972| 1,572| 61| 191| 1.18| 1.41
25 AL| S1| 0.420| 34| 149| 1,289| 1,986| 107| 269| 1.18| 1.24
(K+SM 25-3)| S2| 1.655| 22| 115| 686| 1,080| 177| 419| 6.88| 6.55
25| S1| 0.470| 38| 156| 1,440| 2,270| 127| 374| 1.12| 1.32
25| S3| 2.600| 24| 102| 690| 1,067| 237| 612| 9.10| 9.82
28 AL| S1| 0.590| 38| 135| 1,488| 1,818| 255| 381| 2.10| 2.10
(K+SM 16-2)| S2| 1.130| 30| 136| 1,110| 1,488| 240| 423| 3.55| 3.48
40 AL| S1| 1.240| 54| 220| 1,231| 2,094| 239| 519| 2.88| 2.16
(K+SM 25-3)| S2| 2.475| 36| 210| 900| 1,389| 298| 787| 6.72| 7.44
40| S1| 1.270| 49| 228| 1,200| 1,930| 282| 503| 3.57| 2.46
40| S3| 4.200| 34| 161| 600| 1,108| 385| 1,100| 19.48| 16.36
55 AL| S1| 2.100| 98| 398| 1,500| 2,400| 447| 839| 3.62| 2.66
(K+SM 85-1)| S2| 3.430| 83| 384| 1,113| 1,768| 492| 1,077| 7.25| 6.28
55 NF| S1| 2.100| 101| 408| 1,405| 2,351| 441| 872| 4.08| 2.88
55 NF| S3| 5.900| 64| 330| 884| 1,467| 617| 1,588| 14.40| 13.47
85 NF| S1| 5.200| 166| 545| 1,892| 2,830| 767| 2,215| 3.91| 5.04
85 NF| S3| 12.100| 148| 532| 1,200| 1,838| 1,073| 2,428| 13.59| 13.11
110| S1| 8.000| 210| 652| 2,133| 3,040| 1,505| 3,986| 6.03| 7.87
110| S3| 16.600| 207| 634| 1,447| 2,133| 1,548| 3,974| 13.48| 15.93

• all specified weights incl. fastening screw of additional oscillating weight
  These data are comparative values and can vary depending on the application. Further data on request.

Unbalance

By changing the weight of the freely oscillating part (e.g. by attaching an additional oscillating weight to the piston or housing), the oscillation bandwidth and the unbalance change. This means that by selecting the freely oscillating part, the unbalance can be preselected.

Sound level

The sound pressure level is 64 – 79 dB (A) at an air pressure of 6 bar, depending on the type (with silencer), and lower at a lower air pressure.

Service life

The technical performance data changes over the service life (wear and contamination).

Dimensions for AL except 18

Type NTK| ØA| B| C| D| E| F| G +| H| J| ØK| L| M| R| S| T| U| SW
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
8 AL| 8| 17| 91| 22| 5| 32| 18.5| M 5| M 6| –| M 5| M 5| 15| 7| 47| 76.5| 7
25 AL| 25| 50| 138| 54| 7| 52| 29.5| M 16| M 16| –| G 1/4| G 1/4| 25| 18| 72| 120.5| 22
28 AL| 28.5| 50| 160| 54| 15| 53| 31.5| M 10| M 16| –| G 1/4| G 1/4| 20| 22| 94| 143| 24
40 AL| 40| 73| 140| 79| 12| 57| 34.5| M 16| M 16| 8| G 3/8| G 1/4| 25| 20| 73| 122.5| 32
55 AL| 55| 98| 133| 109| 20| 58| 38.5| M 20| M 20| 10| G 3/8| G 3/8| 40| 35| 66| 115| 46

all information in [mm] except J, L and M
+central oscillation position

Dimensions for other types

Typ NTK| ØA| B| C| E| F| G +| HK / HD| J| ØK| L | M **| **Q | R| S| T| U| SW
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
15 X| 15| 50| 114| 9| 38| 23.5| M 10| –| –| G 1/8| G 1/8| –| 20| 10| 55| 99| 13
16| 16| 49| 111| 5| 38| 21.5| M 10| –| –| G 1/8| G 1/8| –| 21| 10| 57| 96| 14
18 AL| 18| 49| 116| 8| 42| 25.0| M 10| –| –| G 1/8| G 1/8| –| 21| 10| 62| 101| 16
18 AL M1| 18| 49| 116| 8| 42| 25.0| M 10 / M12| –| –| G 1/8| G 1/8| –| 21| 10| 62| 101| 16
25| 25| 64| 138| 9| 52| 30.5| M 16| –| –| G 1/4| G 1/4| –| 25| 10| 73| 125| 22
40| 40| 84| 140| 12| 54| 33.0| M 16| –| –| G 3/8| G 1/4| –| 40| 15| 73| 123| 32
55 NF| 55| 110| 125| 17| 50| 35.0| M 20| 96| | G 3/8| G 3/8| 8.5| 40| 30| 60| 108| 46
55 HF| 55| 110| 115| 27| 50| 40.5| M 20| 96| | G 3/8| G 3/8| 8.5| 40| 30| 50| 98| 46
85 NF| 85| 160| 122| 20| 50| 32.5| M 20| 143| 12.8| G 3/8| G 3/8| 10.5| 40| 20| 57| 105| –
85 HF| 85| 160| 112| 30| 55| 42.5| M 20| 143| 12.8| G 3/8| G 3/8| 10.5| 40| 20| 47| 95| –
110| 110| 200| 122| 22| 55| 38.5| M 20| 182| 12.8| G 1/2| G 3/8| 12.5| 40| 25| 57| 105| –

all information in [mm] except H, L and M
+central position of vibration

• from NTK 85 E on: 2 connections (L1 and L2)
  ** for NTK 110 E: 2 connections (M1 and M2)
  *** additional mounting holes (amount n): for NTK 55 E n=4, for NTK 85 E n=6, for NTK110 E n=8

Tightening torques

NetterVibration recommends the following tightening torques for fastening screws and nuts of the strength class 8.8 (sliding friction coefficient 0.14):

• when using the entire thread length

Valves / hoses

NetterVibration recommends the following cross-sections for 3/2-way valves and hoses:

Type: NTK| Connection thread| **Hose/valve size *| Exhaust air thread**
---|---|---|---
8 AL| M 5| DN 4| M 5 or G 1/8
15 X| G 1/8| DN 4| G 1/8
16| G 1/8| DN 6| G 1/8
18 AL, 18 AL M1| G 1/8| DN 6| G 1/8
25, 25 AL, 28 AL| G 1/4| DN 6| G 1/4
40, 40 AL| G 1/4| DN 6 – 9| G 1/4
55, 55 AL| G 3/8| DN 9 – 12| G 3/8 – G1/2
85, 110| G 3/8| DN 12| G 1/2

• DN = nominal diameter (inner diameter)

Design and function

Design

1. Cover
2. Housing
3. Air inlet/grommet
4. Air outlet/silencer
5. Piston
6. Additional oscillating weight (optional)
   A Chamber A
   B Chamber B

Function

The NTK generate linear vibrations.
The vibration is generated by a freely oscillating, self-reversing piston.
Both weights, the piston (5) with an additional oscillating weight (6) on the one hand, the housing (2) and the weight to which it is attached on the other, oscillate in relation to their total weights against each other. If the vibration amplitude of the weight to be vibrated should be higher, then a larger additional oscillating weight (6) is simply screwed to the piston (5).
To keep the weight to be vibrated low, the piston can be connected to it (in the case of steel housings), in which case the housing (2) oscillates freely, if necessary with an additional oscillating weight.
The compressed air enters chamber A via the air inlet (3). The piston is pressed by the air in the direction of the cover (1). When the piston exceeds a defined position, then compressed air reaches chamber B via control bores in the piston. As the piston surface of chamber B is greater than that of chamber A, the piston is pressed in the opposite direction.
When another control bore reaches the air outlet (4), then chamber B is vented and the process begins again.
As the piston always reverses again before the end stop, the exhaust air only produces a slight noise, which is minimized by a silencer (4).

Transport and storage

Transport conditions

Special conditions of transport are not required.

Use suitable lifting equipment to move the NTK 85 E and the NTK 110 E.

A transport lug can be screwed into the piston or into the housing (M 20 thread) when lifting.

Note:The piston moves out of the housing when lifted and into the housing when lowered.

Be careful when lifting and lowering

Packaging

The NTK are packed and ready for assembly. Accessories and add-on parts are delivered unmounted, unless otherwise agreed upon.
The packaging protects the NTK 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.

Storage conditions

• Store the NTK in a dry and clean environment.
• Protect the NTK from UV-exposures, weather and ozone.
• The storage temperature is between -20 °C and +60 °C.
• Close all openings when re-storing.
• Preserve the NTK with steel housing before storing:

1. Put anti-corrosion oil into the air in- and outlet of the NTK.
2. Pull the piston of the NTK in and out while turning it several times.
3. Close the air supply connections of the NTK.

Installation

Observe the safety instructions in chap. Safety, from page 5 on.

Standard installation

1. Maintenance unit
2. 3/2-way valve
3. Additional weight (optional)
4. NTK

Special circuit diagrams are available on request.

Technical data

Information regarding tightening torques for screws as well as cross sections for valves and hoses can be found in Ch. Technical data, page 7.

Procedure

When installing the NTK, carry out the following steps in succession:

1. Notice: The NTK must rest fully so that no tension in the housing occurs when tightening the fastening screw, which could cause mechanical damage. Mount the NTK with the central fastening screw and a suitable lock washer on a clean and even surface (±0,1 mm flatness) without any paint residues or burn-ins.
   Depending on the intended use, NTK can be screwed on either with the housing or with the piston.
   Types from size NTK 55 E up have additional mounting holes (4) in the housing.
   If necessary, use all additional mounting holes and the corresponding number of lock washers to additionally secure the housing to the mass to be vibrated.
   
   4 Mounting hole

2. Observe the recommended values for screw sizes and tightening torques.

3. In addition, use a medium-strength liquid safety agent to secure the screw connections.

4. Observe the recommended cross-sections for valves and hoses. For the air supply, preferably use screw connections with integrated seals or liquid sealant. Notice: Do not use sealing tape for the screw connections. Do not use longer screw threads for the air supply than intended (e.g. no pipes with external thread). Otherwise, the housing may become deformed and the piston may jam.

5. Fasten the compressed air supply securely.

6. Mount the silencer/silencers.

Air supply

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.

Air discharge line

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 NTK is to achieve full performance, then the exhaust hose must have a larger nominal size than the supply hose.

Fitting the bellows

Notice: In dusty environment or with oil-free operation the NTK must be operated with bellows or other suitable dust protection.
How to assemble the optional Netter bellows NFB:

1. Clean (degrease) the contact surfaces on the NTK and on the additional oscillating weight.
2. Remove the protective foil from an adhesive surface on the bellows.
3. Slide the bellows over the piston and glue the bellows to the body of the NTK.
4. Hold the piston by the wrench flats with a wrench. Attach the additional oscillating weight to the piston with a screw with a medium-strength screw locking agent. If no additional oscillating weight is used with freely oscillating piston, a sheet metal disk with the diameter of the vibrator housing must be screwed onto the piston.
5. Remove the protective film from the free adhesive surface of the bellows and press the adhesive surface onto the additional oscillating weight or the sheet metal disc.

With the easy-to-release Velcro fasteners on the bellows, the wrench flats on the piston remain accessible.

Supported vibration mass

For inclined or horizontal mounting of the NTK, the vibration mass of the freely oscillating part S1, S2 or S3 (see section Parameters, page 9) may only exceed the following value if the vibration mass is supported by a spring:

Using as impactor

Using the NTK as impactor is possible.
A prior consultation with NetterVibration is recommended.

The piston must strike against a surface standing vertically to the NTK.
For this application lubricated compressed air is mandatory.

Provide shielding

Warning: NTK have moving parts which can cause injuries. Direct contact with an oscillating part must be prevented on site by structural measures, for example by shielding.
For the NTK 8 AL type a cover sleeve can be supplied.

Checklist installation

Check that the following steps have been carried out:

Compliance with permissible ambient temperatures ensured?

Central fastening screw with suitable lock washer installed?

Screw size and tightening torques observed?

Additional medium-strength liquid safety agent for securing the screw connections used?

Maintenance unit (filter, regulator, mist lubricator*), valve and supply line installed?

• not applicable for NTK L-models

When operated in a dusty environment or with oil-free operation: bellows/dust protection mounted?

If there is a risk of clamping: shielding mounted?

Compressed air supply safely fastened?

Details on hose length and nominal width observed?

Silencer mounted?
NTK secured against falling by means of a safety cable in critical assembly situations?

For inclined or horizontal mounting:
Maximum permissible vibration mass of the freely oscillating part complied with or vibration mass supported?

Start-up and operation

Observe the safety instructions in chap. Safety, from page 5 on.

Permissible operating conditions

Please refer to chap. Technical data, page 7 for permissible operating conditions.

Setting the frequency

The frequency of the NTK should be set with the pressure regulator of the maintenance unit.
The frequency is reduced by lowering the air pressure before the NTK.
The centrifugal force is hereby also reduced. At the same time the amplitude remains almost constant.

Adjustment of amplitude

If required, install a throttle valve in the exhaust air line in order to adjust the amplitude of the NTK by throttling the exhaust air. By throttling the exhaust air, the centrifugal force is reduced. The frequency hereby remains almost constant.
Important: Reduced cross-sections already throttle (observe the nominal diameter).
Reduce the amplitude only up to approx. 50 %. This can cause start-up problems if below.

Influence of vibrating mass

Depending on the vibration mass attached to the piston, the amplitude and frequency change.
A smaller vibration mass increases the frequency and reduces the amplitude. A larger vibration mass increases the amplitude and reduces the frequency.

Setting mist lubricator

Set the mist lubricator to the smallest safely adjustable number of drops while the NTK is running. Notice: The NTK is ready for operation only after adjustment and correct functioning of the mist lubricator.

Recommended number of drops

NetterVibration recommends setting the following number of drops, depending on the type of NTK, on the mist lubricators:

Checklist start-up

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.

Maintenance and servicing

Observe the safety instructions in chap. Safety, from page 5 on.

Cleaning

If necessary clean the surface of the NTK with a moist cloth to remove dust deposits.

To clean the NTK with pressurised water, proceed as follows:

1. Close the supply air and exhaust air openings.
2. Clean the NTK externally with pressurised water.
3. Activate the NTK briefly.

Maintenance plan

Maintenance of the NTK must be carried out as follows:

screws.
Check hose screw connections and hose fittings, retighten if necessary.
Weekly to monthly| Ensure that mist lubricator operates according to regulations. Refill oil if necessary (except for the NTK L).
Clean the filter of the maintenance unit and replace, if neces- sary.
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 NTK.

• Observe the recommended tightening torques (see Ch. Technical data, from page 7 on).

Maintenance intervals

The maintenance intervals depend essentially on the operating conditions, the service life and how clean the drive medium is.
Unfiltered compressed air leads to high wear, clogging of the silencer or complete breakdown of the NTK.

Loss of performance/ complete cleaning

Depending on the operating conditions, increased abrasion can form a deposit which impairs the performance.
If you notice loss of performance or standstill of the NTK clean the NTK completely and replace the sealing rings if necessary.
For complete cleaning of the NTK it is necessary to remove the piston.
The deposit must be removed from the inside of the housing and the piston with an oiled cloth.

Implementation by Netter

Maintenance, repair and general overhaul of the NTK may alternatively be performed by NetterVibration.

Troubleshooting

Malfunctions and causes

In the case of malfunctions of the NTK proceed as follows:

valve. A 3/2-way valve is strictly required, so that the supply line to the NTK is vented.
Cover loose| A leaky cover leads to standstill of the NTK. Tighten screws.
Line cross- sections| Observe recommended cross-sections (see Ch. Technical data, from page 7 on).
Line too long between valve and NTK| 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 before the NTK.
Exhaust air throt- tled too much| Open the throttle valve further. Clean silencer.
Thread of grom- met is too long| Check if the housing is deformed.In case of deformed housing, have the NTK 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 missing| Check the function of the mist lubricator.
NTK polluted| Disassemble NTK and clean it.
Wear| Check piston and housing for visible wear (deposit on piston and inside housing). If wear is found clean the NTK completely (see page 21 “…/complete clean- ing”).Alternatively send the NTK to Netter Vibration or re- place it.Check the function of the mist lubricator.
Operating pres- sure too low| Check the pressure at the inlet of the NTK during operation. If necessary, increase the pressure. Check line cross- sections.

Spare parts and accessories

Spare parts

There are no spare parts available for the NTK. If necessary, have the NTK checked by NetterVibration

Possible accessories

The following accessories are available for the NTK:

available in various qualities and dimensions
3/2-way valves| For electrical, pneumatic or manual activation
Throttle valves| For amplitude regulation, manually adjustable or pneu- matically controllable
Maintenance units| Filter, regulator and mist lubricator
Netter Electronic Timers| Electric or pneumatic, for interval operation
Fixing devices| For temporary or permanent fixing

Special models

Following accessories are available:

• NTK L for oil-free operation,
• NTK E for ATEX area,
• high temperature (HT) and low temperature (NT) versions,
• versions with plastic housing (NTK X),
• versions with bronze piston (NTK BK),
• versions for side mounting (NTK K and NTK KV),
• version with piston anti-rotation lock (NTK 25 AL K),
• stainless steel versions (NTK S) for use in aggressive atmospheres

Disposal

Prices

All parts of the NTK must be properly disposed of according to the material specifications. The valid disposal prices of the NTK are available on request.

Material specifications

All parts of the NTK can be recycled.

for NTK16 / 25 / 40
** for NTK X

References

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