Assembly and Operating Instructions for Netter Pneumatic Linear Vibrators These operating instructions apply to: NTK 8 AL NTK 15 x NTK 16 NTK 18 AL NTK 25 AL NTK 25 NTK 28 AL NTK 40 AL NTK 40 NTK 55 AL NTK 55 NTK 85 NTK 110 June 2016 BA No.
Table of Contents 1 GENERAL INSTRUCTIONS 3 2 SAFETY 5 3 TECHNICAL DATA 7 4 STRUCTURE AND MODE OF OPERATION 10 5 TRANSPORT AND STORAGE 11 6 INSTALLATION 12 7 START-UP/OPERATION 15 8 MAINTENANCE, SERVICING 17 9 TROUBLESHOOTING 18 10 SPARE PARTS 18 11 ACCESSORIES 19 12 DISPOSAL 20 13 APPENDICES 20 Scope of delivery The NTK units are supplied as standard with the following components: • Pneumatic linear vibrator (NTK) • Operating Instructions • Packaging Check the packagi
1 General instructions Information about the operating instructions Using and storing the operating instructions Before using the NTK series pneumatic linear vibrators, you must read these operating instructions carefully. They are the basis for all actions concerning the NTK and can also be used for training purposes. The operating instructions must then be stored in the vicinity of the product.
The following information and hazard symbols are used in these operating instructions. DANGER indicates a possible danger that can lead to death, physical injury and/or damage to property if this instruction is not complied with. WARNING indicates a possible danger that can lead to physical injury and/or damage to property if this instruction is not complied with. IMPORTANT Instruction with particularly useful information and tips.
2 Safety Correct use: The linear vibrators are intended for installation into machines. These machines use linear vibrators for discharging hoppers, as drives for conveying troughs, sieves and vibration tables. All other uses are deemed to be improper use. WARNING Qualification of the authorised technical staff: The linear vibrators may only be installed, put into operation, serviced and faults rectified by authorised, qualified specialists.
Source of danger: NTK vibrators have moving parts. Possible consequences of disregarding: Injuries for example bruises and crush injuries may be caused. WARNING Avoiding the danger: 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. The piston with swing mass SM 8/1 is covered with this. Source of danger: NTK vibrators have moving parts.
3 Technical data Mass Working torque Rated frequency [min-1] [kg] [cmkg] Type NTK 8 AL* (P+SM 8-2) NTK 15 x* (P+SM 16-2) NTK 16 NTK 18 AL* (P+SM 16-1) NTK 25 AL* (P+SM 25-3) NTK 25 NTK 28 AL* NTK 40 AL* (P+SM 25-3) NTK 40 (HF) (NF) NTK 55 AL* (P+SM 85-1) NTK 55 (HF) (NF) NTK 85 (HF) (NF) NTK 110 SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW 1 0.030 3 0.088 1 0.135 3 0.675 1 0.15 2 1.33 1 0.21 3 0.53 1 0.420 3 1.655 1 0.47 2 2.60 1 0.59 3 0.91 1 1.240 3 2.475 1 1.27 2 4.
Permitted operating conditions: Drive medium: Clean (filter ≤ 5 µm DIN ISO 8573-1 Quality Class 3) compressed air or nitrogen Operating pressure: 2 bar to 6 bar* Pressure must not fall below or exceed operating pressures. Lubrication: A mist lubricator is recommended by NetterVibration for all vibrators. Fill mist lubricators with acid-free and resin-free compressed air oil, ISO viscosity class to DIN 51519, VG 5 to VG 15. Recommendation: Klüber “AIRPRESS 15” for temperatures up to 60 °C.
Dimensions [mm] Type A NTK 15 x 15 50 16 49 18 49 25 64 40 84 55 110 NTK 16 NTK 18 AL NTK 25 NTK 40 NTK 55NF NTK 55HF NTK 85NF NTK 85HF NTK 110 B C E F 114 9 38 111 5 38 116 8 42 138 9 52 1 140 12 54 125 19 55 G* H J K L M Q** 23.5 21.5 25.0 30.5 33.0 38.0 M 10 M 10 M 10 M 16 M 16 M 20 — — — — — 96 — — — — — — G 1/8 G 1/8 G 1/8 G 1/4 G 3/8 G 3/8 G 1/8 G 1/8 G 1/8 G 1/4 G 1/4 G 3/8 — — — — — 55 110 115 29 65 47.0 M 20 96 — G 3/8 85 160 122 20 45 32.5 M 20 143 12.
4 Structure and Mode of Operation The vibration is generated by a freely oscillating self-reversing piston. Both masses, on the one hand the piston with swing weight, on the other the housing and the mass fastened to it, oscillate against each other in proportion to their total weights. If the vibration amplitude of the mass to be vibrated becomes larger, a larger swing weight is simply bolted on to the piston.
5 Transport and storage DANGER For transporting the vibrators NTK 85 and NTK 110 suitable lifting gear must be used. For lifting a transport lug can be screwed into the piston or the housing (thread M 20). Lifting and lowering is to be started carefully as the piston moves in and out of the housing. Take care when lifting and lowering! Check the packaging for any damage in transit. In the event of damage to the packaging, inspect the contents for completeness IMPORTANT and any damage.
6 Installation Ensure that the compressed air is switched off during installation or any work on the vibrator and the supply lines. Do not use thread pieces longer than intended for compressed-air connections. WARNING Under no circumstances must parts of Teflon sealing tape get into the vibrator. Installing the vibrator: Housing fixing Piston fixing Depending on purpose NTK 8 AL to NTK 40 can be bolted either with the housing or WARNING the piston.
Use nuts that are self-locking to prevent them coming loose or use a liquid securing agent e.g. Loctite 270. Also secure the air supply hoses with suitable securing agents. Apply tightening torques according to the table below. WARNING Higher tightening torques may lead to broken screws or stripping of threads. Incorrect screw connections may lead to the devices working loose as a result of vibration.
When operated oil-free or in a dusty environment, NTK vibrators must not be used without bellows or other dust protection. WARNING Fitting the bellows: Clean (degrease) the contact surfaces on the vibrator and on the weight. Remove the protective foil (A), push the bellows over the piston and glue the bellows to the vibrator. Hold the piston on the wrench flats with a wrench and IMPORTANT fasten the weight with a strength class 8.8 screw. Secure the screw.
7 Start-up/operation NTK 8 AL approx. 1 drop/3 min NTK 15 x approx. 1 drop/3 min NTK 18 AL approx. 1 drop/3 min NTK 25 AL approx. 1 drop/min For the NTK vibrators oiled compressed air NTK 40 AL approx. 2 drops/min is recommended. NTK 55 AL approx. 2 drops/min When using dried compressed air and in extreme environmental conditions upstream connection of a mist lubricator is essential.
Choice of vibration amplitude: By attaching additional swing masses on the piston or on the housing you can change the amplitude and frequency. Small or no weight = low amplitude, higher frequency. Larger weight = large amplitude, lower frequency. Controlling the Frequency: With the pressure regulator of the maintenance unit the frequency can be set or controlled. Use a 3/2-way valve! The frequency can be down-regulated by reducing the air pressure in front of the NTK.
8 Maintenance, servicing Shut off the compressed air before any inspection or maintenance work and secure the machine to prevent it being WARNING turned on accidentally! IMPORTANT The drive medium must be clean (filter ≤ 5 µm, class 3). Unfiltered compressed air causes higher wear and tear, congestion of the silencer and the complete failure of the impactor. The servicing intervals become shorter. Maintenance schedule The maintenance must be carried out monthly.
9 Troubleshooting Fault Possible causes Troubleshooting Does not Connected wrong way start round. See illustrations under Chap. 4 “Structure and Mode of Operation” Air supply Check whether enough pressure is present. Check valve. Cover loose. A leaky cover causes the device to stop. Pipe diameters Observe minimum diameters Piping between valve Results in slow start-up und NTK too long. and possible stopping of the piston in centre position. Exhaust air throttled too Throttle and silencer much.
11 Accessories The following accessories are available (on request) for NTK linear vibrators: Description SM swing weights NFB bellows Hose material and screws/screw connectors 3/2-way valves Throttle valves Maintenance units Duty-pause time controllers Mounting brackets Special versions: Comment for all devices in various sizes for all devices except NTK 8 AL - for the NTK 8 AL - a screwon cover sleeve is available.
12 Disposal The parts must be disposed of correctly depending on the material.
