Spare Parts and Accessories Kit
The kit includes 3 spray nozzles, a brass pneumatic valve, 2 nozzle blocking caps, and 2 o-ring seals (1.79mm x 2.90mm) for the pneumatic gun valve. Compatible with models TK-51, TK-31R, TK-31N.
Product details
The kit includes 3 spray nozzles, a brass pneumatic valve, 2 nozzle blocking caps, and 2 o-ring seals (1.79mm x 2.90mm) for the pneumatic gun valve. Compatible with models TK-51, TK-31R, TK-31N.
The nozzle blocking caps are practical accessories designed to allow quick configuration of the number of active nozzles based on the specific job and the available air flow.
Installation is extremely simple and requires no wrenches, tightening tools, or threading operations. Each cap snaps on quickly and completely blocks both the nozzle channel and the corresponding orifice through which the material is dispersed. Thus, nozzles that are not needed can be deactivated simply and efficiently.
By using the blocking caps, the hopper gun can be quickly adapted for different types of work. For plastering vertical walls, one, two, or three active nozzles can be used, depending on the requirements and the compressor capacity. For plastering ceilings, a single nozzle can be used, and it is recommended that the mortar container not be filled to maximum capacity for easier handling and better control during work.
Why is reducing the number of active nozzles useful?
The pressure and flow provided by the compressor must be distributed among all active nozzles. For this reason, using too many nozzles simultaneously can reduce spraying performance when the compressor cannot provide the necessary air flow.
For an efficient mortar throw at a distance of at least 30 cm, a pressure of at least 3 bar per active nozzle is recommended, along with an air flow of at least 80 l/min per nozzle.
For this reason, it is not recommended to use more than 3 nozzles simultaneously with standard commercial compressors. For example, in the case of a 10-bar supply distributed to four outlets, the available pressure may become insufficient to achieve a strong and uniform spray.*
The blocking caps thus offer the possibility to quickly adapt the gun to the available compressor and the type of work, concentrating air and material only through the necessary nozzles.
Main Advantages:
- quick installation and removal, no tools required;
- complete blocking of unused nozzles;
- ability to work with one, two, or three active nozzles;
- adapting the gun to the compressor's available flow;
- better control when plastering walls and ceilings;
- more efficient use of compressed air;
- simple, practical, and easy-to-use accessory.
Configure your gun according to the job and use compressed air exactly where it is needed.
*The actual pressure available at each nozzle depends on the compressor flow, hose diameter and length, regulator, system losses, and gun configuration.
Questions, comments and opinions
Questions and experiences shared by customers and users.
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Use classic mortar (multibat with sand or cement + sand + lime) with coarse sand .. 0.4-0.5 (from a gravel pit).
Tip: if you use welded mesh or steel of any kind, do not use lime in the mortar composition. make the plastering only with sand and cement. 6 shovels of sand + 1 of cement
So if you work at a relaxed pace in 2 people, we assure you that a compressor with a 50 liter tank, 8 bar pressure, and a minimum intake flow of 270 liters/minute is sufficient. The recommendation is for it to have 2 pistons rather than one.
You have here a video from one of our customers with a 50 liter / 8 bar compressor with a single piston.
Here is here also a compressor model with 2 pistons.
If you work in a team (one loads continuously, another levels with the straightedge, another carries bags, another mixes, etc.), the 50 liter compressor will drop the pressure to 5-6 bar and will not be able to keep it constant at 7-8 bar as it should.
In that case, a 100 liter compressor is necessary because its motor has the capacity to charge the tank faster at a constant pressure of 7-8 bar.
The nozzles of the plastering guns are calculated very precisely to fit within the parameters of these compressors. If I am not mistaken, the nozzle diameter is 2.35mm.
If you don't add enough cement, the mortar will bounce off the wall and won't set. You'll lose it on the floor.
If you add too much cement, the mortar becomes too sticky and hard to throw even with a hand trowel.
If you use classic plaster (sand + cement + lime), use the 6+1+1 ratio (6 shovels of sand, 1 shovel of lime, 1 shovel of cement) or a multiple (12+2+2). If you have rebar in the plaster for reinforcement, do not use lime in the mortar recipe because the iron will oxidize and you will have a rust stain that will always come to the surface of the wall.
TIPS:
- DO NOT leave the device in the water you washed it in because the cement water will penetrate the device and can harden.
- After washing the device, leave it in clean water during your work break.
- When unscrewing the nozzles to clean them, make sure the plastering machine is washed and clean.
- Also buy the pack of spare nozzles.
Soon we will update the models with a filter to stop all the dirt from the hose at the quick coupling of the plastering machine and to get rid of cleaning the nozzles. It is being worked on and will be released on the market as soon as possible. The filter will be placed at the entrance of the trigger's quick coupling and will retain any impurity in it, keeping the nozzles clean at all times.
I built a garage, and not being a professional, the walls weren't exactly straight, so I had to apply quite a thick layer when plastering. This is how it looks at the end: PHOTO
Approximately 400 sqm per day are applied by one person. I want to mention that on the first day we used very fine sand and it went very poorly. I thought the plastering machine was at fault. Then we switched to coarse-grained sand (0.4m) and it works superbly. I'll make a video.
So, for a compressor to work without issues in a hobby setting (meaning if you are plastering your own house at a relaxed pace), you need a minimum intake flow rate of 250 l/min, a pressure of 8-9 bar (never exceed 9 bar), and an air tank of at least 50 liters.
Ideally, it should have 2 pistons instead of just one. For 2-piston engines, the flow rate is double (400l/min) and the engine manages to fill the tank much faster and sometimes take a break.
If you work in a professional setting, meaning with a team (one at the concrete mixer, another loading, another using the straight edge), you need a compressor with a 100-liter tank, the rest of the parameters remain the same (flow rate, pressure, etc.).
If you already have a smaller compressor and do not wish to invest in a more powerful one, you can use the Tenka machine with only 2 nozzles. You block the rest of the nozzles; some blocking caps are included in the package. With 2 nozzles, the machine loads up to 2 cm of plaster thickness in a single second if you hold it in position. So it is quite fast even with 2 nozzles. The excess pressure will be released from under the gun trigger.
The ones with 3 nozzles will be discontinued soon.
Tip: buy at least 15 - 20 meters of hose to keep the compressor at a distance. The noise of the compressor causes irritation and stress after a day on the construction site.
The maximum recommended length of the hose is 50m. If you exceed this length, a half-second delay will occur from the moment you pull the gun trigger because the hose will equalize its internal pressure with that of the compressor tank. And the volume of the hose is already large at a length of over 50m, which causes the delay to appear. The hose must be fitted at one end with a male quick coupler (approx. 4 lei) and at the other end with a female coupler (12 lei). Or you can find it already fitted in Dedeman (approx. 50 lei) So:
- Inner diameter 8mm
- Hose length minimum 15m.
- At one end a male quick coupler and at the other end a female coupler example : here
The most commonly used and cost-effective mortar: link mortar
Cheap compressor (hobby) but tested by us on the 3-nozzle model: link compressor
Use sand with a grain size as large as possible: 0.3 - 0.4 mm
Other mortar recipes can be found in the instructions in the package. Good luck with your work and God bless.