High-flow pneumatic air gun with valve for TENKA plastering machines

The mortar must hit the wall as if you were throwing it with a trowel to ensure it bonds. The mortar shouldn't just stroke the wall as it falls.

The compressor is okay, it handles working with 2-3 people. The machine we recommend is the one with 5 nozzles (3 for the wall, 2 for the ceiling).
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

The ideal hose should have an 8 mm inner diameter. If it is smaller than 8mm, it can get clogged and may limit the pressure at the nozzles. If it is larger than 8mm, it is better, but it is stiffer and more cumbersome. You will trip over it.

Thank you for your reply, but I have another question. Is the 9mm inner diameter hose okay, or must it be strictly 8mm? Thank you once again.

The one with 5 nozzles. The 3-nozzle models have been discontinued.

Thank you for the feedback. Good luck with your work!

Which model are you using, the one with 3 nozzles or the one with 5, and what compressor?

As manufacturers, we assure you that Tenka machines have been tested on various compressors and the tests were conducted in a practical, not theoretical, manner. More specifically, 2 people plastered with classic mortar using a 50 liter / 8 bar 270l/min. compressor and it worked flawlessly. The test lasted approx. 6 hours with this compressor.

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.

It works with Multibat and sand (as coarse as possible, large washed station sand 0.3-0.4); follow the recipe on the Multibat or Tenko bag.
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 like that there is no waste on the ground at all. That's good.

What compressor did you use?

What compressor do you have?

The flow rate seems low. It's strange. There are compressors with a 50-liter tank that have an intake flow rate of 270l/min. This one has 187l/min.?

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.

I plastered the exterior myself with TENKA in 3 days, less than 20 hours of work combined; I was the one applying the plaster (it requires some forearm strength), 1 person leveling with the straight edge, and 2 people at the concrete mixer and carrying. This was on the second day when we worked full time from morning until afternoon; on the first and third days, we worked in 3 people for about 4-5 hours each. You have to move fast because the plastering goes quickly; you can't get the job done with lazy or incompetent people. The sand must be okay, with no other impurities in the material, soil, stones, or hardened concrete, because you'll waste more time unclogging the pump than plastering. The pump must be disassembled and cleaned at every meal break because material gets inside, and if it hardens, it's much harder to clean.

They are currently in testing. I cannot give you an exact date.

If all the nozzles are running, what compressor is needed? Thank you.

It works with 3 nozzles but with short breaks. If you work with 2 nozzles, it runs continuously without problems. You can find an example with a similar compressor at another client here

Do you ship to the Republic of Moldova?

Now shipping throughout Europe.

The model with 5 universally lockable nozzles (walls + ceilings) is the newest and most updated in stock. You can use 1, 2, or 3 nozzles for walls or 1, 2 nozzles for the ceiling. The minimum compressor tested for this device must have at least 50 liters (tank), 8-9 bar, 270 l/min. intake flow. Look for the 2-piston model because it has a flow rate of 400 l/min. The nozzles are optimized, the gun has an increased flow rate and overpressure protection.
The ones with 3 nozzles will be discontinued soon.