Hi everyone, like most I'm pretty much a beginner with pressure lanterns I read on the forum and there are very nice and polite topics, but I did not find for the exact butterfly 826 model an explanation regarding the potentiometer for increasing and decreasing the throttle in the mantle. I received the lantern and it is in very good visual condition. Before I poured the kerosene I pumped in some air to check the situation. The needle on the manometer does not move. When I unscrew the small screw on the pressure gauge to release the pressure, nothing happens, it's like it's clogged. To begin with - nothing terrible. I'll look into buying a pressure gauge. But, when the pressure is in the tank and the red arrow of the larger valve is up or down, I can feel air coming out of the nozzle in both cases. Therefore, in one case the air output at the nozzle is of lower intensity and in the other case of higher intensity. I can't stop the nozzle from blowing air in any position of the red valve. I guess it's not okay? then I dismantled the red valve and pulled out the lever. I see an eccentric that pushes the tube up and down that goes towards the nozzle. I don't see the tube that goes into the tank. I don't know if it should exist or this model doesn't have it or I didn't even see it because it was left in the construction that leads to the tank. I did not dismantle that part. I put everything neatly back in place and the lantern is sitting on the shelf Can someone help me? If necessary, I can disassemble the parts again and photograph what is needed. Thanks a lot! Stanislav
This may help. The lamp cannot be throttled it's either on or off. The control just pushes a cleaning needle into the jet which will affect the flow but not stop it. ::Neil::
That's what i thought too. But then I came across schematics and drawings for some other models and saw that there is a valve on the tube that goes into the tank with kerosene, which is connected to the red valve and closes the flow of kerosene into the nozzle. Thank you very much Mac, file will help me a lot!
Hi Stanislav. Welcome to the forum. You are right - there must be a tube to bring the fuel from the tank to the carburettor (vaporiser) If you look at the drawings there are two different types of assembly. In one the pipe goes directly from the "valve" body down into the tank. In the other type there is a "dog leg" in the valve body and then the pipe goes into the tank. Which do you have ?
Hello Fire and thanks for the welcome! Yes I saw that there are two models and I think mine is the second one model (115r). I will check and write. I am still troubled by the question of whether kerosene should come out of the nozzle regardless of the position of the red valve that lets the kerosene into the mesh (mantle). Regardless of whether the notch on the red potentiometer is up or down? Thanks again!
The Butterfly model 826 does not have any shut off valve, check valve or non-return valve along the fuel line to prevent the tank from gradually loosing pressure through the jet or gas tip (nozzle) orifice; part 50 in the above. instructions. Lantern shutdown is done by relieving the pressure using the shut off screw or valve on the fuel filler cap. If the lantern is clean, then you probably pressurize it with some kerosene and further check for any fuel leaks on the fount and other attached parts. There is a non-return valve at the bottom end of the pump tube to prevent fuel or air from escaping as you pressurize the tank/fount. Only use kerosene. Never use petrol / gasoline or any highly volatile fuels in this lantern. Follow the operating instructions. Preheat is always required. During lighting, only start pressurizing/pumping when the spirit preheating step is approaching the end.
Clearly! I understood everything. I thought my lantern was broken because I can't stop the kerosene coming out of the nozzle with the red wheel (valve) while there is pressure in the tank. The next step is to buy a pressure gauge with a small screw to release the pressure - and light the lantern Thank you very much!
Progress ! You do not have to have a pressre guage. 50-60 strokes of the pump will do. To release the pressure just loosen the fuel cap. Kerosene fumes are safe (but do not use petrol) put some oil (machine, olive etc) on the pump leather to make it nice and soft.
Hi guys, just dropping in and reporting on the situation. I followed all your advice and my lantern was successfully lit. Thank you all once again!
If you follow the steps as explained by Myn, you won't have any problems! Only start pumping after preheating for at least a minute, and then slowly turn the valve open.
