Hi! Formerly, I've questioned here for the same query for expecting experts' answer. Until now, I could not know the proper answer the said question. Actually I would like to know whether the plate thickness of fount is strong enough to resist a certain pressure. Anyone who knows on this issue is kindly asked to provide his/her factual data on this issue. Thanks in advance.
Interesting, although I'm no expert. "such as Optimus 00" Very interesting, on one hand there is pressure testing of tanks by manufacturer. That is a coleman steel tank but Swedish makers also tested tanks / stoves. What the pressure specification is, is not published. A stove is tested and leaves the factory with ample tank integrity to operate as designed, per instructions (& warnings) provided. Some tanks are more robust than others, it depends on the use it is designed for. The 00 is lighter weight, less robust and may not be designed to withstand higher pressures (I think not but dunno). In fairness, might you also share what your intended use is for the 00 tank ? ------------------------------------------------------------------------- A "00" is strictly kerosene and has no SRV (safety release valve), this is key, because other models (including other kero models) do have a SRV. Your inquiry is re a "00". Given a dangerous sequence of events (neglect of designed or integral saftey) ANY tank can over pressurize, expand and even rupture. Re your 00 example, the thread size of the filler cap is the same as MANY caps with SRVs. Removing the 00 cap means also removing the vent screw option BUT adding an "SRV cap", to experiment with, may interest you? IF your next question is what pressure does the SRV release: A. I do not know (a working SRV will release prior to tank failing / expanding). and B. if left unattended SRV does not necessarily prevent rupture, it provides, initially, a candle flame from cap as warning that the tank is over pressurized. A safety feature that remains in use as designed, that was invented in the 1880s btw.
Thanks, OMC, especially on the Coleman pressure test condition with specific pressures. Pressurizing through hand pump would be of the same result in pressure gauge, so called normal operation pressure. Factually, I would like to know the relationship between brass fount plate thickness and its pressures for various brass founts with factual measuring information. Yes, I still use "00" for cooking with kerosene fuel. My question is just focused on the plate thickness of the fount. Might my next question be of the same mentioned ones by you, such as SRV release pressure. That is also quite interesting subject for me!! Thanks again on your reply.
PRV Test rig made, But what Pressures ? The stainless steel fuel tank of British Military No.12 stoves is pressure tested to 7Bar or 100 pounds per square inch (psi) https://classiccampstoves.com/threads/british-military-no-12-instructions.27031/#post-461237 Best Regards Kerophile.
I currently have three scrap fonts with sections cut out, an Optimus 00, a Monitor 2 pint, and a Primus 5 senior. I have just measured them with a digital micrometer, and the brass thickness of their tops, sides and bases varies between 0.7 and 1.0mm. These are kerosene stoves, and I recently measured the operating pressure (here) at 10-12psig. The safety release valves (if fitted) are typically set at 4 to 6 times this.
Really awesome experimental results and observations. Thanks a lot. I will read your posts and further threads carefully.
@SY Kimm Glad you have something to work with, but your post here and the one you posted on Classic Pressure Lamps makes me wonder where you’re headed with the information? I mean, what project do you have in mind? Pardon my curiosity! John
@SY Kimm I have had reason to mutilate a Tilley X246B tank. It’s brass is 1.00mm thick. Later today I will look at a heavily damaged Primus stove tank and tell you the thickness of the brass. Cheers Tony
So far, no special project in my mind, Presscall. Just my own curiosity as an engineer. By the way, the safety operation condition for stove and/or lantern is quite interesting to me.
Oh! Thanks for your kindness. It would be also expected for me to understand the mechanism of stoves and lanterns.
@SY Kimm This 1927 Primus No.1 S:or has brass of ~0.75mm. This 1932 Primus rocket stove has 1.00mm brass. Cheers Tony
