repair leaking pressure release valve on 8r hunter

As concerns 8r,
pressure increase gives good increase in power, but I dont advise you to increase pressure in uniq construction.

see for example http://foto.mail.ru/mail/gve-82/tyrist/

stove power depends on 4 things
1) jet diametr
2) pressure
3) premixing capacity
4) vapor produce capacity

the first and second point gives mass flux of fuel through nozzle.
3-d means that all fuel thrown out is mix with air in sertain proportion.
4-th means that all fuel thrown and premixed can be vaporized inside stove.

 

Hey where does one get a pentagonal key the right size for the pressure releif screw??
Can make up a test bed easy enough.
Its the five sided thing I'm having trouble with.

Bruce

 

I would not want to run a self pressurizing white gas stove without a safety valve. The older style safety valve was cruder. There was a rod soldered through the tank. The Idea was that if there was an instance of extremely high pressure, the concave bottom of the tank would flex downward. (Think of a frozen soda can) this would pull the rod down and make a hole in the top of the tank. the pressure would then vent through the hole. this would render the stove unuseable. Point is, I wouldn't want to bet that the escape of the fuel through the jet would be enough to keep the pressure in check.

 

Re the rod pulling out of the tank; the instructions for the 71 say that if this does occur, one can resolder the rod, after depressing the bottom of the tank. Now that's what I call a robust burner. Try that after a rupture on a flashy plastic job and see what happens!
Rob

 

It may not but that would be the least of your problems in the event. The sudden release of a volume of hot petrol vapour upwards into the vicinity of a lit burner is a more alarming prospect. (It's a known fact that this would occur whilst you were tasting the soup! )

 

yup. those were the days. I'm pretty sure the legal department would get involved before that got printed in a modern stove manual, regardless of the construction.

 

My first stove was I think 71 and after loaning it to my bro, I noticed that the fuel cup was "expanded" out due to internal pressure build up ( I can't rememebr looking at the bottom of the stove to see if the base had expanded out too). When I questioned him about it he said he had a big flare up and could never get the thing going. He is not a very practical dude. I threw that stove away as I guessed it was buggered. That was years before I started collecting them.

I know of a hunter that got a blast of flamining white spirits in the face out of an 8R cap. I don't know the circumstances but I guess it was a flare up during starting. He had a good day to walk out to civilisation. Don't mess about with pressure problems with white spirits. If I had a leaking cap on an 8R I would replace the cap.

 

That seems like a sensible habit to learn, might have to work on that...