Fire Extinguisher tyre pump?

[Paul Ruinaard]

Ok I understand that 110% , but I am working with 80-85 psi...

what scares me more is the coke bottle mate. That canister is not designed to be pressurized and depressurized repeatedly.

 

And it doesn't have a way of telling you when it will fail - just goes bang in your face....

 

80 PSI in a cylinder like that will blind you ...

 

Anyway - as I said your funeral. See V12Man's reply....

[PhilipV]

2 litres is a small volume. And given that tyres are inflated to 80 to 100 PSI(road) and upwards your project will likely not work. Even and MTB tyre is at 20 to 30.

 

You need something a lot larger than 2 litres and at pressures above that. You need to have a bigger reservoir effectively to achieve the air blast that you need to pop a tyre on.

 

Honestly take your money to a shop and buy the Bontrager pump that has it all built in...

 

Get a tank first - regulators are later.

Are you sure? My 2l ghetto coke bottle setup pumped to 5 bar works a charm. On big volume 29er tyres as well.

The bontrager setup is nice, without a doubt, but there is no chance I'm paying that much. Last time I checked it was something north of a 1000 Zars. The Airshot as well.

 

Ps: PET bottles start failing at 150psi

[Paul Ruinaard]

Are you sure? My 2l ghetto coke bottle setup pumped to 5 bar works a charm. On big volume 29er tyres as well.

The bontrager setup is nice, without a doubt, but there is no chance I'm paying that much. Last time I checked it was something north of a 1000 Zars. The Airshot as well.

 

Ps: PET bottles start failing at 150psi

I wont argue the throw with you - as I said it scares me that you are using a 2 l bottle.

 

it may handle 150 PSI when manufactured but it is not designed for multiple inflations and deflations.

 

And it doesn't tell you 20 minutes before exploding that the sun has now made the PET brittle and its going to lodge in your jugular next inflation.....

[Grebel]

Its inside of another bottle and wrapped in duct tape to prevent shards if exploded BUT I am replacing it with a dedicated air pressure tank that is going to work at 80 psi

IMO you are better off with the 2lt tank than with the 2lt plastic bottle inside a container.

[kk6gan]

I have so far seated all my tubeless tyres at the BP down the road. Think I will stick to that…seems pretty safe

[PhilipV]

I wont argue the throw with you - as I said it scares me that you are using a 2 l bottle.

 

it may handle 150 PSI when manufactured but it is not designed for multiple inflations and deflations.

 

And it doesn't tell you 20 minutes before exploding that the sun has now made the PET brittle and its going to lodge in your jugular next inflation.....

Fair point wrt multiple inflations.

I'm going to throw my bottle away and start with a fresh bottle every time. It's cheap enough. I can even redo the cap every now and then and just reuse the valves.

 

That being said, I won't be surprised if some of the bigger manufacturers catch onto this idea and bring units to the market at lower price points soon.

[V12man]

What the man says.

 

You are talking about pressures in excess of 200 pounds per square inch. THink about your 200 pound mate sitting on your chest to get an idea of how high that is.

No - its a lot higher - think about your girlfriend standing on you with her high heels only...

 

We do know your mates butt is about 280 square inches - so 1 psi maybe....

[Frank.Hutt]

No - its a lot higher - think about your girlfriend standing on you with her high heels only...

 

We do know your mates butt is about 280 square inches - so 1 psi maybe....

 

so now the whole container debate is rendered moot - girlfriend, high heels and willing to stand on you....

[Shebeen]

Your funeral:

 

who needs anymore evidence?!!

 

I watched this about 5 times...before even the slomo was on!

wonder if they ever found his cap.

 

 

dude#2 got out of way in time...thing landed just where he was.

[Eddy Gordo]

http://singletrackworld.com/forum/topic/ghetto-tubeless-inflator-mk-vii

[Sepia]

That looks proper.

Still want to put the regulator in.

Also want to have the system pressure tested by a company which does all our dive cylinders.

[Eddy Gordo]

Yeah regulator and gauge for sure

[Skylark]

Yoh all the videos and naysayers have got me rattled.

 

But if a extinguisher can is rated for the pressure and you virtually never hear of extinguishers randomly exploding or exploding at all(and they are typically hung on walls at eye level and in heavy traffic areas including high liability public locations like shopping malls, why aren't risk assessors banning them?) and further to that as a tyre inflator will be pumped to well below their rated pressure what really is the risk?

 

Do people gingerly approach their Adenhoff/Makro etc cheapie chinese air compressors in fear they may rupture at any moment, never heard of household air compressor being high risk devices prone to exploding?

[Sepia]

Those heavy duty tire generally have a metal bead (separate) which is used to hold the tire rim in place,  If not fitted correctly, the tire can pop of.  The metal bead ring can be seen in the pic lying by itself.

[Eddy Gordo]

Yoh all the videos and naysayers have got me rattled.

 

But if a extinguisher can is rated for the pressure and you virtually never hear of extinguishers randomly exploding or exploding at all(and they are typically hung on walls at eye level and in heavy traffic areas including high liability public locations like shopping malls, why aren't risk assessors banning them?) and further to that as a tyre inflator will be pumped to well below their rated pressure what really is the risk?

 

Do people gingerly approach their Adenhoff/Makro etc cheapie chinese air compressors in fear they may rupture at any moment, never heard of household air compressor being high risk devices prone to exploding?

No man, there is no issue with Extinguisher tanks, gas tanks, or dive tanks.

[Boerklong]

I've seen one of those rings jump off. Not a pleasant feeling. There is a reason those things are supposed to be pumped in a cage