Fire Extinguisher tyre pump?

[BaGearA]

A regulator regulates the supplied pressure. IOW if you pressurize your tank to 10Bar and set the regulator to 2Bar, and line pressure after the regulator will be 2Bar.

 

Just bear in mind that you are looking for volume of air (or more specifically a certain volume of air in a certain amount of time) to seat a tyre and not necessarily just pressure...

Thank you this was the answer I was looking for, would it be necessary when working with 80psi ?

 

I wil be getting a 2L air tank monday then get the fittings for filling and relesing the ait just need to know if you think I should add a regulator aswell

[Grebel]

Thank you this was the answer I was looking for, would it be necessary when working with 80psi ?

 

I wil be getting a 2L air tank monday then get the fittings for filling and relesing the ait just need to know if you think I should add a regulator aswell

 

80Psi is 5,5Bar

 

There is no right answer.... Depends on your container, how proficient you are around compressed air, how you set it up etc...

 

If you for example, pressurize said 2lt container up to 80Psi using a plumbed schraeder valve and have a 1/2" ball valve connected to a flexible hose that connects to the tyre, then you could release a burst of air that would seat the tyre. Worst case scenario is that you pop the tyre over the bead or even worse, rupture the side wall (But I doubt that will happen with 5 Bar. I could be wrong though...)

 

If you use a dive cylinder that is pressurized to 200Bar then I would highly recommend using a regulator!!!

 

DISCLAIMER: Compressed air is dangerous!!!! If there is any doubt in your mind or you don't understand how something works, rather walk away and leave it to someone else. Any pressurized container is effectively a bomb that if it ruptures, has the potential to kill or maim you or those around you

[Paul Ruinaard]

Thank you this was the answer I was looking for, would it be necessary when working with 80psi ?

 

I wil be getting a 2L air tank monday then get the fittings for filling and relesing the ait just need to know if you think I should add a regulator aswell

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.

[BaGearA]

Is't the point of this project not to just seat the tire

 

Cause I currently use the 2l coke gettho( this why i am getting a 2L tank) version , pumped to 80psi and seats my tires nicely and getts them to around 19 psi

 

This is working perfectly , just pump up and release all the air  "POP!" and then i go riding.

 

I don't trust the plastic bottle and that is why I am wanting to do it with a sturdy tank.

 

** I am no expert with pressure tanks BUt I am also not some idiot who does not know what he is doing at all  just looking for the advice to get the best results

[Paul Ruinaard]

80Psi is 5,5Bar

 

There is no right answer.... Depends on your container, how proficient you are around compressed air, how you set it up etc...

 

If you for example, pressurize said 2lt container up to 80Psi using a plumbed schraeder valve and have a 1/2" ball valve connected to a flexible hose that connects to the tyre, then you could release a burst of air that would seat the tyre. Worst case scenario is that you pop the tyre over the bead or even worse, rupture the side wall (But I doubt that will happen with 5 Bar. I could be wrong though...)

 

If you use a dive cylinder that is pressurized to 200Bar then I would highly recommend using a regulator!!!

 

DISCLAIMER: Compressed air is dangerous!!!! If there is any doubt in your mind or you don't understand how something works, rather walk away and leave it to someone else. Any pressurized container is effectively a bomb that if it ruptures, has the potential to kill or maim you or those around you

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.

[BaGearA]

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.

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

[Eddy Gordo]

One would definately need a regulator of sorts to make it work safely. Compressed air is no joke.

 

I will never forget the day my friend rocked up at tokai and realised he needed to ad air in his tyre and pulled one of those tiny compressors out of his van. The thing was running for 2 minutes and didnt inflate his wheel halfway. I just laughed, went to my boot and pulled out a 95L/min compressor and he inflated his wheel in 10 seconds.

 

I now have a 150l/m one, works a treat.

[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.....

[BaGearA]

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.....

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

[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....