I have a question, i have viewed a few of your videos on how these antique siphons work, i am amazed at your beautiful explanation and descriptions. So well done. I have a newer ISI siphon. I have bought a 5 pound CO2 cylinder and equipment to charge the system with a ball lock, so far i have not been able to get sir in my siphon. I am upset with myself by now, is there anything in this system that should prevent CO2 charging from a gas line ball lock? Any modifications that would make it work?? Sure would love to make this happen. Can you help me please with a potential solution??
The modern ISI syphons (and most other makes too, which have a usable volume of about 1 litre when properly used) contain a non-return valve built into the charging socket part. (The Sparklets type B shown in this video, which was made in about 1910, did not contain such a feature and so the capsule needed to be left in place during use.) When the capsule is pierced the CO2 gas escapes into the partially water filled body of the syphon and will be dissolved in the water to create the carbonated water you expect. The gas pressure in a CO2 capsule - or cylinder - is of the order of 600 psi (to maintain the CO2 as a liquid inside) but modern capsules meant for soda syphons only contain 8 grams of CO2. At room temperature this is equivalent to a volume of about 4.5 litres of CO2. So the peak (design) pressure for a normal soda syphon (which, by design, has a small void space inside which is deliberately not filled with water) is about 100 psi before the CO2 partially dissolves into the water, reducing the pressure inside. CO2 is also more soluble in cold water, meaning the actual pressure of a chilled syphon when you use it on your bar is much lower - probably of the order of 10 to 30 psi. What you are proposing is pretty challenging and potentially very dangerous! This is because you need to have a means of controlling the pressure inside the syphon during charging to less than the rated design pressure or it may burst/explode. A direct feed from a CO2 cylinder at 600 psi will cause the syphon to explode as they are not designed to contain such pressures! You need to regulate the incoming gas pressure to a safe level for the syphon but sufficiently high to allow the gas to pass into the syphon body via the non-return valve. Consult a gas system design engineer to ensure your proposed system will work safely. Do not attempt to defeat any safety features designed into the syphon!
Your videos are awesome, thank you so much. I am thinking of buying a Type C and understand you must leave the capsule attached while using. If its in good condition, will it keep in the fridge with the cartridge still attached and not go flat for a few days?
We find that once all the sealing surfaces in a Type C (D or any vintage syphon) have been properly cleaned during the reconditioning process, and if stored in a normal domestic fridge, these syphons will still keep good levels of carbonation for well over 5 days. In most cases even the type C will preserve good levels of fizz for a couple of weeks. The key thing is to keep them in a fridge as CO2 dissolves into cold water much better than room temperature water. A soda syphon left out on a counter top for many days will lose its fizz more quickly but I can't say how much faster this is. During our post reconditioning testing of customer syphon heads we generally test our repaired syphons for gas and water leaks from the seals over a period of around 3-5 days. If they last that long then they are generally good for longer periods. Type C syphons are a little more prone to leaks but when they are set up correctly (no visible leaks after charging with CO2 gas) will keep their pressure at good levels for many days or even weeks.
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I have a question, i have viewed a few of your videos on how these antique siphons work, i am amazed at your beautiful explanation and descriptions. So well done. I have a newer ISI siphon. I have bought a 5 pound CO2 cylinder and equipment to charge the system with a ball lock, so far i have not been able to get sir in my siphon. I am upset with myself by now, is there anything in this system that should prevent CO2 charging from a gas line ball lock? Any modifications that would make it work?? Sure would love to make this happen. Can you help me please with a potential solution??
The modern ISI syphons (and most other makes too, which have a usable volume of about 1 litre when properly used) contain a non-return valve built into the charging socket part. (The Sparklets type B shown in this video, which was made in about 1910, did not contain such a feature and so the capsule needed to be left in place during use.) When the capsule is pierced the CO2 gas escapes into the partially water filled body of the syphon and will be dissolved in the water to create the carbonated water you expect. The gas pressure in a CO2 capsule - or cylinder - is of the order of 600 psi (to maintain the CO2 as a liquid inside) but modern capsules meant for soda syphons only contain 8 grams of CO2. At room temperature this is equivalent to a volume of about 4.5 litres of CO2. So the peak (design) pressure for a normal soda syphon (which, by design, has a small void space inside which is deliberately not filled with water) is about 100 psi before the CO2 partially dissolves into the water, reducing the pressure inside. CO2 is also more soluble in cold water, meaning the actual pressure of a chilled syphon when you use it on your bar is much lower - probably of the order of 10 to 30 psi. What you are proposing is pretty challenging and potentially very dangerous! This is because you need to have a means of controlling the pressure inside the syphon during charging to less than the rated design pressure or it may burst/explode. A direct feed from a CO2 cylinder at 600 psi will cause the syphon to explode as they are not designed to contain such pressures! You need to regulate the incoming gas pressure to a safe level for the syphon but sufficiently high to allow the gas to pass into the syphon body via the non-return valve. Consult a gas system design engineer to ensure your proposed system will work safely. Do not attempt to defeat any safety features designed into the syphon!
Your videos are awesome, thank you so much.
I am thinking of buying a Type C and understand you must leave the capsule attached while using.
If its in good condition, will it keep in the fridge with the cartridge still attached and not go flat for a few days?
We find that once all the sealing surfaces in a Type C (D or any vintage syphon) have been properly cleaned during the reconditioning process, and if stored in a normal domestic fridge, these syphons will still keep good levels of carbonation for well over 5 days. In most cases even the type C will preserve good levels of fizz for a couple of weeks. The key thing is to keep them in a fridge as CO2 dissolves into cold water much better than room temperature water. A soda syphon left out on a counter top for many days will lose its fizz more quickly but I can't say how much faster this is. During our post reconditioning testing of customer syphon heads we generally test our repaired syphons for gas and water leaks from the seals over a period of around 3-5 days. If they last that long then they are generally good for longer periods. Type C syphons are a little more prone to leaks but when they are set up correctly (no visible leaks after charging with CO2 gas) will keep their pressure at good levels for many days or even weeks.
@@acquaspumante_for_soda thank you!