Silver soldering torch

[KEITH BEAUMONTParticipant @keithbeaumont45476]

Bill. Thanks for that information. I now know just exactly what I have. I will add a 2 Bar regulator before I use it again.

Keith.

[noel shelleyParticipant @noelshelley55608]

Hi Keith, Since you have been using a HFV as a form of regulator I would consider using a 1-4bar adjustable regulator. You may not get the heat your used to with only 2 bar. Some sievert burners are rated for 4 bar. Noel.

[Bill PhinnParticipant @billphinn90025]

Yes, I agree with Noel: get a 1-4 bar regulator if you get any. Only get the fixed 2 bar if it is going cheap as mine was.

The HFV alone may not offer the same fine-tuning versatility as an adjustable regulator will but it still gets the job done, as I’m sure you’ve discovered. The HFV comes into its own if you’re working in arduous conditions (e.g. outdoors) with a long hose length.

[KEITH BEAUMONTParticipant @keithbeaumont45476]

When I look at the price of a 1-4 regulator, I think I will settle for what I have. I am only an occasional user and so far have managed to achieve reasonable results, but thanks again for all the  useful advice.

Keith

[Bill PhinnParticipant @billphinn90025]

That’s fair enough, Keith, but, just in case you haven’t seen it, this inexpensive choice will be more than adequate for the job:

https://www.gasproducts.co.uk/gas-regulators/propane-gas-regulators-high-pressure/cavagna-high-pressure-adjustable-propane-regulator-0-5-to-4-bar.html

[Bill PhinnParticipant @billphinn90025]

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[KEITH BEAUMONTParticipant @keithbeaumont45476]

Bill , I appreciate your efforts to help me and the item on your link ,at that price, is certainly worth buying. I have phoned Hamiltons,told them what kit I have and do they have a regulator that fits directly on to the Sievert 305401. The reply is they do not have such a fitting and do not recommend trying to use both items together,as the Hose safety device will  interfere with the workings of the regulator!

Keith.

[Bill PhinnParticipant @billphinn90025]

O dear! I’m disappointed in Hamilton Gas. It’s no wonder the end user is apt to get confused. I suppose such ignorance on their part is inevitable when they made the howling mistake of thinking it was a good idea to let AI do the product descriptions on their site.

Have a look at the following page on Hamilton’s site – one that, fortunately, has not yet been put through the AI mangle:

https://support.gasproducts.co.uk/hc/en-us/articles/360003842677-Choosing-Parts-for-a-Sievert-Blow-Torch-System

Look under the heading “Regulator and Hose” near the bottom of the page. See the last two entries under the sub-heading “Regulator”. I’ll quote it to save people the bother of going there:

<b>“Inline Sievert 2 Bar Regulator – Can be used with the Hose Failure Valve 305401 below</b>

<b>Sievert 305401 Hose Failure Valve – Not a regulator itself but can be combined with the above. Recommended for use with long hoses when there could be a risk of the hose being damaged. Cuts off the gas when a leak is detected.”</b>

It seems also that Noel and myself have given you the wrong impression when we recommended using an adjustable 1-4 bar regulator. I don’t think Noel was suggesting you were to use such a regulator in line with the HFV, and I’d already cautioned you about not all regulators having the right connections to allow you to do so. My assumption was that you might like to try the regulator in my link independently of your HFV. There are off-the-peg adaptors in any case that will allow you to couple many adjustable regulators with the HFV.

 

 

 

[Nicholas FarrParticipant @nicholasfarr14254]

Hi, both Butane and Propane are LPG’s, and when under pressure, which is about 7.5 Bar however large your cylinder is, they will be a liquid inside the cylinder with a vapour above it, however, just like water they will freeze, where Propane freezes at about -42.1 C, butane will freeze at about -0.5 C. Now if you stand a kettle on your cooker and don’t light/turn it on, you will never “boil” it. The same thing has to happen with both Propane and Butane, that is, if you don’t draw of the vapour, the liquids won’t boil, but unlike a cooker, you don’t heat it with a flame or an electric ring, instead the heat is drawn through the wall of the cylinder from the atmosphere, thus on a cold day you won’t get the same heat energy as you do on a warm or hot day, and thus you’ll get a lower volume of gas out of your torch, so you can see that Butane is less likely to deliver enough gas for your needs on a cold day. to overcome this problem, you can gang two or more cylinders together of propane and of butane, via a Y connecter or a manifold.

P.S. don’t connect both Propane and Butane together on the same Y/manifold though.

Regards Nick.

[noel shelleyParticipant @noelshelley55608]

Some of Nicks comment may be misconstrued. You will get the same heat out of your equipment UNTIL such time as the bottle pressure starts to drop. Propane and Butane do not freeze at -42.1c ( though water vapour may ) or -0.5c, above these temperatures they vaporise. When the bottle is full it presents a large surface area through which it can draw heat to maintain the vaporisation but as the content level drops this area is reduced and with it the heat available, pressure in the bottle will drop. As this happens and approaches the regulated pressure THEN the heat available will drop. On a very cold day with a butane bottle less than 1/3rd full it will deliver almost no gas at all, seen it happen. On a very cold day many years ago, I poured some liquid butane into an old bean tin – several hours later, before I understood all of this I was astounded to find it just as I had left it – it was too cold to boil off. Ganging Butane bottles will not work if it is a frosty day ! The calorific values of the 2 gasses is quite similar. Noel.

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