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Pressgas stove from former East Germany

Discussion in 'Other Brands' started by presscall, Feb 14, 2015.

  1. presscall

    presscall United Kingdom Subscriber

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    Thanks Peter.

    The removable riser tube?

    You know, it doesn't seem to make a huge difference if raised or lowered five millimeters either way, though it would surely affect combustion badly if lowered to the extent that it was so close to the jet nipple that little air could get into the riser for the correct fuel/air mixture.

    I expect that without it there'd be 'underburn' with silent burner caps, when the fuel/air column ignites before reaching the combustion space.

    Of course, it's essential too to locate the silent burner caps centrally on the burner.

    The BernieDawg converter cap runs a little rich on this stove, which I think is because the cap's in-built riser tube has a smaller internal diameter than the removable one on the Pressgas. That said, the converter cap was custom-built for a British No.12 stove, on which it generates perfect combustion.

    John
     
  2. presscall

    presscall United Kingdom Subscriber

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    A sequel.

    I've been using a borrowed Taylors stove gauge and got around to repairing the gauge that came with the stove.

    This was the original you'll remember: no indicator needle, no glass, slightly mauled innards ...

    1425159406-49.JPG


    ... and little remaining of the dial face

    1425159531-51.JPG


    There was just enough to go on. Some key clues from the traces of paint on the dial face: units of measurement were kg/sq cm, the dial carried the functional description 'Manometer' and the maximum reading was 3 kg/sq cm. - which approximates to 3 bars or around 45 psi.

    I handed the task to a graphics artist friend who spent a half-hour on his Mac to produce these

    1425159851-IMGP1829.JPG

    1425159869-IMGP1830.JPG


    I asked him to print the dial faces on heavy-weight paper. I could have gone for laser decal paper but whereas a decal is essential for laying on a surface where the thinness of the decal is crucial, in this application that didn't matter and paper would be easier to apply to the metal dial plate, was cheaper and had the semi-matt finish I wanted rather than the glaze of the decal paper I have in stock.

    Next job, making a new needle. I silbrazed a length of fine-bore brass tube (for the pivot shaft) to a length of fine-gauge brass rod (for the needle)

    1425160520-IMGP1820.JPG


    Tricky work with a Dremel, but a needle and pivot shaft resulted

    1425160531-IMGP1822.JPG


    I fitted it to the gauge and tweaked the bourdon tube mechanism to respond the right amount to a known level of pressure from an air compressor. I wouldn't claim this to amount to accurate calibration but then it didn't need to be, somewhere around 1 kg/sq cm of air pressure in the tank is enough for fierce maximum heat setting if required

    1425161182-IMGP1826.JPG



    Gauge reassembled with new sight glass and ready to reunite with the stove

    1425160564-IMGP1835.JPG

    1425160733-IMGP1833.JPG


    Taylors gauge removed and put back into store, original gauge for the stove back in place

    1425161236-IMGP1837.JPG


    Pressurised, ready to fire up for a celebratory brew, project finished

    1425161254-IMGP1838.JPG
     
    Last edited by a moderator: Jun 26, 2015
  3. The Bird

    The Bird New Zealand Subscriber

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    John,

    I sooooo envy your abilities!!!

    Myself, I'm a natural bungler, and really shouldn't be permitted any interaction with anything combustible.

    Every post is a wonder to behold, many thanks for sharing.

    Best regards,

    Mike.
     
  4. kerophile

    kerophile United Kingdom Subscriber

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    Hi John, Great work on this particular fiddly restoration.
    Best Regards,
    Kerophile.
     
  5. Longilily

    Longilily United Kingdom Subscriber

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  6. shagratork

    shagratork United Kingdom Moderator Subscriber

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    As good as new. :D
     
  7. loco7stove

    loco7stove United Kingdom Subscriber

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    Hi John

    I need say no more than "SUPERB" 8) :clap: :clap: :clap: :mrgreen: :thumbup:

    Stu :mrgreen:
     
  8. keeper_of_the_flame France

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    excellent work on the gauge, John. The stove looks better than new. :clap: :clap: :clap:

    Peter
     
  9. gieorgijewski

    gieorgijewski Turkey Subscriber

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    petroblitz.jpg
    PETROBLITZ
     
  10. presscall

    presscall United Kingdom Subscriber

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    Good the decal's still intact on that one @gieorgijewski

    The double-burner example I provided THIS link for at the start of the thread appears not to have.
     
  11. gieorgijewski

    gieorgijewski Turkey Subscriber

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    I like decals...
    You like decals...
    ------------
    EVERYONE LIKES THE DECALS
    :))
     
  12. presscall

    presscall United Kingdom Subscriber

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