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My DIY Scace

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  • My DIY Scace

    for a bit of fun and because i scored a suitable pressure gauge for free , i have made up my own scace.

    The scace is built onto a backflush disk which fits into a blind portafilter: it can be removed from the portafilter when done and easily re fitted.

    The hardest part was making a bleed system; in the end i have a 1/4" bolt drilled and tapped with a 3mm bolt which can be loosened or tightened to allow the required flow.

    I adjusted it to give 30ml in 20 seconds ( flow rate 1/2 way between a single and double shot)

    I also have access to calibration so calibrated the gauge to 135psi (9 bar) so i know its accurate to about 1%.

    I've used it to calibrate my Izzo Alex and the good news is the gauge on the Izzo is exactly on 9 bar after calibration. I needed to do this becuase Chris calibrates them using tank water feed and in the plumbed in setup you have additional pressure.

    Interested in any feedback- have i missed anything?
    Attached Files

  • #2
    Temperature! Without a temp probe of some sort this is not a 'scace' or anything resembling one, but its a bloody nice pressure test device. Love that huge calibrated gauge!

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    • #3
      yeah its a Wika 0-500psi reference Gauge which they had to give us when they shipped us some dodgy transducers ( long time ago mind you- good product). Straight out of Batman's Batcave. full NATA certification.

      Temp sensing i might address later but it aint that simple as bunging a probe in there.

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      • #4
        Incidentally and slightly OT, sorry, I've been trying to find a source for Wika gauges in melbourne / Oz generally. Any ideas?

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        • #5
          Originally posted by coffee_machinist View Post
          Incidentally and slightly OT, sorry, I've been trying to find a source for Wika gauges in melbourne / Oz generally. Any ideas?
          ->>> Buy Analogue Positive Pressure Gauges Pressure,gauge,50mm,bottom entry,R1/8,1.6 bar/psi WIKA 7833926 online from RS for next day delivery.

          edit

          and here ->>>http://www.wika.com.au/contact_distr...ActiveID=22922
          Last edited by alittlewino; 8 February 2013, 07:47 PM. Reason: added link

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          • #6
            Originally posted by coffee_machinist View Post
            Incidentally and slightly OT, sorry, I've been trying to find a source for Wika gauges in melbourne / Oz generally. Any ideas?
            just posted a couple of links for you and they were there for a while and now have disappeared??????

            google Wika aus and you'll find the info you need or RS electronics and Blackwoods sell their gauges - no association with either/any/nada

            this thread and a little more reading got motivated to do the volumetric check on my Silvia Ver 1 and find that on volume the pressure is way too high 150ml/min or 12 bar!!

            just put in a copper washer and got 280ml - now to re-learn everything all over again - always wondered why my grind was near the bottom limit of the Rocky

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            • #7
              We have an oem deal with wika they do have a Melbourne office , but their sales contact is in sydney. See their website in contacts section.

              They have an amazing range of stuff it's cherman so it must be gut!

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              • #8
                so good even the Swiss use German gauges! Thanks all, Blackwoods seem to have what I want. 40 mm side entry plastic housing in a range of kPA. Win.

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