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Looking for a DSR regulator to build?

Discussion in 'CO2 Enrichment' started by Matt F., May 26, 2011.

  1. Matt F.

    Matt F. Lifetime Charter Member
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    For all you wanting to buy a dual stage regulator, I hope this helps. Save money and DIY!
    http://cgi.ebay.com/8-Matheson-3000-PSI-2-Way-Gas-Pressure-Regulator-/140516355176?pt=LH_DefaultDomain_0&hash=item20b76d6c68
    http://cgi.ebay.com/MATHESON-MODEL-8-GAS-REGULATOR-MAX-PSIG-3000-/330527762415?pt=LH_DefaultDomain_0&hash=item4cf4fd67ef
    http://cgi.ebay.com/MATHESON-GAS-CYLINDER-REGULATOR-8-320-/120727939798?pt=LH_DefaultDomain_0&hash=item1c1bf22ad6
    http://cgi.ebay.com/8-Matheson-3000-PSI-2-Way-Gas-Pressure-Regulator-/140518374949?pt=LH_DefaultDomain_0&hash=item20b78c3e25
    http://cgi.ebay.com/EXCELLENT-MATHESON-GAS-REGULATOR-CONTROL-MODEL-8L-/160546463617?pt=LH_DefaultDomain_0&hash=item2561509f81
    http://cgi.ebay.com/MATHESON-GAS-REGULATOR-MODEL-8-580-/270672357785?pt=LH_DefaultDomain_0&hash=item3f05546999
    http://cgi.ebay.com/Matheson-Gas-Regulator-Model-3104-580-3000-Psi-/270752183756?pt=LH_DefaultDomain_0&hash=item3f0a1675cc
    http://cgi.ebay.com/Matheson-Gas-Regulator-Model-3104C-3000-Psi-/270752182656?pt=LH_DefaultDomain_0&hash=item3f0a167180
    http://cgi.ebay.com/MATHESON-3104C-580-GAS-REGULATOR-3000-INLET-PRESSURE-1-/150501635763?pt=LH_DefaultDomain_0&hash=item230a98b6b3
    http://cgi.ebay.com/Matheson-3104-580-Gas-Pressure-Regulator-Valve-3000PSI-/200604979180?pt=LH_DefaultDomain_0&hash=item2eb4fd0fec
    http://cgi.ebay.com/Matheson-8-580-Gas-Regulator-/360367508703?pt=LH_DefaultDomain_0&hash=item53e793ccdf
    http://cgi.ebay.com/Victor-Equipment-Co-Gas-Regulator-/330567083165?pt=LH_DefaultDomain_0&hash=item4cf755649d
    http://cgi.ebay.com/Victor-Inert-Gas-Welding-Regulator-VTS250D-/220788628179?pt=LH_DefaultDomain_0&hash=item3368071ad3
    http://cgi.ebay.com/AGA-COMPRESSED-GAS-REGULATOR-MODEL-GTP-27OD-JA32148-/370288192609?pt=LH_DefaultDomain_0&hash=item5636e56c61
    http://cgi.ebay.com/High-Purity-Compressed-Gas-Regulator-GPL270E-250-1882-N-/260789365133?pt=LH_DefaultDomain_0&hash=item3cb841e98d
    http://cgi.ebay.com/OSC-Model-HPT-270A-Gas-Regulator-Air-Nitrogen-Crome-/120728790534?pt=LH_DefaultDomain_0&hash=item1c1bff2606
    http://cgi.ebay.com/AGA-Gas-Regulator-Type-CB-200-2-6C-250-3000-4-85-PSI-/230623326978?pt=LH_DefaultDomain_0&hash=item35b238b302
    http://cgi.ebay.com/Linde-Gas-Regulator-Type-CS-200-2-3B-250-3000-3-45-PSI-/290567066131?pt=LH_DefaultDomain_0&hash=item43a7259213
    http://cgi.ebay.com/Linde-Gas-Regulator-Type-791529-3000-PSI-0-15-PSI-/290567066101?pt=LH_DefaultDomain_0&hash=item43a72591f5
    http://cgi.ebay.com/AIRPRODUCT-MODEL-E12-244D-GAS-REGULATOR-MAX-PSI-3000-/150501584151?pt=LH_DefaultDomain_0&hash=item230a97ed17
    http://cgi.ebay.com/ALLTECH-MODEL-2123351580-GAS-CYLENDER-REGULATOR-/150501641276?pt=LH_DefaultDomain_0&hash=item230a98cc3c
    http://cgi.ebay.com/AIRGAS-4321331-000-COMPRESSED-GAS-REGULATOR-4000PSI-MAX-/190529573076?pt=LH_DefaultDomain_0&hash=item2c5c7290d4
    http://cgi.ebay.com/VWR-Scientific-55850-420-Compressed-Gas-Regulator-/300456725049?pt=LH_DefaultDomain_2&hash=item45f49dca39
    http://cgi.ebay.com/PRAXAIR-4123341-580-COMPRESSED-GAS-REGULATOR-4000PSI-/150600409228?pt=LH_DefaultDomain_0&hash=item23107be08c
    http://cgi.ebay.com/VWR-55850-482-Carbon-Dioxide-Multi-Stage-Gas-Regulator-/160583535164?pt=LH_DefaultDomain_0&hash=item2563864a3c
    http://cgi.ebay.com/PRAXAIR-4124341-580-COMPRESSED-GAS-REGULATOR-4000-PSI-/190529573081?pt=LH_DefaultDomain_0&hash=item2c5c7290d9
    http://cgi.ebay.com/PRAXAIR-4122331-01-580-COMPRESSED-GAS-REGULATOR-4000PSI-/190534184588?pt=LH_DefaultDomain_0&hash=item2c5cb8ee8c
     
  2. maknwar

    maknwar Lifetime Members
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    The mathesons are great regulators. I have two and they are solid. Just remember to check if they need fine threaded cga 320 stems.
     
  3. Matt F.

    Matt F. Lifetime Charter Member
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    Most of the older Harris built regulators (Model 8s, etc.) need the fine threaded CGA nipple/stem.

    Here is what I initially wrote on my experience (with the help of others):
    As some of you know, I recently aquired a like-new Matheson Model 8-580. Thanks to the help of S&KGray at Barr's site, I was educated that I needed a fine thread CGA nipple, not the standard 1/4" npt that Victors and other regulators use.

    According to my Jim at Regulator and Torch Repair, Matheson Model8s are made by Harris, who uses a strange inlet port thread. The output on these Mathesons is 1/4 npt, so you don't have to worry about post body kits.

    Here is the link for the correct part:
    http://www.regulatortorchrepair.com/store.php/products/cga-320ft-nut-and-nipple

    You can also order them from Western Enterprises via Airgas: part number CO-7 (thanks again to S&KGray for the part number)

    You use a regular CGA 320 nut with this fine thread nipple.
    Below are some pics.

    The difference between 1/4" npt and the 1/2" 27 thread:
    [​IMG]

    [​IMG]

    Here is the old CGA 580 next to the new CGA 320
    [​IMG]

    Here is the new CGA 320 installed on the Matheson Model 8-580
    [​IMG]
     
  4. maknwar

    maknwar Lifetime Members
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    The stems are about $20 too, so include that into the build price. Worth it IMO cause you can get a matheson DSR for cheap.
     
  5. Left C

    Left C Lifetime Members
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    Matheson has a very good line of two stage regulators. I'm only familiar with the 8-320 which is one of their tri-gas models of which the CGA-320 model is one of them. There is one for inert gas with a CGA-580 fitting. I waited until one with the CGA-320 fitting came along and purchased it.
     
  6. Matt F.

    Matt F. Lifetime Charter Member
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    Also the 3104C is nice...I think Fordtrannyman had one. I think it's the high purity version of the Model 8.
    I think the Matheson 3100 or 3800 series is stainless steel (forgot which one) like the SGTxxx series for corrosive/toxic gasses.
     
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