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Can rotary pump draw from a non pressurized source

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  • Can rotary pump draw from a non pressurized source

    Hi cser just wanted to find other alternative to plumb in
    a machine e.g 20ltr bottle water ??? ive read different article stating yes and no.

    Some also recommend buying a jetflo pump.

  • #2
    Re: Can rotary pump draw from a non pressurized source

    I cant see why not.
    Others may have a different opinion though.

    Comment


    • #3
      Re: Can rotary pump draw from a non pressurized source

      No problem, if the machine has an autofill circuit which runs the pump when needed. There were a great many espresso machines at MICE last weekend doing just that in what is essentially an oversized tent.

      A one way valve on the hose that is in the water reservoir will prevent the water draining out of the lines and keep the pump drawing properly.

      Youll also have to make an adjustment to the pump bleed screw, as the mains pressure provides a baseline 2-3 bar for extraction.

      Comment


      • #4
        Re: Can rotary pump draw from a non pressurized source

        I am also considering doing this: I have several commercial levers and now an e61 machine that I need to be able to test. The lever machines do not require a pump- but water should be delivered to them at more than 2 Bar of pressure. Is there an off the shelf product that can suit? or can anyone point me to more information?

        Comment


        • #5
          Re: Can rotary pump draw from a non pressurized source

          Originally posted by 253924243338223F3837353930303333560 link=1336561827/3#3 date=1336622598
          Is there an off the shelf product that can suit?
          There is but I cannot think of its name at the moment.

          It might have been Genovese that used one at a trade show I was at a few years ago (Im seeing dark red), it was some sort of flow switch that turned a watertank mounted pump on when water was drawn.

          Not much help except to let you know they do exist so you can continue looking.


          Originally posted by 343F3134233A3A2F560 link=1336561827/0#0 date=1336561827
          20ltr bottle water ???
          Most good rotary pumps that Ive used will happily draw from a "neverfail" water bottle under the table at an outdoor event. From memory they all would have been fairly standard procon commercial pumps and the only problem I ever had was on an old Beoma that didnt know the boiler was full because the water was too clean... I added some tap water to the container and it was happy or the rest of the day.

          Comment


          • #6
            Re: Can rotary pump draw from a non pressurized source

            Flojet in the states, but there is a local product available. Ill try to dig up some info tomorrow.

            Comment


            • #7
              Re: Can rotary pump draw from a non pressurized source

              I talked to a couple of sponsers today and wayne the technician from coffee roaster australia comfirmed to me that the izzo alex duette ii was fine to run it off a bottle of water and did not require a flojet pump and just needed a one way valve also stated by rick.
              thanks chris from talk coffee and everyone here for pointing me in the right direction. Saved me some BIG $$$ from investing in a jetflo i didnt need ;D ;D ;D

              Louis

              Comment


              • #8
                Re: Can rotary pump draw from a non pressurized source

                Originally posted by 747F7174637A7A6F160 link=1336561827/6#6 date=1336650536
                I talked to a couple of sponsers today and wayne the technician from coffee roaster australia comfirmed to me that the izzo alex duette ii was fine to run it off a bottle of water and did not require a flojet pump and just needed a one way valve also stated by rick.
                thanks chris from talk coffee and everyone here for pointing me in the right direction. Saved me some BIG $$$ from investing in a jetflo i didnt need ;D ;D ;D

                Louis
                Love how we can all work as a team to get a great outcome!  8-)

                One thing I mentioned to Louis is that at home, we need to keep fresh water in mind. Although a big container of water might be convenient, it will also become somewhat "flat" before its all consumed.

                I guess its all a matter of finding the right balance

                Comment


                • #9
                  Re: Can rotary pump draw from a non pressurized source

                  That very true Chris, just check on the brita web site today and they recommend 48hr on filter water before it goes flat...

                  Thanks for the tips Chris will make sure i find the perfect balance. At this stage i mite not even need a bottle of water i think the tank itself mite do just fine and just have a empty bottle for the drip tray.

                  Comment


                  • #10
                    Re: Can rotary pump draw from a non pressurized source

                    I have some more questions guys: I have an RO water filter system that I use for drinking water at home.

                    I need to set up flojet type water supply for my various commercial machines. The Levers need the water to be delivered to them at 1.6 BAR or higher pressure. Not sure about the Faema e61? Can anyone point to me to a Sponsor who could put together a mobile bottle and pump system to suit me?

                    If possible I would like to incorporate my RO filter system.... otherwise I will just use it to fill my bottles.

                    Comment


                    • #11
                      Re: Can rotary pump draw from a non pressurized source

                      Originally posted by 776B7676616A706D6A65676B62626161040 link=1336561827/9#9 date=1336710150
                      I have some more questions guys: I have an RO water filter system that I use for drinking water at home.

                      I need to set up flojet type water supply for my various commercial machines. The Levers need the water to be delivered to them at 1.6 BAR or higher pressure. Not sure about the Faema e61? Can anyone point to me to a Sponsor who could put together a mobile bottle and pump system to suit me?

                      If possible I would like to incorporate my RO filter system.... otherwise I will just use it to fill my bottles.
                      Hi Jack,

                      You will need to remineralise that RO...

                      Your faema will have a pump, so you could run from a large bottle with a non-return valve fitted to the inlet. Normally, mains pressure would be controlled by a 350 kPa PLV. This wont be required if running from a container. You will need to adjust the bypass on the pump to deliver 9 bar at the group regardless of the water source.

                      My levers are connected to a filter and PLV and are happy with 3.5bar.

                      Chris

                      Comment


                      • #12
                        Re: Can rotary pump draw from a non pressurized source

                        Originally posted by 445845455259435E5956545851515252370 link=1336561827/9#9 date=1336710150
                        Can anyone point to me to a Sponsor who could put together a mobile bottle and pump system to suit me?
                        First place I would call is 9Bar Espresso
                        ...they have an office in Adelaide so also close to you too.

                        9Bar
                        113 Melbourne St,
                        North Adelaide.

                        Give Bill a call on 0400 160 336

                        Comment


                        • #13
                          Re: Can rotary pump draw from a non pressurized source

                          thanks Chris and Andy- I will call 9bar- have been meaning to check them out for ages anyway so its time...

                          Chris- why are minerals important for espresso? Genuinely curious. I have been filling my Ponte Vecchio with filtered water from the RO system and it seems OK- I didnt notice any problem. I have heard some people think RO water is bad because it is so pure: purer than water found in nature. But I have heard others say that if that was true rain water would be bad for humans- and it isnt so RO water is OK too.... I didnt read beyond that point and just kept drinking the RO water- which is great as far as I can tell.

                          Comment


                          • #14
                            Re: Can rotary pump draw from a non pressurized source

                            Water, in its purest form, is a solvent, it binds with everything, including leeching the metals out of your boiler.

                            while its unlikely that your RO has done damage in the short time youve used it, Over time you are likely to end up with a boiler that has been compromised because various compounds in the alloy have been leached out quicker then others leaving little pinholes and microcracks. :-/


                            Originally posted by 465A4747505B415C5B54565A53535050350 link=1336561827/12#12 date=1336723822
                            thanks Chris and Andy- I will call 9bar- have been meaning to check them out for ages anyway so its time...

                            Chris- why are minerals important for espresso? Genuinely curious. I have been filling my Ponte Vecchio with filtered water from the RO system and it seems OK- I didnt notice any problem. I have heard some people think RO water is bad because it is so pure: purer than water found in nature. But I have heard others say that if that was true rain water would be bad for humans- and it isnt so RO water is OK too.... I didnt read beyond that point and just kept drinking the RO water- which is great as far as I can tell.

                            Comment


                            • #15
                              Re: Can rotary pump draw from a non pressurized source

                              Originally posted by 6A766B6B7C776D7077787A767F7F7C7C190 link=1336561827/12#12 date=1336723822
                              Chris- why are minerals important for espresso? Genuinely curious. I have been filling my Ponte Vecchio with filtered water from the RO system and it seems OK- I didnt notice any problem. I have heard some people think RO water is bad because it is so pure..
                              Gday Jack. Machines with autofill circuits rely on conductivity of water via dissolved solids or ionic content. Apart from the comments above, we see overfills and other faults with RO.

                              Chris


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