The machine is an Expobar dual boiler I recently picked up. It has been disassembled cleaned, reassembled with new gasket and pressure adjusted to 9 bar at the group with a pressure gauge fixed to the porterfilter.
What I have found is that the flow seems to be low, a 20 sec collection of water from the unrestricted group is 100ml. Which is about 5ml per second.
I find the shots are taking about 10 seconds for first drips and finishing about 25-30 seconds depending on the beans.
Is this flow low?
What is the general unrestricted flow rate from a machine set to 9 bar?
I have checked the little jet/nozzle in the E 61 group and it is not clogged nor is the filter screen.
What I have found is that the flow seems to be low, a 20 sec collection of water from the unrestricted group is 100ml. Which is about 5ml per second.
I find the shots are taking about 10 seconds for first drips and finishing about 25-30 seconds depending on the beans.
Is this flow low?
What is the general unrestricted flow rate from a machine set to 9 bar?
I have checked the little jet/nozzle in the E 61 group and it is not clogged nor is the filter screen.

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