Hi snobs,
In the quest to improve the espresso coming from my Silvia, I want to test the pressure and adjust the over pressure valve if necessary. There are some commercial portafilter-fitted pressure gauges that are not too expensive, but I have a question about their function.
The commercial gauges don't appear to allow any water to flow through. An alternative would be to assemble a T-piece coming off the pf, with a drain valve on one side and a gauge on the other. One could then adjust the drain valve to allow about 1-1.5ml/s of water out (roughly a good espresso flow rate), and check the pressure at that flow rate.
My question is, does the function of the opv make the flow on the pressure test unnecessary? Will the machine max out at whatever pressure the opv allows, regardless of the flow rate (or lack thereof)?
In the quest to improve the espresso coming from my Silvia, I want to test the pressure and adjust the over pressure valve if necessary. There are some commercial portafilter-fitted pressure gauges that are not too expensive, but I have a question about their function.
The commercial gauges don't appear to allow any water to flow through. An alternative would be to assemble a T-piece coming off the pf, with a drain valve on one side and a gauge on the other. One could then adjust the drain valve to allow about 1-1.5ml/s of water out (roughly a good espresso flow rate), and check the pressure at that flow rate.
My question is, does the function of the opv make the flow on the pressure test unnecessary? Will the machine max out at whatever pressure the opv allows, regardless of the flow rate (or lack thereof)?

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