tjansen Posted July 21, 2020 Share Posted July 21, 2020 Hello, I am looking to buy a pressure tank, and I would like to know the cutoff pressure of my pump. It is a Mitsubishi EP-305Q5, photo attached. The nameplate is in Thai, and I think the On Pressure is 2.2 kg / cm2, which I believe is around 30 psig. I don't see anything that looks like it might be the cutoff pressure. I am thinking it should be something like 50 psig, or around 1.65X2.2 kg / cm2 or around 3.5 kg / cm2. I don't see anything on the name plate that is close to that number. I am trying to learn how to size a tank, and I am thinking I need both cut-in and cut-out pressure, especially for any safety pop-off. Thanks for any help. Link to comment Share on other sites More sharing options...
NanLaew Posted July 21, 2020 Share Posted July 21, 2020 (edited) https://www.lazada.co.th/products/accumulator-mitsubishi-al-100-gas-pressure-20kgf-02mpa-ep105-ep155-ep205-ep255-ep305-i1128918209-s2601418320.html https://www.lazada.co.th/products/mitsubishi-ep-1205-305-i282817021-s460288282.html? Edited July 21, 2020 by NanLaew Link to comment Share on other sites More sharing options...
chickenslegs Posted July 21, 2020 Share Posted July 21, 2020 Does this help Link to comment Share on other sites More sharing options...
Metropolitian Posted July 21, 2020 Share Posted July 21, 2020 2.1 and 2.8 for the Q5 as yours is and 2.4 and 3.0 Kg/Cm2 for the R version of the EP-305 Some information: (And service manual as attachment in this post) HP_SM_Q5_Series_2016.pdf Link to comment Share on other sites More sharing options...
Metropolitian Posted July 21, 2020 Share Posted July 21, 2020 And to interpret the nameplate.. Mitsubishi Electric Model: EP-305Q5 S/N: 60507718 Date of production: May 31th, 2016 Voltage: 220 Volt Freq: 50 hz Power: 300 watt Switch turns on pressure at 2.2 kg/cm2 Pumping power > 4 liter / minute Suction distance 8 meter Pushing distance 20 meter Transportation flow to reach 14 meter distance , 45.94 liter/min Transportation flow at 2 meter distance 50 liter/min Pipe diameter 25 mm (1 inch) Then some address information from the company Mitsubishi at the Bangna-Trat rd. in Bangpli and phone numbers. 1 Link to comment Share on other sites More sharing options...
tjansen Posted August 4, 2020 Author Share Posted August 4, 2020 Thanks very much for all the replies. Sorry about the late response. I was waiting for email notification that there were replies, but I had an obsolete email address in my profile. Yes, this is what I was looking for, from the chart from Chickenslegs and from Metropolitan. 2.1 and 2.8. My nameplate says 2.2 for cut-in and no info for cutout. That is close enough to buy a tank. The info was probably in the other two posts as well. So, thanks to all. Tom Jansen Link to comment Share on other sites More sharing options...
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