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.

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, 20205 yr by NanLaew

Does this help

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

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.

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