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That is true, didn't think of this. I should probably stick with 1,14*D2*RPM

I now went a little bit further and developed an equation for "gas volume per minute" for any given piston diameter for this case scenario. Vcmf(D,RPM) = 1,1434241355938155786971828180212*D2*RPM = 1,1434*D2*RPM where D is piston diameter in inches.

Good morning! Wow, I did not expect that someone will give so much help to a stranger on the internet. Thank You so much! I really appreciate Your time spent on this. Any way I can give back to You? (tipjar, anything?) After going through the spreadsheet, I now understand how the calculations...

Thank You for the explanation. I can't operate with numbers. I have to come up with the equation that gives SCFM as an output. The client wants to change cold ends from 1,625" to 1,25" on 901-01966 ICP-200 pump. It seemed logical to me that this will change SCFM output. However, the equation...

So it does for me. I have no idea how he came up with this and he is no longer working here. I'll try to contact him and see what he responds. In the meantime I know that one can obtain CMF with this equation: CMF = (CID*RPM*VE)/3456, where: CID: Engines displacement(in^3) VE: volumetric...

Hi again, I found out that the value I'm looking for is not exactly the volumetric flow rate... [conehead] The value I want to find is SCFM (Standard Cubic Feet Minute), which is not the same as volumetric flow rate, as I first thought. SCFM is not dependant on either temperature or pressure...

General Specs of the Pump: Pump rotation: Bi-directional Stroke: 1,375" Max pump speed: 1200 RPM Max power output: 200HP Cold End bore size: 1,25" Max discharge pressure: 15000psi On the datasheet for vaporizor used, it states that: - Gas ρ = 0,072 lb/ft3 - Specific volume = 13,8889 ft3/lb -...

Hi, I'm wondering how You can calculate volumetric flow rate (SCFM=ft2/min) without rotameter installed. We need to change from 1,625" to 1,25" Cold End. This will change the volumetric flow rate. Liquid nitrogen is pumped by a hydraulic pump to a vaporizor. How can I calculate gasses...

Hi Jacob! Thank You for the reply. Do You have the answer to any of 7 questions stated above?

Hi, I'm a graduate Mechanical Engineer and currently working on design of finned-tube heat exchanger. (Liquid cooling exhaust gases from diesel engine.) I found some pre-planning calculations that my previous co-worker did. After reading about heat exchange, I re-arranged and defined some more...