Pressure & Flow - Reciprocating pneumatic piston pump - Help!
Pressure & Flow - Reciprocating pneumatic piston pump - Help!
(OP)
Hi Team,
I'm going to try and keep this as short as possible (solve one problem at a time).
I'm trying to choose a reciprocating pneumatic piston pump to suit my application -pumping automotive fluids from a storage tank to a hose reel & dispenser out of a metered dispenser.
The main thing i'm struggling with is the pump performance charts. I've read through this from Graco (Pages 26 & 27 of the PDF or 24 & 25 of the document) - Link
I don't understand why when the flow rate goes up while the outlet pressure required drops (it's the same with all the pump of the same type not jsut htis example)- I understand this may have something to do with boyles law, but I can't find anything that explains how to apply it do a dynamic system.
Another contribution to my confusion - When you compare it to double diaphragm pumps they are the opposite - Link. I would use one of these but the calculated pressure loss is too high in the system :(
Any links or help appreciated. Feel free to roast me if i'm missing something simple :)
I'm going to try and keep this as short as possible (solve one problem at a time).
I'm trying to choose a reciprocating pneumatic piston pump to suit my application -pumping automotive fluids from a storage tank to a hose reel & dispenser out of a metered dispenser.
The main thing i'm struggling with is the pump performance charts. I've read through this from Graco (Pages 26 & 27 of the PDF or 24 & 25 of the document) - Link
I don't understand why when the flow rate goes up while the outlet pressure required drops (it's the same with all the pump of the same type not jsut htis example)- I understand this may have something to do with boyles law, but I can't find anything that explains how to apply it do a dynamic system.
Another contribution to my confusion - When you compare it to double diaphragm pumps they are the opposite - Link. I would use one of these but the calculated pressure loss is too high in the system :(
Any links or help appreciated. Feel free to roast me if i'm missing something simple :)





RE: Pressure & Flow - Reciprocating pneumatic piston pump - Help!
je suis charlie
RE: Pressure & Flow - Reciprocating pneumatic piston pump - Help!
Now for part 2.
Is my thinking process correct?
Would I be correct in saying that one of the ways I could find the max flow is to use the SCFM & the air pressure (it can be regulator to suit specs) of the air compressor to give me my max fluid flow which I can use the performance chart to give me the fluid pressure?
If the above is correct do I then work out my pressure loss in the system and take that from the pump fluid pressure and as long as that is a positive number we'll get our max flow?
Or is there an extra step i need to do to work out actual flow taking into account the pressure loss?