First Post here, decided to try to contribute in some small way. Jed is correct the Milton Roy LMI P183-363N3 is not a peristaltic pump. http://www.lmi-pumps.com/datasheets/Pseries-08-01.pdf
I believe that the Manufactures specifications are not clear. I think that the spec is 12.1 l/h at 1.5 Bar (22 psi). My reasoning for this comes from the Manufactures Instruction Manual. http://www.rb-instrument.nl/attachments/458_LMI_P1_serie_ibv_eng.pdf Page 17 under troubleshooting Excessive pump output: "Little or no pressure at injection point. If pressure at injection point is less than 1,5 bar (25 psi), an 4-FV should be installed." If the spec really is 12.1 l/h @ 1.5 Bar then the test that Mat Lewan made during his September test at room presure of 15.8 l/h is completely plausible . There is also a section of the manual that speaks to "CHECKING PUMP FOR PROPER ZEROING (STROKE KNOB)". So it may also be possible that the stroke can be mis-zeroed, and that may also contribute to flow greater than spec. John Page ----- Original Message ----- From: "Jed Rothwell" <jedrothw...@gmail.com> To: vortex-l@eskimo.com Sent: Thursday, October 27, 2011 9:46:46 AM Subject: Re: [Vo]:Making Sense of ECAT Water Pump Flow Rate Colin Hercus wrote: The manufacturers data sheet indicates it has variable rate and variable stroke pump and doesn't indicate that a tube can be replaced or even that it's a peristaltic pump. I believe it is a constant displacement pump, not peristaltic. Peristaltic pumps do not have variable strokes. The rotor goes full circle every time and pushes more fluid up the tube. - Jed
