Recent content by krupnikas

Net Positive Suction Head Available = Pressure on Surface of Liquid + Static Suction Head – (Vapor Pressure + Friction Loss) Where all the terms are in feet of liquid. With the Vessel @ 28” Hg Vacuum and the liquid vapor pressure @ 7.51 PSI Absolute, you would not have any...

This is a distillation unit and the water in the vessel will become vapor as it re-enters the unit. Thanks to everyone for all the inputs. I have also got confirmations from pump vendors that it NPSHa is 7ft based on the scenerio.

Converts to about 21.6ft. Seems way too much. I was coming out with around 7ft. Its the vacuum that that causes me the confussion in the equations.

Looking for confirmation on an NPSHa calculation involving a centrifugal pumping from vacuum vessel. Fluid: Water @ 180 DegF Fluid Density: 0.970 Vapor Pressure @ 180 DegF: 7.51 PSIA Vessel: 28 in Hg Vacuum Approx Friction Losses: 0.5 ft Water Operational level above pump centerline: +7.5 ft

I recently received from my technical rep from Spears a CD containing a technical information program of all Spears components including fittings, valves, flanges etc. It also contained an application for 2D/3D import of these items into the AutoDesk product, but also seemed to have an solid...

I'm looking for a solution for tagging our wastewater piping systems which get broken down prior to shipping and then re-assembled in the field. I envision using some sort of metallic or plastic embossed tags which can be mechanically attached using tie-wraps or similar. Each tag for mating...

Thanks jdarco, I already have them on my list along with Sims Pump in NJ, which makes a composite pump.

Looking for alternative vendors for ANSI style centrifugal pumps with wetted parts made from polyproperlyne and/or PVDF. Conditions currently are for ~650 GPM @ 100 FT of head with low NPSHR, but we have many applications that range upto this flow rate. Any have any reccomendations or success...