Has anyone been involved in a project where the limits on a VFD were set above 60 Hz in order to get the pump to increase RPM's and maximum flowrate? Pumps in question are submersible 125 horsepower, 460 volt and operate on VFD's. I've never seen this done and it doesn't seem to be an industry...
Can the flow direction on this type of globe valve be in either direction? The service is liquid oxygen with this valve located on the upstream side of the liquid oxygen vaporizers. There is a flow arrow on the side of the valve, but why would it matter if the flow is pushing up on the disc or...
Our project has a 316L stainless steel pressure vessel, 48" diameter with ASME F&D heads that operates under 30 psig. The engineered spec indicates that the vessel is to have a Bright 2B Finish. Question: is the "Bright" 2B finish something performed at the steel mill or is this something...
What is the purpose of having to install a Power Factor Correction Capacitor locally at a pump? I have never seen one before. Pump is 7.5 HP / 460 volt/3 phase/60 / 10.1 FLA. This pump is within a typical plant feed from the Motor Control Center.
I received a copy of a project on CD with over 500 drawings along with the Xref files for use in construction, however, when I open the drawings on my computer I only see a partial of the drawing. I can manually edit each drawing Xref path, so that it finds the Xref drawing on the CD in oder to...
Was wondering if anyone could refer me to a good website or book that provides a practical guide to reading and understanding one line diagrams and control diagrams. The application would be in industrial plants dealing with motor controls for pumps, valves, meters, instrumentation, etc.
I'm looking at installing 3 stand alone MCC panels in an existing small room at a process plant. They measure 2.5 feet wide and vary between 16 to 24 feet long: controls for about 30 motors with 3 VFD's. Access is only through a doorway. My questions are: 1) are the units normally shipped in...
