Recent content by jsearl

Thanks Guys. I appreciate your inputs.

Thankyou Jraef for your reply.

Thanks VE1BLL. Its more the selection of the network architecture hardware I was trying to get a handle on.

Hello Guys and Gals I have been tasked with coming up with a recommendation for which form of communication network to go for in a water process control environment. This would include PLCs' conneted to devices having 4-20mA I/O and digital I/O and conceivably intelligent MCCs' over a site...

I was just wanting to confirm that air trapped at the face of an instrument sensor designed and calibrated to measure water under pressure, would cause an incorrect or unreliable pressure to be recorded. Thanks

Dear GGOSS, Thanks for your time. Regards John

I know I should know this but can anyone just confirm for me please. I have a motor rated at 37.5 kW and it is to be connected for star-delta starting. The nominal motor current is say, 68 amps. Am I right in saying that the cabling from the MCC for the delta connection can be rated for 39...

We have 3no. 2MVA 6.6kV to 415 volt transformers on site and I want to put together an enquiry for a contractor to inspect them and report and then undertake any necessary maintenace on them. What would anybody suggest I ask for in my enquiry (works specification) documents. Thanks in advance...

I have a pump that has a capacity of 1019 l/s at a total head of 24 metres. Will the pump be damaged if I increase the suction head so that the total head is reduced. Is there a "minimum" total head requirement for a centrifugal pump? Also what is the pump "run out&quot...

Thanks for the info. I know I'm probably thick but what is the difference between gauge and absolute pressure and whats the vapour pressure of water? Thanks again

Can anybody advise me how I calculate the value of NPSH? Thanks