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I HAVE A 100 HP YASKAWA VFD THAT RUNS A 100 HP MOTOR FOR WATER PUMPING PURPOSES. WE JUST PUT THIS DRIVE ON LINE AND WAS RUNNING AT APPROXIMATELY THE SAME SPEED (ABOUT 54 HZ)FOR 2 DAYS. THERE WERE NO LOAD CHANGES IN THE SYSTEM (MAJOR). THE VFD TRIPPED AND A "INV OVERLOADED FAULT" CAME UP. ANY...

I will need to coat the inside of a vessel operating under vacuum. The protection required is for HCL (Hydrochloric acid) and temperatures to around 300 F. Does any body have a recommendation for the coating to use for this application. The vessel surface to be coated is Stainless Steel. Any...

Does anyone know where I can find some reference that may have some equations relating the steam nozzle area and the diffuser throat area. I know that the performance of an ejector (steam) is a fuction of the ratio of diffuser throat area to steam nozzle area. Of course it is also a function of...

Thank you Dracula

I'm trying to determine the amount of water flow I will need to cool a heated platen (350 to 70 deg) in 1 hour. The platen is made of stainless steel and is 48" by 48" by 4" thick. Water flows inside the platens. Any help on equations that apply will be appreciated.

Thank you for all your suggestions

NEED TO TAKE SOME CORE SAMPLES OF A CONDENSATE SUMP WALL FOR CONCRETE TESTING PURPOSES. THE SUMP CONTAINS CONDENSATED STEAM MIXED WITH SOME HYDROCARBONS. WHAT WOULD BE THE BEST AND QUICKEST WAY TO REPAIR OR PATCH THE HOLES?? IF NEGATIVE RESULTS ARE OBTAINED FROM CONCRETE TESTING (COMPRESSIVE...

Look at the "HEAT EXCHANGE INSTITUTE" Standards for Steam Jet Vacuum systems. It has a lot of information on designing steam jet vacuum systems.

We are currently considering a carbonization run on an induction heated furnace. The process gas is Nitrogen flowing at approximately 200 SCFH. One of the most significant byproducts is Hydrogen Cyanide HCN. I'm looking for the best method to destroy HCN. If an incinerator or thermal oxydizer...

I'm planning to upgrade an existing automotive repair shop by building the lateral walls, office and restroom with cement block. I'm planning to use corrugated sheet metal on roof. Are there any, besides local code requirements, general guidelines on ventilation, roof, walls, floors, plumbing...

I NEED TO DESIGN A FOUNDATION FOR A 60 TON HYDRAULIC PRESS USED FOR CUTTUNG FABRIC SHEETS. TO TOTAL WEIGHT OF THE MACHINE IS 17,000 LBS. ARE THERE ANY GUIDE LINES ON DESIGNING THIS TYPE FOUNDATIONS. CAN ANYBODY GIVE ME A RECOMMENDATION ON HOW TO APPROACH THIS PROJECT. YOUR HELP WILL BE...