Recent content by lotus7312

Thank you all for your reply. I am initially looking for a template which I could follow. I guess there is no such template that I can follow exatly, except some guidlines. Again, thank you for all your help.

Hi, We are constructing a new pharmarceutical facility now. I was ask to come up a master validation plan. Can someone give me some guildance or example plan? What items should I check for buildings, utilities and HVAC system? Many thanks

We are designing a purified water system with one stage RO. One article about RO system said the pH of the water inlet to RO has to be adjusted to above 8.3. The reason is there will be only HCO3- and CO32- ions in the water, and not CO2 gas since RO can not reject CO2 gas. Does anyone use RO...

Hi, all, Do you have any idea that the minimum temperature of the water outlet that a cooling tower(natural draft/mechanical draft) can reach? Thanks

MJCronin, It is not due to the temperature, it is due to the pressure. We want to heat the reactor at a high temp(say 250 degC), but then the reactor jacket should be able to stand high pressure if steam is used. A reactor with high pressure rating is really costy. Plus we have some experience...

Hi, unclesyd, Thank you for your reply. Is it possible for you to post a process flow chart on your system? Do you have individual heating/cooling package for each of your rotary dryer? If it is true, do you install an expansion tank in each system? Thanks Thanks

Hi, all, We plan to build a hot oil boiler to heat all the reactors in our plant. Due to the different temperature requirement of individual reactor, someone in our company brough up the following design: 1. Feed a medium(say kind of oil) in the reactor jacket 2. Install a sort of...

Hi, all, My boss said that somebody told him that if a water ring vacuum pump was installed in a high position(say, on the roof of the plant), then you can get better vacuum. Did anyone hear about this? Is there any theory or logic behind this? Thanks

Dear all, I have one project to get a better control for a vessel during heating/cooling. There are steam and water line for this vessel. Currently,steam is on for a few minites to reach to certain temperature. Then open water vavel and crack steam valve to maintain the target temperature. My...

Thank you for the answer. This sentence is written on the spec sheet for one controller. Baldor, How did you get 420mA for 120V and 210mA for 240?

Hi, all, Can anyone explain the sentence below? Inductive load: 50VA @120VAC OR 240VAC What if the voltage is 220VAC? THANKS

Dear all, I have a solenoid valve with 220V/50Hz. Can I use a controller with on-off control relay to operate this solenoid valve? Thank you

Dear all, Can anyone tell me what is the meaning of (class F coil with 18" lead)? Is there any other class of coil? What is their major difference? Thanks a lot

Saxon, Thanks a lot. That is really helpful. lotus

All, Thank you for your input. Saxon, Can you explain the function and principle of powered pumping traps? I never used it before. Thanks