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Sorry Kingnero, I've been out of the country the past few days. Many thanks indeed for your efforts, I would have never have got that far.

Thank you for info nuche. I will indeed seek further assistance as it is looking increasingly more complex.

Drawoh, I am an instrumentation engineer but because I work for a small company need to turn my hand to other areas from time to time. I feel that you are being quite patronising in your approach to my request for help. What may seem basic to you, may not to others and if roles where reversed...

Sorry Kingnero, I wouldnt know where to start in drawing an FBD! I understand what they are but not how to construct one. The only info I can offer is the weight of the box (full) = 250 Kg The angle of incline - say 10 degrees The material used to support the box (x2) is 50x50x6 mild steel...

Hi, Yes Parts A,B,C will be bolted to the upright I beam. I know what a free body diagram is but i'mm unsure of how to go about combine/dividing shear force and moment over the bolt group. Any tips would be greatly appreciated. I agree with the 10 degree, we could probably get away with...

Hi, I am trying to design a simple racking system for a small IBC (container that is to hold 250Kg of liquid). The rack it sits on will hold just one box but will need to angle down approx 10 degrees so that the entire contents of the box can be drained. box is 800 wide x 600 deep x 830 high...

They are called Normex fittings I have since discovered. Made by an Irish company called Dairy Tube Engineering. The female pushes into the male, inside which is a special rubber seal (sat inderneath the raised out part). A Loctite 638 retaining compound is smeared on the end of the female...

I have come across these fittings on a buttermilk plant in a bakery in Ireland and have never seen them before. http://i52.tinypic.com/14kw1vn.jpg My first thought is how are they connected (glue, interferance fit, crimped etc???), what sort of pressure they can maintain and also their...

Hi, firstly thanks for the help so far. Secondly an answer to your questions. The HMI is connected directly to the PLC I.e. It isn't PC controlled. It is connected to the Mitsubishi Q series via an ethernet cable, with a seperate power supply providing 24vdc for the screen. The PLC has a GSM...

It cant be connected in parallel as it needs to be viewed from another location, i.e another town. I think the HMI is a Siemens HMI.

Hi, We have a system utilizing a Standard Mitsubishi Q series PLC on a site in Belfast, utilizing a HMI for control of the system by the operator. The system is basically two 25000L tanks of chilled milk that is kept in constant circulation around a ring main and then tapped off as demanded by...

Hi This is the compressor in use, well actually there are two working together. http://www.abac.co.uk/genesis-compressors.htm It is an 11kw - 8 bar model. The dew point is set at 2-3degrees. It comes out of the compressor at this temp and 8 bar, it then travels in an uninsulated standard...

Hi Biginch, Thanks but we can't put air from the fridge into the drier as its is 30m away and will be warmed up again.

Hi, I posted this yesterday but for some reason the thread has disapeared? Anyway, we have a pump that keeps freezing (five or six times a week for 10 - 20 mins) due to moisture in the compressed air. The air line comes from our drier which is very competent and well serviced but then travels...

Hi Qualitytime, we have had flawless changeovers since we stopped the agitator at 1500 litres. I have now written this into the program and all seems well. Many thanks for your help.

Thanks Qualitytime, I completely agree with you. When the mixer is fully into the liquid, there are no bubbles at the surface, yet when the blades are submerged by say 500mm, there is a dense layer of foam on top of the yeast. I will definately look into this more Many thanks again!

Many thanks for the excellent comments, in particularthe last two. FMJalink, I appreciate your thoughts very much and you have some valid points there that I will definately look into. In terms of the changeover, I switched off the agitators at 1500 Litres (they normally switch off...

Hi, Just an update, the pump is definately cavitating, not just sounding like it is. It is getting extremely hot and we lose all pressure on the discharge. What do people think of running the agitator in reverse so that the blades due to the angle in which they are mounted, in effect push the...

Hi 1gibson, yes this is my intended plan for the next changeover due on Sunday, I am going to shut off the agitator around 1500 Litres and see what happens. If it works then I will re write the program to incorporate this into sequence. if it doesn't work, I don't know what the next step will be!

aaah crock of s**t, upload software. please use this link http://i32.tinypic.com/294tauo.jpg