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Great input guys thanks. I'm going to look into CD nozzles a bit more, and think about maintaining the temp drop as much as possible. I'm thinking of combining two or more techniques to try and reduce the air temperature. I'm hoping strategic use of cooling fins might yield positive resuls...

Thanks Latexman. I don't have a thermo book. What formulae did you use to give you 27.4 Deg?

My apologies for double posting. I didn't realise it was a no no. So btrueblood you think its possible to cool to 5 deg c with a CD nozzle then. That is interesting. That seems a lot of cooling with a dp of only 0.5 barg. Time to get one in and run some test then I feel

Can anybody enlighten me please!!!!!! How much air cooling is possible through a convergence divergence nozzle. I am trying to cool compressed air from 35 Deg C to around 5 Deg C. Is this possible through a CD nozzle with an air flow of around 50 LPM and a pressure of 5 barg. I have a...

not much of any metals in analysed condensate. 8ppm pottasium, is that high? copper 0.07 ppm..!!

I don't know what the green is Pud!! It's PA66. Why would green indicate water take up? There is a lot of copper in the system so could the green be from the copper. The surface is not so much crystaline, we are going to visit moulders to go through their process settings.

There are also natural coloured unfilled nylon components in the system. These do not degrade like the GF nylon, but the surface cracks up a lot like crazy paving, and turns GREEN

The components are still required to be used with oil. A change in material type is last option due to different shrinkage rates, resulting in expensive tool mods. What could attack nylon so badly. Am i overlooking something? Apparantely no ozone present. There is copper in the system which...

That sounds logical Demon3. The problem i have is that 30% glass filled nylon components are becoming so degraded they can easily crumbled between your fingers. The temp is no higher than 65 degrees c. The components are only in service 6 months. There is water present. These components...

Yes EdStainless reverse osmosis water used in the cooling, and any water from the atmospheric air that the compressor sucks in. The max temp within the system is 65 degrees c

Is it possible that the removal of a lubricating oil containing antioxidant additives may give rise to the nylon components within the system suffering oxidative attack. What i'm trying to say is........do the antioxidant additives in lubricant oil also act as an antioxidant film that...

Unclesyd, Could you give a little more info about the synthetic oil additive removal issue you know of?

Thanks for that TV, Would an oil film covering the nylon component not offer any oxidation resistance then? I have a problem of nylon components that are basically so degraded that they crumble after only 6 months in service. The same components have been used for years in an oil lubricated...

Is it possible that the removal of a lubricating oil containing antioxidant additives may give rise to the nylon components within the system suffering oxidative attack. What i'm trying to say is........do the antioxidant additives in lubricant oil also act as an antioxidant film that...

Does anybody have any experience of glass filled nylon 30%, being degraded by copper chloride. The GFN components are basically turning so soft you can crumble them between your fingers. I have an application where there purified water is used as a coolant. The purified water is chlorinated...

Why is it that the condensate produced by oil free compressors (water injected, screw) is acidic. I have been told about this many times in the past, but have never had the reasons why explained. I understand the location of the compressor is important to air quality, and condensate pH, with...

that sounds interesting CompositePro. The only thing is that i have never seen this before and these components are subjected to constant humidity & pressure differentials. However, this problem seems to happen in only one installation type (oil free compressors), i wonder if the temperature...

Does anybody have any experiences of glass filled nylon turning to dust. The application is a compressed air filter. The housing is aluminium, and the GFN component is fitted within the housing. It see's compressed air condensate, probably in the 7-16 barg pressure range, at anything upto 80...

No it's a brand new valve. I'll see if i can get a measure of the voltage across the coil. Could this be a water hammer thing. I'm not sure if it occurs in small orifi. I am discharging through a 3mm orofice. Around 100ml of fluid at a time.

Hi Guys, I'm still kinda stuck on my solenoid buzzing problem. The application is a pressure vessel that uses a solenoid valve to activate the discharge of water. The valve system is balanced by the pressure in the system, and the solenoid overcomes a spring force lifting a valve off a seat...