4 replies to this topic

[Dolla]

can anyone tell me how to design /size equipments and what are the equipments required in order to produce instrument air. i just have a rough idea that the package should contain an air compressor, air receiver, air dryer and filters. Can someone with indepth information on this system respond.

Thank you guys

[Art Montemayor]

Dolla:

I think the following Website gives you a very good description of what you have described as your subject and what you need to consider in designing and specifying an instrument air package:

http://www.nwequipltd.com/InstrumentAirPackages.htm

You haven't stated your capacity range and this is calculated or estimated by you depending on the type and quantity of instruments that you want to service. Some installations have reserve capacity for also servicing ad hoc requirements for service air in the same plant. Depending on the type of instruments you have and the capacity you require, I would strongly recommend that you opt for a non-lubricated compressor – if possible. What I mean here is that if you are going to use a reciprocating compressor, then non-lubricated cylinders are recommended for this service.

I also recommend that you opt for an adsorption type of dryer (with Activated Alumina adsorbent) that will give you a design dewpoint for your product air of -60 ^oF. This means you should avoid refrigeration-type "dryers".

Always include an in-line, spared, micro filter (with a dP indicating gauge) in your product air supply line to remove any possible adsorbent dust or other solid particles from the dried air product going to the instruments.

I hope this experience helps out.

[delphitt]

Hi,

I have to evaluate an instrument air package for my Plant. I could really use some help with constructing the templates. For those who may have done this before...any tips??

thanks so much...
Sophia

[Art Montemayor]

Sophia:

What is a "template" used in evaluating an instrument air package?

If it has nothing to do with the suject of this thread, then please start a new thread on your subject. It is better to handle different subjects with respecive threads; otherwise, chaos takes over.

[delphitt]

A 'template' is essentially a baseline set of calculations based on design equations and operating data that one can use to evaluate equipment. It is used by simply inputting current data and depending on the type of equipment and application, only small modifications are required to the calculations.

I was simply looking for a guideline or a set of calculations that have been used in the evaluation of instrument air packages that i can apply to my Plant.

Hope this clears it up.
Please advise.