Air Flow Meters. many types to select from.

The cheapest is Orifice type. Here you have 4 things :

1 . Set of Flanges (as per your pipe size 2"/3"/4"/5"/6")

2 . Orifice.

3 . DP Transmitter with 3-valve maifold.

4 . Indicator & Totalizer or Flow Computer or Recorder.

Contact Spirax Sarco/Honeywell/Forbes Marshall etc.

QUALITY!!!

Sorry I take back what I wrote. I thought "Quantity".

Hello "Guest",

It appears you have fallen off the perch.

I see ducon fell into your little trap.

"Quality" needs to be specified before any proper answer may be given.

1. Good Quality
2. Poor Quality
3. Bad Quality
4. Which Quality
5. And much more....

Refer: http://dictionary.reference.com/dic?q=quality&search=search

Reply here, with

Kind Regards....

Hi, Sorry for creating such confusion. But i thought i have already been very specific??

The measurement of quality of compressed air is according to ISO8573-1 standards. Therefore whether it be good or bad, it still needs to be measured....

I hope I am clear enough or specific enough?

Anyway, my questions is to know what instrument is used to measure the quality of compressed Air. What parameter is needed and how to do it?

Hope someone can help.

Best regards

Hello stargateonly

I am not intending purchasing a copy of ISO8573-1 standard.

Refer: http://webstore.ansi.org/RecordDetail.aspx?sku=ISO+8573-1%3a2001&source=google&adgroup=iso8&keyword=iso%208573-1&gclid=CMnxsayC3ZUCFSaiiQodNlAMWg

ISO 8573-1:2001

Compressed air -- Part 1: Contaminants and purity classes

This part of ISO 8573 specifies purity classes of compressed air in respect of particles, water and oil regardless of the source of the compressed air. This part of ISO 8573 identifies microbiological and gaseous contaminants. The gaseous contaminants included in this part of ISO 8573 are carbon monoxide, carbon dioxide, sulfur dioxide, nitrogen dioxide, nitric oxide and hydrocarbons with carbon atoms in the range C1 to C5. Price: $57.00 Full MBR Price: $45.60 File Size: 210 KB Hope you obtain a better answer than this one. Kind Regards....

You Spark always Sparky!

Not yet! Good quality for the process of blowing slag off a casting may very well be fatal to the man breathing the compressed air in the paint booth! Even though you have meet the letter of the ISO 9000, the actual requirement can be unsatisfied!

From your desciption, I could argue that all you need is a pressure gauge, that will tell you if the quality of pressure is too high or too low. There, your problem is solved!

You need to do your homework. What are the processes connected to the compressed air system? What do these processes need in terms of air quality and purity? What particular contaminents must be monitored and avoided?

Bacharach and other companies would be happy to sell $100s of thousands of dollars of instrumentation, but until you specifically identify what your needs are it will be wasted money.

Two main parameters..

01. Air flow meter to check CFM>

02. Du point meter to check dupoint of compressed air ( basiclly moisture in air).

03. Take a sample of compressed air & sent it to good lab to

Hi,

I supouse if you can measure temperature and pressure of the air line, then you could calculate the relative humidity (water vapor content).

May be depending on your aplication you must need to use "free of oil" air, so perhaps you will need to take a sample and send to lab for oil content analysis.

This conditions usually are indicated when you design/specified the air compressor machine.

Best regards

For compressed air quality, you need to know the Dew Point, the quantity of oil vapor & particulates, and most important to the users, the stability of pressure & flow delivery. You can do some of these yourself, but for the oil vapor & particulates (assuming you might be doing some dessicating with molecular sieve or similar), you'll need a lab to determine oil vapor and particulate size & quantity.

For dew point measurements without an insertion probe, go to a small valve (top or side of pipe away from any potential condensate is preferred) with a plastic trash bag that hasn't been opened yet. Tape the opening of the bag around the valve or pipe nipple going to it. Then stick the dew point probe in the other end by tearing a tiny hole in the bag for it. You can hold the bag around the sensor while the bag is filling. Ensure some air can escape around the DP probe so you are sure to have flow across it. Then open the valve and take your reading.

You'll want to get a sample for the oil vapor & particulate sampling. A clean double ended cylinder with valves at each end for flow through (and establish a good high flow rate before closing the discharge valve first) will ensure an adequate sample. A place like Alphagas and whoever Air Products lab is can do these tests, and they can also provide the sample cylinder. It should have been weighed before being filled with the sample.

The pressure and flow delivery are system effect analyses that can be made via observation and simple pressure gage test. I use the orange Crane 410 manual for pressure drop analysis through complex systems and relative flow capabilities based on line sizing. Also look at all regulators & throttling valves upstream and get the manufacturer's information on them (especially regulators) to learn the quantity of "droop" (pressure drop at flow conditions) if you can't get a valve Cv or haven't done valve sizing recently.

Hope this helps,

Don