This part of ISO provides a selection of suitable test methods from those available for the measurement of contamination gases in compressed air. The applicable ISO standards you may use to benchmark your equipment’s .. ISO specifies the test method for gaseous contaminant content. Find the most up-to-date version of ISO at Engineering

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Typical testing time is between 2 minutes and 10 hours, depending on the flow rate, the pressure available, and the oil 8573–6 class limit. Option to visualize changes at a glance. This enables easy cleaning in between multiple samples. There are no established ISO purity classes or limits for these other gases. They include condensation nucleus counting, differential mobility analysis, and scanning mobility particle sizing. There are other methods mentioned in ISO for particle determination that are not covered in this discussion.


Sampling and Testing for Compressed Air Contaminants

No particle size or quantity is determined. Avoid cleaning agents with solvents that can affect hydrocarbon content of a sample. The other eight sections address sampling techniques and iwo methods for various contaminants. Other purity classes require liters of air or less. Trace has a rental program that includes necessary calibration documentation, simplified sampling instructions, and a high-pressure diffuser to prevent damage to the sampler.

Code s Theme s There should be no sudden pressure drops to avoid damaging membranes.

Select the first category of products searched and follow the instructions. The maximum allowable number of particles per cubic meter varies by purity class. In addition, Method B2 uses a straight sampling probe for partial flow sampling under isokinetic conditions.

Particle purity classes 6, 7, and X are typically used for industrial tools and pneumatically powered and operated machines with air filtered by general-purpose filters. Both techniques are intended for oil contamination levels between 0.


Register online at inter and intra-company training, and certifying diplomas, seminars, distance learning. The straight connection is important so as not to lose or trap particles before they are sampled.

Handheld portable hygrometers for measuring dew point in compressed air are more readily available 8573- when ISO was written in Typical testing time is between 50 and hours. A minimum air volume of 5, liters is required to meet class 1 purity level of 0. To prevent the interference of isl moisture permeating into the compressed air sample stream, select impermeable materials, such as polished stainless steel or PTFE. This assures that the sampler is operating correctly prior to sampling compressed air outlets.

ISO has a few definitions that help clarify which hydrocarbons are to be tested:. To name a few, common terminology includes condensed hydrocarbons, oil mist, oil aerosol, oil vapor, total gaseous hydrocarbons, and total volatile hydrocarbons—and the list goes on. Compressed air – Part 4: 5873-6 Collection with Microscopy: Test methods for measurement of humidity.

A number of hygrometers are available, ranging from insensitive and cheap to very precise and expensive models.

Additionally, samples can be held indefinitely for re-analysis by microscopy or other more specific techniques. This will be represented by a length of stain that can be read using the scale printed on the detector tube. When stainless steel cannot be used, specify flexible tubing with low particle shedding properties.

Compressed air – Part 5: Once again, the sampling procedure calls for a sampling probe, this time being installed into a stainless steel extraction tube filled with coconut charcoal. There are so many different words to describe oil. Oil vapor analysis is required only for classes 1 and 2. Whenever a sample is taken from a compressed air outlet, it is important to ensure that the sampling process itself does not contribute to contamination. Oil vapor or gaseous hydrocarbons are frequently noted in parts per million ppm.


Legal notices Photo credits FAQ. Trace uses commercially available charcoal tubes made of glass. It is quite common for air compressor systems to have a permanent, fixed-mount hygrometer that can provide the dew point at various points throughout a system.

Avoid the potential for leaks by limiting elbows, tees, and valves. A slight amount of hydrocarbon contamination in a fitting is enough to produce unacceptably high levels of oil vapor OV on the charcoal tube. Samples are analyzed using an optical microscope. ISO is the primary section that provides contaminants and purity classes. Therefore, clean, oil-free fittings are critical for a true determination of airborne contamination. These tubes possess the advantages of being less expensive and having a more reliably low level of contamination than laboratory-prepared tubes.

A laser particle counter LPC is a high-performance, sensitive electronic instrument, and it is an excellent method for determining all three particle size ranges for particle purity classes 1 and 2.

ISO – Compressed air — Part 6: Test methods for gaseous contaminant content

Purchase More information add to basket. ISO describes a sampling probe that is inserted into a pipeline to capture a sample. In addition, they may not provide results in terms that are readily converted to the units employed by is standard.

The membrane in this case protects the charcoal tube from aerosol contamination. This method cannot measure the smallest range of particles, from 0. Caution the offer 1 user is reserved for a single 8537-6, any broadcast even within his company is prohibited. February Number of pages: