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What is an AMS2750 calibration survey?
Our blog post takes a short look at the AMS2750E standard, with a special focus on the requirements set for calibration, calibration accuracy, and test/calibration equipment. The AMS2750E is predominantly designed for heat treatment in the aerospace industry. Heat treatment is an essential process fRead more
Our blog post takes a short look at the AMS2750E standard, with a special focus on the requirements set for calibration, calibration accuracy, and test/calibration equipment. The AMS2750E is predominantly designed for heat treatment in the aerospace industry. Heat treatment is an essential process for many critical parts of an airplane, so it is understandable that there are tight regulations and audit processes set. While the results and success of some other industrial processes can be relatively easily measured after the process, this is not the case in a heat treatment process. Therefore, very tight control and documentation of the heat treatment process are essential to ensure the quality of the end products.>>>READ MORE
Source: Beamex Blog for Calibration Professionals
See lessHOW CAN I CELANΔ°NG CONTAMΔ°NATΔ°ON OF VACUUM FURNACES?
"When operating vacuum furnaces, situations may arise in which the hot zone and/or cold walls may become contaminated (Fig. Nos. 1 β 2). This can occur from a variety of sources: air leaks, outgassing from residues left on the parts as a result of the manufacturing or cleaning processes, vaporizatioRead more
“When operating vacuum furnaces, situations may arise in which the hot zone and/or cold walls may become contaminated (Fig. Nos. 1 β 2). This can occur from a variety of sources: air leaks, outgassing from residues left on the parts as a result of the manufacturing or cleaning processes, vaporization of sensitive materials (e.g., chromium-bearing materials), process-induced contaminations such as carbon in the form of soot or tar, fluxes from brazing pastes, excess braze alloy as well as many other sources. Often times the work being processed is also affected (Fig. 3). The question becomes, how do we attempt to clean up our contaminated vacuum furnaces? >>>Read More
Source: VAC AERO International
See lessHow do you perform a helium leak test on a vacuum furnace?
Finding leaks in vacuum furnaces is a task that few people look forward to, however it is important and necessary. Leaks happen almost always and can occur suddenly or develop over time. They can damage both the material being heat treated as well as internal furnace components. When left uncheckedRead more
Finding leaks in vacuum furnaces is a task that few people look forward to, however it is important and necessary. Leaks happen almost always and can occur suddenly or develop over time. They can damage both the material being heat treated as well as internal furnace components. When left unchecked leaks will stop the furnace from pumping down and will compromise the heating elements. Small leaks often go undetected since the pumping system can overcome them, but they can still cause continuous and eventually catastrophic damage. It is therefore highly recommended that routine leak checking and repair be a part of any good preventative furnace maintenance program.
An Excerpt: “Why is helium used to detect leaks? Helium is used as a tracer gas to detect leaks for several reasons. These include the fact that it constitutes only ~ 5 ppm in air so that background levels are very low. Helium has also relatively low mass so that it is βmobileβ and is completely inert/non-reactive. Helium is also non-flammable and generally widely available and low cost. This association with helium is one of the reasons why one of the most accurate and rapid leak detection methods employs helium as the tracer gas and a mass spectrometer for the analyzing/measuring. Furthermore, helium is chosen as a tracer gas because it is light, very quick, and absolutely harmless.” >> Continue Reading
See lessWhat is a gas ballast valve on a vacuum pump?
The gas ballast valve on a mechanical oil-sealed rotary vacuum pump is a very simple device that offers several potential benefits for vacuum pump users and when used correctly can keep a vacuum pump working well. However, gas ballast valves but are often overlooked and are poorly understood, this aRead more
The gas ballast valve on a mechanical oil-sealed rotary vacuum pump is a very simple device that offers several potential benefits for vacuum pump users and when used correctly can keep a vacuum pump working well. However, gas ballast valves but are often overlooked and are poorly understood, this article helps take some of the guesswork out.
An excerpt: “When pumping atmospheric air (or gas) in a vacuum system, however βpureβ it may appear to be, it will invariably contain some vapor. During the compression process in the pump, this vapour will condense. Failure to remove it will form a contaminant which will prevent the pump from achieving its optimum vacuum pressure. Also, the condensate can enter the pumpβs mechanism, for example the oil in oil-sealed rotary pumps, where, as a contaminant, it can have a detrimental effect.” >> Continue Reading
See lessWhat type of water treatment do you recommend for a closed-loop cooling system?
Every closed-loop cooling system needs a modest amount of chemical treatment. Most are used once and then checked yearly. We recommend a sodium nitrite-based inhibitor with biocide to prevent biological contamination. This treatment is usually done at a 1% concentration so not much is needed. TheseRead more
Every closed-loop cooling system needs a modest amount of chemical treatment. Most are used once and then checked yearly. We recommend a sodium nitrite-based inhibitor with biocide to prevent biological contamination. This treatment is usually done at a 1% concentration so not much is needed. These inhibitors will protect both the ferrous and non-ferrous materials in your piping system. Many treatment chemicals come with a colorant which allows the treatment to be visually monitored.
Source: Dry Coolers
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