Helium Leak Testing | HVS

HVS Leak Detection provides leak testing services in shop or on-site for a wide range of customer needs. We can quickly locate even the smallest leaks in any pressure system, vacuum system or hermetic system across a wide range of industries and applications.

Understanding Leakage - technetics.com

mechanical joints permit some leakage over a period of time. This leakage may range from as ... Leak Legend Ultra-Helium Helium Bubble Low Bubble Approximate Leak Rates per meter of circumference Actual leak rate in service will depend on the following: ≤ 1 x 10-11 std.cc/sec He

Sealing Sense What determines seal leakage?

Sealing Sense 48 MAY 2008 PUMPS & SYSTEMS Sealing Sense T he purpose of a mechanical seal is to prevent leakage, but all seals leak to some controlled degree. However, it is important to note that this minimal leakage can

How to: Leak detection - Mechanical engineering general ...

Mar 18, 2008· This sounds like an application for a helium leak detector. The device will pull a vacuum on the container and then helium is sprayed around the seals. The mass spectrometer in the leak detector will detect any helium passing the seals and also give you an idea of the severity of the leak.

HLT VACUUM PUMP OIL - heliumleaktesting.com

HLT-19: HLT-19 is a high quality, mechanical pump fluid for use in direct drive mechanical vacuum pumps. HLT-19 is a purified hydrocarbon fluid with excellent lubricity and resistance to gum formation and oxidation. This fluid is recommended for use in mechanical pumps where low …

What is a Mechanical seal? | AESSEAL

By maintaining a micro-gap a leak path is created making it impossible for a mechanical seal to be totally leak free. What we can say, however, is that unlike gland packing, the amount of leakage on a mechanical seal should be so low as to be visually undetectable.

Leak detection - CERN

Helium is most commonly used since it fulfils all conditions mentioned above. Therefore the leak rate is usually given as helium standard leak rate (He Std) assuming a pressure difference of 1 bar from air to vacuum. The small diameter of the helium atoms allows the detection of very small leaks.

Helium - Wikipedia

Helium (from Greek: ἥλιος, romanized: Helios, lit.'Sun') is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, ine

Cryogenic seal - Wikipedia

Cryogenic seals provide a mechanical containment mechanism for materials held at cryogenic temperatures, such as cryogenic fluids. Various techniques, including soldering and welding are available for creating seals; however, specialized materials and processes are necessary to hermetically entrap cryogenic constituents under vacuum-tight conditions. . Most commonly used are liquid helium and ...

Helium Leak Testing - Applied Technical Services

Clients may request helium leak testing to assess the performance of a material or to analyze or evaluate component longevity. Helium is the preferred leak testing medium because technicians can detect and measure it at minute leak rates (less than 1 cubic centimeter/300 years) and because the gas is inert, meaning it will not react with most components being tested.

Helium Leak Testing Services | Leak Detection | astropak.com‎

Helium leak testing utilizes a Helium Leak Detector, also referred to as a Mass Spectrometer Leak Detector (MSLD), to find a leak inside or outside of a system and then measure the leak rate. The helium leaks in/out of the tested product and is measured by the detector. The detector determines the leak rate based on the helium concentration and ...

Testing for Leaks in Refrigeration Systems - ACHR News

Nov 03, 2008· Leak detectors are a familiar part of a technician's arsenal of service equipment. Sometimes familiar leak technology gets tweaked. That was the case when Hill Phoenix, a manufacturer of commercial refrigeration systems, was looking for a way to deal with the rising costs of helium, a gas commonly used in leak detection.


Each of the mentioned examples gives a legitimate description of leak rate but the generally accepted unit is the last one because of very simple and understandable helium leak detection. Its efficiency is the result of a fierce and highly competitive developments within the last 15-20 years.

Services | Oneida Research Services

Throughout our 40 years of providing materials analysis services to the electronics industry, Oneida Research Services has established ongoing working relationships with experts in the field of applied analytical chemistry, materials processing technology, quality systems and component reliability, allowing us to offer advanced, custom services ...

Kurt J. Lesker Company | Leak Detection Overview | Vacuum ...

Leak Detection Overview Introduction. Someone at Kurt J. Lesker Company who, for many years, earned his living elsewhere detecting leaks once remarked, "There are thousands of large leaks, hundreds of smaller leaks, tens of very small leaks, the occasional leak in the 10-8 torr/liter/sec range, and only one I've ever seen at 10-9 torr/liter/sec."

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Helium Leak Detectors | Mass Spectrometers | ATEC Rentals

Helium leak detectors, also referred to as HLD or mass spectrometers, locate and analyze leaks in systems or devices with helium. Helium is a small, inert, light molecule ideal for use as a tracer gas in the detection of micro leaks, and has the added benefit …

Pipeline Leak Detection with Helium, Nitrogen Pumping Services

The normal fluid is removed from the line, the line is pressurized with the test gas, and then the helium detector is used to sense the presence of helium in the air above the line. Pressure and Leak Testing. New piping and vessels often need their mechanical integrity proven prior to use.

Helium Leak Detection Techniques - METROVAC

Helium Leak Detection Techniques VACUUM TECHNOLOGY. The tested part is pressurized with helium and placed under a cover containing a sniffer probe. The helium from the leak then accumulates over time inside the cover. The ... • Mechanical industry: fire extinguishers

Vacuum Leak Detectors and Helium Leak Detectors

Helium leak detectors are the ideal solution for leak detection and leak-tightness testing under vacuum. The test gas Helium is safe and a small, light molecule which is suitable for detecting micro leaks. The detection range of Helium in vacuum tests lies between 10-2 and 10-13 Pa · m 3 /s. Helium leak detection is extremely accurate ...

Vapor Intrusion Fundamentals: Part 31 – Leak Testing | Cox ...

Vapor Intrusion Fundamentals: Part 31 – Leak Testing By: Martin (Mort) Schmidt, CPG & Craig A. Cox, CPG. Most leak tests involve the use of tracers, which are substances introduced outside of soil-gas sampling equipment. The presence of the tracer in the sample indicates leakage, which could lead to data qualification or rejection.

Helium Leak Detection Services - Applied Technical Services

Helium Leak Testing is used for the detection of very small leaks in any component where a differential pressure can be generated. The Helium Leak rate can be reported as a quantitative (amount of leak rate) measurement. Helium leak testing can also be used to identify the location of very small leaks.

Helium Leak Testing | Calibration Services

Helium Leak Testing, Inc. calibration capabilities include all models and ranges of leak standards. We offer competitive pricing and turn-around times. Special calibrations include specific leak rates, pressure differentials and unique gases. Our vast inventory of hardware can adapt to any port connection.

What Is Helium Leak Detection | HVS

Helium is the best choice of tracer gas to find leaks for a number of reasons. It is non-toxic, inert, non-condensable, non-flammable and not normally present in the atmosphere at more than trace amounts (5 ppm). Due to its small atomic size, helium passes easily through leaks. The only molecule smaller than Helium …

MCCS International - Mechanical Completion, Commissioning ...

It can be seen that Helium leak testing (sample probe) is the most sensitive, which means, we can detect smaller leaks with higher accuracy. Consideration has to also be given to the fact that N2/He Leak Testing is less time consuming compared to the other methods mentioned. The main reasons that helium is used for leak detection are:

Alloy Wheel Leak Detection - ldsvacuumshopper.com

Only helium stable mechanical pumps should be used in wheel leak testing applications. Using gas mixes other than helium - When using gas mixtures, it may be necessary to experiment with both pressure and concentration to accomplish the necessary results depending upon specification.

Leak Testing Equipment & Solutions Provider | Leak Testing ...

Leak Testing Solutions Ltd is a UK based manufacturer, engineer, and innovative solutions provider of standard and custom engineered, non-destructive, industrial, air and tracer gas leak detection machinery, and custom tracer gas handling system solutions.


a final automated fine leak test is carried out using helium (if a component has a gross leak and this is not detected first with a pressure decay test, large quantities of helium will leak out of the test unit, contaminating the system and making it inoperable for a long time).