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Does the seal ring fit? Avoid bad surprises.

Axel Mueller September 11, 2018

Direct mount manifolds for direct mounting on pressure and differential pressure transmitters are normally protected against overheating by hot process media by means of correspondingly long impulse pipings. Nevertheless, many users demand that the manifolds and their flange connection to the transmitter can easily withstand even higher temperatures. For this, the manifolds must be equipped with gaskets made of graphite. This means they can easily be used at up to 550 degrees Celsius – much more than required by the current EN 61518 / IEC 61518 standards.

Metal seated ball valves for extreme operation conditions

Axel Mueller September 3, 2018

Our customers are often faced with the challenge of determining exactly the right valve/manifold application for extreme operating conditions. For process plants I can recommend the use of metal seated ball valves if abrasive products, high temperatures and pressures are present. Extreme operating conditions with temperatures up to 450 °C and pressures up to 420 bar require a special sealing technology for ball valves. Standard soft seated ball valves simply aren’t ready for this kind of requirements. Their plastic seats would fail.

There is no reason to specify DIN 19213 instead of IEC 61518

Axel Mueller August 11, 2018

EC 61518 (DIN EN 61518) is the global standard for Manifold-to-Transmitter Flange Connections. This standard has been issued in 2001. IEC 61518 is based on the German standard DIN 19213 (latest revision 1991 before superseded by IEC 61518). So, basically DIN 19213 is not anymore used with the exception of revision 1980, which is still specified in some standards. IEC 61518 has been prepared by subcommittee 65B and I was one of the subcommittee members. I am really surprised that DIN 19213 is still used after all these years, although there is no technical reason to specify this obsolete standard.

Difference between non-rotating stem designs for a low torque.

Small, but powerful: Low torque for a smooth operation

Axel Mueller August 5, 2018

During my last 12 years in the instrumentation business I have been asked many times at which pressure a manifold can still be operated. As well as, what is the difference between the following two non-rotating stem designs:

Tamper-proof valves against unauthorized access.

Tamper-proof solutions

Axel Mueller July 5, 2018

Pressures of several hundred bar, temperatures up to 600 degrees Celsius: Industrial valves, such as those used in power plants, the oil and gas industry or in chemical process systems, work under the most arduous conditions. In such cases, safety is the most important aspect. Not only the enormous pressure, but also the often toxic or aggressive process media can quickly become a hazard for people and the environment.

AS-SCHNEIDER INSIGHTS

Does the seal ring fit? Avoid bad surprises.

Metal seated ball valves for extreme operation conditions

There is no reason to specify DIN 19213 instead of IEC 61518

Small, but powerful: Low torque for a smooth operation

Tamper-proof solutions

Categories

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Hydrogen embrittlement prevention and control [Part 4 of 4]

Impact of the revision of the TA-Luft on the valve industry

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