MechChem Africa March-April 2021

⎪ Products and industry news ⎪

Keller’s custom solutions for complete systems

WhileKeller’s standardproduct catalogue covers most applications for pressure measurement technology, there are often great benefits to customising pressure sensors formore optimal use and integra- tion into higher-level complete systems. Keller’smodular product design offers great flexibility and allows customer- specific adaptations to be made without causing soaring costs – even for small pro- duction runs. Creating tailored customer- specific solutions involves: defining basic sensor specifications inorder to select the appropriate component; assess the envi- ronmental conditions todetermine theap- propriatedesign for the intended location; designing therequestedcustomer-specific solution taking all standards and laws into account; assembling the electronic Mouser Electronics, Inc is now stocking the new Sterling-LWB5+ modules from Laird Connectivity, which deliver Wi-Fi 5 (802.11ac) and Bluetooth® 5.1 com- munications to next-generation Internet of Things (IoT) devices such as battery- powered medical devices, industrial IoT sensors, rugged handheld devices, and other connectivity solutions. The modules are powered by the InfineonCYW4373E solution, supporting reliable and secure performance in indus- trial IoT settings. Ideal for harsh environ- ments, theSterling-LWB5+modules boast a solder-downmodule formfactor tomini-

modules, taking into account application- specific customer requests; configuring electrical interfaces and connections; and customising product labelling. Keller has 50 years’ experi-

ence in countless challeng- ing projects in the field of piezo-resistive pressure measurement technology. Applications that at first glancemay seemtrivial, can actually prove to be highly complex on closer analysis. By taking the actual usage conditions

KELLER Custom Solutions optimise pressure sensors in higher- level complete systems.

of the sensor into consideration right from the outset of a customisation, Keller has achieved major improvements in ef- fectiveness and durability of its pressure measurement systems.

Keller’s custom solutions are available in South Africa from INSTROTECH www.instrotech.co.za

Wi-Fi and Bluetooth modules for next- generation IoT applications

along with a reverse polarity SMA cable assembly specifically for Sterling-LWB5+ modules. The antenna range includes the proven internal FlexPIFA, Nanoblade and Mini Nanoblade Flex antennas as well as an external dipole antenna. The modules support the latest WPA3 security stan- dards, and the devices’ integrated power amplifier and low-noise amplifier (LNA) ensure reliable connectivity, even in chal- lenging RF environments. eu.mouser.com

mise the effects of vibration and impacts, aswell as an industrial temperature rating of -40 ±85 °C. The Sterling LWB5+ range provides for several small-form-factor PCB modules with options for integrated

and pre-certified external an - tennas, as well as a couple of M.2 form factor solutions for increased host integration flexibility for designers’ Linux platforms. For optimum integration LairdConnectivityhasalsopro- duced and certified a range of internal and external antennas,

Laird Connectivity modules are powered by the Infineon CYW4373E solution, supporting reliable and secure performance in industrial IoT settings.

GEMÜ Tugela butterfly valve

simple eccentric construction, the main seal is offset to the shaft axis and there is no interruption over the entire 360° sealing circumference with this design. With the double-eccentric design, as the second eccentricity, the shaft axis is moved away from the piping axis so the shaft centre is slightly offset. Further features of the GEMÜ R470 Tugela butterfly valve include: shaft blow-out protection as an additional safety measure in case the shaft breaks; and improved sealing due to an opti- mised disc design in spherical form. The GEMÜR470Tugelaalsohas anantistatic spring for use in ATEX areas and a TFM seat ring, which is particularly low-brittle and ensures reliable use in a wide tem- perature range. www.gemu-group.com

Valve specialist, GEMÜ, is now offering wafer versions of the GEMÜ R470 Tugela series in nominal sizes of DN 50 to DN 600. T h e GEMÜ

butterfly valve and suitable for pres- sures up to 40 bar or temperatures up to 230 °C. The butterfly disc separates di - rectly fromthe sealing seatwhen it opens, which reduces wear and thus increases service life. Thanks to the locking screw on the actuator flange, the gland packing can be retightened directly at the shaft, which sits in a carbon braid bearing, so that the butterfly valve can be serviced when installed. This, in turn, significantly reduces the maintenance requirements. When constructing butterfly valves, a distinction is made between three main designs. In a concentric design, such as the GEMÜ Victoria series, the pivot point is in the centre of the seat valve, ie, the main seal is interrupted by the shaft. In a

Tugela butterfly valve is particu- larly distinguished by its double-eccen-

tric construction, which is why it is also designated as a high-performance

A GEMÜ R471 Tugela butterfly valve with automated actuation.

March-April 2021 • MechChem Africa ¦ 41