28 Five key design features for high-performance turbine fl ow meters


In the second part of their turbine series, Titan Enterprises highlights the fi ve critical design features of Pelton wheel turbine fl owmeters, focusing on key elements for creating a cost-effi cient and reliable product.


Pelton wheel turbine fl owmeters are designed to provide excellent linearity and repeatability, essential for accurate measurement. One subtle but important aspect of the design is the radial clearance of the turbine within its housing. Too small a clearance causes drag, affecting linearity, while too large a clearance leads to undesirable gas entrainment and excessive chamber volume. Titan addresses this by using a hexagonal chamber that generates vortices, minimising drag and maintaining linearity even as fl uid velocities become laminar.


The second key feature is the fl owmeter’s long operational life. Bearings are critical in this respect, as they must withstand the wear caused by water-based fl uids and aggressive chemicals. Titan uses sapphire or ruby bearings, ensuring durability even in demanding applications like medical equipment, where fl owmeters may need to function for several years. This careful choice of materials helps maintain low friction and consistent performance over time.


In-line meter connections are another important design consideration. Titan’s solution places the inlet and outlet opposite each other, a confi guration that minimises pressure drop and simplifi es installation. This design also eliminates the need for more complex arrangements that can increase fl uid volume and complicate bearing placement, making it both cost-effective and easier for customers to install.


Good chemical resistance is crucial, especially for applications in food or medical industries. Titan uses NSF-approved PVDF for most of their turbines, which ensures they can withstand even the most corrosive environments. Additionally, magnets used for detection are overmoulded to protect them from aggressive chemicals, further extending the fl owmeter’s life.


Finally, Titan’s focus on ease of manufacture ensures that their turbine fl owmeters are cost-effective and reliable. The design incorporates modern moulding and machining technologies that simplify production and ensure consistent quality, while also allowing for easy interchangeability of components.


In summary, Titan’s Pelton wheel turbine fl owmeters provide a versatile, durable, and cost-effective solution for low-fl ow measurement across a range of industries. When selecting a fl owmeter, Titan recommends ensuring that the device meets the specifi c needs of the application, including fl ow range, pressure, temperature, and chemical resistance.


More information online: ilmt.co/PL/w52D and ilmt.co/PL/5OJv 63739pr@reply-direct.com Rapid, reliable moisture measurement


The KERN DBS halogen moisture analyser is designed to deliver fast and reliable moisture measurements, providing consistent results with delicate samples. It uses the thermogravimetric principle, where an integrated balance measures the starting weight of a sample before the drying process begins. The halogen-quartz glass heating unit then dries the sample while continuously recording its weight, interpreting the weight loss as moisture content. This method allows the analyser to achieve measurement accuracy up to +/- 0.01%, depending on the sample size.


The analyser’s integrated balance is built with a new Single-Cell Generation weighing cell made from aluminium alloy, offering short stabilisation times and high temperature resistance. This ensures that the weighing result is indicated signifi cantly faster compared to other systems. The KERN DBS uses infrared radiation from its 400 W halogen heater for drying, allowing for precise temperature control, making it suitable for thermo-sensitive samples. The device can automatically switch off or operate based on a set time, with temperature ranges from 50 to 200°C. Multiple heating profi les allow the procedure to be customised to specifi c samples, providing reliable and fast results.


Various drying programs are available for different types of samples. The Standard drying setting works well for most samples, while the Gentle drying option is ideal for substances like plastics, where gentle heating prevents decomposition. The Rapid drying setting is recommended for samples with high moisture content, and Stage drying offers an alternative to Gentle drying by pre-heating the sample to avoid damage.


The KERN DBS allows users to store up to ten customizable drying programs with parameters like drying time and temperature, ensuring repeatable results. Up to 100 drying processes can be documented within the device, and results can be transferred to a PC or printer via USB or RS 232 interface. To maintain accurate long-term measurements, KERN offers regular calibration services, ensuring reliable performance over time.


More information online: ilmt.co/PL/OkkM and ilmt.co/PL/LLLR 63335pr@reply-direct.com Sustainable temperature control systems


Peter Huber Kältemaschinenbau SE has revised the Unistat temperature control systems and expanded them with the latest technologies. The concept, which has been established for decades, is now even more effi cient and sustainable and offers a 4-year guarantee. Numerous models are now also available as ‘Green Line’ versions with CO2


refrigerant (R-744). These units have a refrigeration circuit with zero Ozone Depletion Potential (ODP = 0), negligible Global Warming Potential (GWP


= 1) and the refrigerant is non-fl ammable. The ‘Green Line’ models are a 100% environmentally friendly and future-proof alternative to comparable appliances using synthetic refrigerants. The Huber product range covers the entire spectrum from laboratory to production with natural refrigerants which is unique in the fi eld of liquid temperature control!


Another innovation with the Unistats is the reduced internal fi lling volume, which means that signifi cantly shorter heating and cooling times can be achieved. With this improvement in ‘time-to-temperature’ and response times, processes can be carried out more effi ciently in a shorter time. The units are now equipped with a state-of- the-art, magnetically coupled circulation pump with high fl ow rates ensuring optimum heat transfer to the application. In addition, improved functions for venting and degassing have been integrated, ensuring fast commissioning and trouble-free operation.


The safety concept and the interface modules have also been revised. All safety features comply with performance level C or higher (DIN EN ISO 13849-1). For optimum connectivity, the new ‘Com.G@te DIGITAL’ is included as standard. It features the most common digital interfaces and offers improved measurement accuracy for temperature detection. The connections can be expanded at any time via additional modules and gateways – with the optional ‘Com.G@te PLUS’ also with analogue interfaces.


Further advantages of the hydraulically sealed Unistats are wide temperature ranges without fl uid changes. No oil vapours or oxidation of the heat transfer fl uid (HTF), extending the service life of the HTF. Unistats also boast sustainable energy management with extremely low power and water consumption resulting in a noticeable reduction in operating costs. The housing design reduces the footprint of the Unistats, resulting in smaller space requirements in often already congested laboratories or production environments.


Another unique selling point is the extended warranty period of 4 years – which has been valid for all Huber temperature control units since the beginning of 2024. All it takes to extend the warranty is a one-off registration using the serial number of the unit within 3 months from the delivery date.


More information online: ilmt.co/PL/8xZy 62656pr@reply-direct.com


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LAB ASIA - FEBRUARY 2025


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