ATEX & hazardous areas


operating efficiencies greater than 90 per cent. Wanner pumps offer accurate metering and dosing with extremely low pulsation due to multiple diaphragms in a single pump head; this configuration can negate the requirement for pulsation suppression devices and can eliminate pipe strain due to reduced acceleration head losses when compared with traditional single diaphragm metering pumps. Another technical advantage of the Wanner pump is the unique and patented ADPC (Advanced Diaphragm Position Control) system ensuring. Hydra- Cell Pro’s diaphragm integrity and security, which is paramount for any process; is protected by robust hydraulic management of the diaphragms position. This ensures security of process even under the most abnormal inlet conditions, giving operators time to detect, address and rectify the cause of the abnormal inlet condition without immediate pump failure or damage to equipment.


For metering and dosing applications, reliability is in part facilitated by low pulsation. More traditional metering pumps require installation of pulsation dampers. If they are not correctly charged and maintained, the resultant pulsations can create shock loading on the pump resulting in component damage or potential pipe fatigue and weld cracking, requiring engineers to operate within the hazardous environment. Selecting a pump with very low pulsation could avoid this.


Wanner pumps exceed API675 standards for steady-state accuracy (+/- 1%), linearity (+/- 3%) and repeatability ( +/- 3%) over a wide adjustable flow range.


The application of measurement technology varies significantly between industries due to differences in environmental conditions, process requirements, and safety standards. In the oil and gas sector, metering systems must function reliably across wide temperature ranges, such as the Ukrainian application operating between -12°C and +45°C. Other industries require a range of flows, which these pumps deliver (from 0.23 to over 38 L/hr) with a maximum pump rpm of 396.


The hazardous area assessment process defines precisely the environment, including ambient and liquid temperature range, pressure, liquids being pumps and the likely flammable gases present in the atmosphere. Only pumps that can safely meet the requirements and operate safely in the defined environment are offered.


These conditions place significant demands on instruments, which must maintain accuracy despite temperature fluctuations, pressure variations, and exposure to corrosive substances. Accurate fluid measurement is essential for operational efficiency, ensuring compliance with regulatory standards while minimising product loss and environmental impact. Advancements in pump technology have also addressed ATEX compliance. Wanner’s Hydra-Cell T100 and Q155 Series high horsepower pumps have achieved ATEX Zone 1 certification. These pumps comply with standards EN 80079-36:2016


Instrumentation Monthly June 2025


and EN 80079-37:2016, ensuring essential health and safety requirements are met.


The responsibility for ensuring whole system safety extends beyond individual product components. Suppliers of processing solutions must collaborate closely with integrators to guarantee that all components when assembled meet the requirements of the ATEX directive. Remote control of processes plays a vital role in hazardous or explosive environments by enabling the collection of critical data without direct human contact. By controlling and monitoring temperature, pressure, gas concentrations, and equipment conditions from a safe distance, just as effectively as up close, makes for a much safer working environment.


The Wanner metering and dosing solution can be integrated into a control system and controlled via a 4–20 mA analogue input signal to precisely control pump flow rate by varying motor speed remotely. With a drop in/plug and play) solution, our pumps remote control capabilities allow precise and linear control of the motor speed and therefore flow rates. Any approach needs to enhance safety, support continued compliance with the ATEX directive and other regulatory standards, and ensures the continuous and accurate operation of systems in environments where direct measurement may pose significant risks. A failure in one part of the system can compromise the entire operation, making it essential for manufacturers, service providers, and operators to take a holistic approach to safety and compliance. This includes rigorous testing, certification, and ongoing monitoring to verify that all components perform as expected under real- world conditions.


Ensuring system-wide integrity protects personnel, assets, and the environment while enhancing


operational efficiency and regulatory adherence in some of the most demanding industrial settings. Developing processing solutions for hazardous areas requires a deep understanding of the regulatory landscape, environmental challenges, and technological advancements. Engineers must balance competing priorities, such as safety, accuracy, durability, and cost-effectiveness, to design systems that meet the needs of modern industries while maintaining compliance with the ATEX Directive and other relevant safety standards. Collaboration between industry stakeholders is critical to advancing technologies in hazardous areas. Equipment manufacturers, regulatory bodies, and industrial operators must work together to develop and implement solutions that improve safety and efficiency. The shift towards digitalisation presents new opportunities for improving remote management and measurement. These advancements not only enhance safety but also contribute to greater operational efficiency and sustainability in hazardous environments.


As industries continue to evolve, so too must the technologies used to measure and monitor liquid flows in industrial processes . The integration of smart sensors, wireless communication, and real-time data analysis is transforming the way hazardous area measurements are conducted.


By adopting a proactive approach to safety, innovation, and collaboration, industries can improve the reliability and accuracy of control of liquid flows in hazardous areas ultimately leading to safer, more efficient, and more sustainable operations in some of the world’s most challenging industrial environments.


Wanner International wannerpumps.com


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