Exakta Industry Sectors
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Nexa Series Hydraulic double-diaphragm and packed plunger pumps with full-motion mechanisms

Industry Sectors Exakta is present across all major industry sectors, delivering heavy-duty pump systems to some of the world’s most challenging processes. From chemical dosing to liquid transfer, Exakta’s broad product range means we’re able to offer application-specific solutions that provide precision, consistency and sustainability. Oil & Gas From onshore to offshore, dosing solutions in the oil and gas industry must cope with stringent technical specifications and harsh environmental conditions while maintaining consistent performance and high durability. Power Generation Metering...

1 Oleochemicals The oleochemicals industry - the extraction of products such as fatty acids, fatty alcohols, methyl esters and fatty amines - offers a sustainable alternative in the production of toiletries, soaps, food additives, surfactants, detergents and biofuels. Fertilizers With their high precision, range of flow rates and robustness, metering pumps enable fertilizer manufacturers to safely and sustainably produce primary and multicomponent fertilizers that can have a significant effect on yield and crop quality. DesalinationPlastic Production Seawater desalination is an essential...

Nexa Series Hydraulic double-diaphragm and packed plunger pumps with full-motion mechanisms Capable of superior performance in even the most severe operating conditions, the Nexa Series packed-plunger and hydraulic double-diaphragm metering pumps represent one of heavy industry’s most versatile, robust and reliable fluid metering and dosing solutions.

Nexa’s exceptional build quality enables stable dosing even under extreme operating pressures and temperatures, from wellhead chemical injection in oil and gas applications to pyrophoric liquids handling in chemical compounds manufacturing. Designed to meet API 675 3rd edition standard, compliant to ATEX2014/34/EU, TR CU 004-010-020-012/2011 and alignable with Shell DEP (various), Norsok M-501 & M-630, NACE 0175 specifications, Nexa can be safely operated in hazardous processes, reassuring operators of the pump’s suitability regardless of the application. Technical Features Pressure: up to...

Hydraulic doublediaphragm heads version A trustworthy solution for applications requiring the highest levels of operational accuracy and reliability. Features include: • Hydraulic oil-operated diaphragms • Double oil for hydraulics and mechanism lubrication ensuring 100% chemical tightness and operational safety for higher reliability, dosing accuracy and application flexibility • Sealed design for metering hazardous fluids such as toxic or corrosive solutions • Protection against external contamination • Preformed PTFE diaphragms as standard, for excellent chemical compatibility and...

Mechanism Full-motion type in six different sizes, featuring: • Oil-bath lubrication • Low-noise internal worm gearbox • High-precision stroke adjustment for ultrafine volume control • Increased turndown ratio achievable via frequency converter • Housing available in cast iron as standard and nodular cast iron to cope with harsh ambient conditions • Exakta-designed electrical and pneumatic actuators available Valves Exakta is committed to developing flexible and customized valve configurations with flow channels specifically designed to improve hydraulic efficiency while coping with...

Nexa Series Features Stroke adjustment Flow rate variation is by adjustment from 0 to 100% of the plunger stroke length. Stroke adjustment can be achieved both manually and automatically. Versatile motor installation The driving motor can be fitted horizontally (either side) or vertically and can also be supplied suitable for variable speed drive and on demand with relevant inverters and filters. Bespoke base plate design Pumps are provided with an API 675 standard or customized base plate, designed according to customer and application requirements.

Venting system While guaranteeing automatic venting of the hydraulic chamber during operation, this system also facilitates pump start-up with a manual action to purge the air/gas. Rupture detector Should one of the two diaphragms fail, the integrated protection system immediately signals the anomaly, allowing the pump to continue functioning on the undamaged diaphragm until maintenance can be scheduled. Cartridge valves Built-in relief valve Protects the double-diaphragm pump against unexpected overpressure Double and triple-ball configurations are available with high-precision seats and...

Nexa XPHydraulic configuration Exakta's broad experience in supporting customers throughout the most challenging projects has led to the development of Nexa XR a special version of Nexa able to cope with extreme suction conditions and a wide range of chemicals. These are limit values, please state actual conditions with enquiry.

Nexa XP complies with the most stringent requirements in terms of strength and reliability, ensuring: • Minimized internal stresses thanks to the FEM-designed hydraulic diaphragm • Compatibility with dangerous, toxic, flammable and pyrophoric chemicals • Best-in-class NPIP required (down to 0.1 bar) • Highest admissible suction pressure (200 barg) Nexa XP’s pyrophoric configuration Nexa XP is designed with the delivery of pyrophoric fluids in mind. In its pyrophoric configuration, Nexa XP guarantees that the critical needs of isolating the chemical from an oxygen source are fully met, even...

B Type - Max. pressure 450 barg (600 barg upon request) Head Size H Type - Max. pressure 200 barg Head Size A B C C (LT) D1 D2 E2 F2

Y Type - Max. pressure 40 bargHead Size Max. Flow Rate [l/h] Fluid Temperature [°C] Viscosity [cPs] Material A 11,3 -20 /120 1000 316L SS

heads information P Type - Max. pressure 40 barg Plunger [mm] Max. Flow Rate [l/h] Fluid Temperature [°C] Viscosity [cPs] Material K Type - Max. pressure 200 barg Plunger [mm] Max. Flow Rate [l/h] Fluid Temperature [°C] Viscosity [cPs] Material U Type - Max. pressure 650 barg Plunger [mm] Max. Flow Rate [l/h] Fluid Temperature [°C]