With the holiday season just around the corner, we want to inform you that our team will remain available to assist you with quotations and technical support throughout the period.
Our offices and workshop will be closed only on the following days:
Please organize your orders accordingly.
We wish you a wonderful holiday season and a happy New Year!
Selecting an industrial pump for acids is a critical engineering decision that goes far beyond simply transporting fluids. A meticulous selection process is essential to ensure operational reliability, process efficiency, system longevity, and, above all, safety. Choosing the wrong pump can lead to premature failures, costly downtime, inefficient energy consumption, and potentially hazardous situations. This guide provides an analysis of the essential technical parameters to consider when selecting the most suitable pump for your needs.
The fluid itself dictates most of the pump selection criteria. Its physical and chemical properties will determine the appropriate materials of construction, the type of pump required, and the power needed to move it.
The first step is to identify every chemical component of the fluid. This analysis is crucial for selecting materials that can withstand corrosion, degradation, and chemical attacks.
GemmeCotti specializes in this field, offering a wide range of pumps for acids and hazardous liquids made from thermoplastic (PP and PVDF) and metallic (Stainless Steel 316) materials. To select the right material for the pump, GemmeCotti technicians rely on over 30 years of know-how in the chemical pump field and compatibility charts from authoritative sources. To get an idea of material compatibility with the most common liquids, you can refer to the chemical compatibility guide.
Viscosity is a measure of a fluid’s resistance to flow. It is one of the most critical parameters affecting pump selection and performance.
Temperature affects several parameters:
Specific gravity is the ratio of a fluid’s density to the density of water. It does not affect the head a centrifugal pump can produce (expressed in meters), but it directly impacts the pressure generated and the power required.
GemmeCotti pumps are designed to accommodate different motor powers for the same pump size, allowing them to operate without issues of absorbed power even with high specific gravity liquids.
If the fluid contains suspended solids, it is necessary to define:
Once the fluid is understood, the next step is to define the system’s hydraulic requirements.
This is the volume of fluid that needs to be moved in a given period, typically measured in m³/h, GPM (gallons per minute), or l/s. It is determined by the process needs.
To move the fluid through the system, the pump must supply it with energy. This energy is commonly expressed as head. Head is the height to which the pump can push the fluid and is measured in meters of liquid column (m.l.c.) or simply in meters (m).
A fundamental aspect of head is that it is independent of the fluid type: the same pump will lift different liquids, even with different specific gravities, to the same height.
Pressure, on the other hand, is strictly dependent on the fluid’s density. At the same height (head), a column of liquid will exert a different force depending on its specific gravity. Consequently, a pump that generates a certain head will produce different pressures depending on the liquid it is pumping. For example, the pressure generated when pumping water will be different from that generated when pumping oil at the same head.
As detailed in our previous article, a rigorous NPSH analysis is mandatory. You must ensure that your system’s NPSH available (NPSHa) is always greater than the pump’s NPSH required (NPSHr) to prevent destructive cavitation.
To further explore the difference between these two concepts, we have written a dedicated article on this topic: Pump Pressure vs. Head.
The final set of parameters concerns the pump’s installation environment and intended use.
For hazardous environments where flammable gases, vapors, or dust may be present, a pump certified for that specific ATEX zone is legally required to prevent ignition.
To summarize, all the essential parameters discussed are laid out in the following table. This provides a checklist of the data and variables required for a correct pump selection. It is crucial to accurately define these values to proceed with the identification of the most suitable pump.
The pump selection process is a meticulous engineering task that requires a thorough analysis of fluid properties, system hydraulics, and environmental conditions. By systematically evaluating each parameter—from chemical compatibility and viscosity to total dynamic head and ATEX requirements—you can ensure the selection of a pump that is not only effective but also highly reliable, energy-efficient, and safe. This data-driven approach goes beyond mere guesswork, guaranteeing a robust solution that will serve your process effectively for years to come.
For expert assistance in analyzing these complex parameters and selecting the ideal pump for your application, contact our team at info@gemmecotti.com.
When handling acids and dangerous liquids, safety and reliability are not optional. For industries that depend on the safe transfer of corrosive materials, finding the right chemical pump is a critical decision. GemmeCotti has been the Italian specialist in this field since 1992, engineering advanced mag drive pumps designed for total safety and efficiency. Our innovative mag drive systems represent the pinnacle of leak-proof technology.
The most significant vulnerability in a conventional pump is the mechanical seal, which is the most frequent source of dangerous leaks and costly maintenance. GemmeCotti’s technology solves this problem with a special sealless magnetic drive design.
So, how does it work? The principle is simple:
This core design is what makes mag drive pumps the superior choice for difficult applications.
The innovative design of our mag drive systems offers tangible benefits for any operation requiring a high-performance chemical pump.
To meet the diverse needs of chemical handling, GemmeCotti offers a wide range of mag drive pumps, with each design engineered to provide a reliable and efficient solution.
For a safer, more reliable, and low-maintenance pumping solution, trust the Italian specialists in sealless magnetic drive technology. If your application demands a chemical pump with zero-leak capabilities, our mag drive systems are the perfect choice.
We are ready to find the perfect pump for your needs. Contact us for a free quotation or more information at info@gemmecotti.com or call +39 02 96460406.
he system replaces the dynamic mechanical seal with a static rear casing. This component acts as a solid physical barrier between the process fluid and the external environment, creating a hermetically sealed design that structurally eliminates leak paths for fugitive emissions or hazardous liquid spills.
In any industrial plant, overall efficiency also depends on the ability of each component to operate without interruption. An air-operated double diaphragm pump is no exception; it is the heart of many fluid transfer processes. GemmeCotti has designed and built the ideal pump for this need.
The HAOD pump is a positive displacement pump that uses compressed air as its power source. Inside, two flexible diaphragms move, creating an alternating suction and discharge action. This simple yet effective design allows for the transfer of a wide variety of fluids, from clean, low-viscosity liquids to slurries and liquids containing solids.
Choosing the right model means guaranteeing operational continuity. GemmeCotti’s HAOD series pumps, born from consolidated Italian engineering experience, are designed with three fundamental aspects in mind that make them the ideal choice for the most demanding applications.
The design goes beyond the individual component, considering the entire product from the outset—a cornerstone for achieving total reliability.
When handling aggressive or flammable liquids, safety is not an option. HAOD pumps are intrinsically safer for these applications.
Every application has its challenges. That’s why we have designed a versatile industrial pump capable of adapting to different fluids and conditions.
Reliability, safety, and versatility are the hallmarks of GemmeCotti HAOD diaphragm pumps.
For technical advice specific to your application needs, please contact GemmeCotti directly (info@gemmecotti.com).
GemmeCotti, manufacturer of high-quality chemical pumps, boasts a line of accessories designed to optimize performance, improve safety, and extend the life of your pumping systems. For industries that rely on the safe and efficient transfer of corrosive and hazardous fluids, having the right components is of paramount importance. GemmeCotti’s selection of accessories ensures that your magnetic drive pumps and other chemical industry pumps operate at their best.
Here is a detailed look at the accessories GemmeCotti offers:
The dry-running protection device protects the pump from damage caused by overload, insufficient flow, or dry running. This essential accessory monitors the pump’s operational status and automatically shuts down the motor in the event of dry running, a closed delivery line, or a blocked suction line. This tool, in fact, monitors the motor’s absorption and interrupts the power supply if the set operating thresholds are exceeded. This preventive measure can save significant costs in repairs and downtime, making it a valuable addition to any operation involving chemical pumps.
Main features:
Proper installation is fundamental to the longevity and efficiency of any pump and motor assembly. To ensure a stable and perfectly horizontal foundation, GemmeCotti provides two distinct types of baseplates, designed to meet different operational needs.
GemmeCotti pumps are normally supplied with threaded connections. On request, we can also provide DIN or ANSI flanges for our thermoplastic pumps ( flat stub + free flange), and for AISI 316 pumps, we supply welded DIN or ANSI flanges.
To protect your vertical pumps from solids and debris that can cause internal damage and lead to premature wear, GemmeCotti offers specially designed suction strainers. These 200mm long strainers are easily installed on the pump’s suction port, providing an effective barrier against contaminants and ensuring the smooth operation of your vertical pumping systems.
GemmeCotti’s accessory range includes a variety of bolts and nuts designed for maximum durability. Available in different sizes, these fasteners are engineered to resist corrosion and are perfectly compatible with the aggressive chemicals commonly found in industrial applications. This ensures a secure and long-lasting assembly, guaranteeing optimal performance even in the most demanding environments.
Sizes:
M16x110
Max tightening torque: 15 Nm
Material: PVDF
M12x50
Max tightening torque: 7 Nm
Material: PVDF
M10x25
Max tightening torque: 4,5 Nm
Material: PVDF
Accurate pressure monitoring is crucial for both safety and process control. GemmeCotti’s diaphragm seal pressure gauges are designed to provide reliable readings while being protected from the aggressive media being pumped. Available in both polypropylene (PP) and PVDF, these gauges ensure that corrosive fluids do not come into direct contact with the sensitive pressure measurement instruments.
For applications in potentially explosive atmospheres (ATEX Zone 1), precise temperature monitoring is a critical safety requirement. The PT100 thermoprobe offered by GemmeCotti is a high-precision temperature sensor that allows for the safe and accurate monitoring of pump temperatures in these demanding environments.
To minimize downtime and simplify maintenance, GemmeCotti offers spare parts kits. The WE (Wet End) and RWE (Rear Wet End) kits include all the necessary components that come into contact with the pumped fluid. Having these kits on hand allows for quick and efficient replacement of wearable parts, ensuring that your mag drive pumps and other chemical pumps are back in service with minimal interruption.
GemmeCotti offers a wide variety of accessories that can be supplied together with our industrial pumps to provide a complete and reliable solution for your specific needs.
For more information and to find the perfect components for your application, please do not hesitate to contact us at info@gemmecotti.com. We also invite you to visit our website to explore the full range of accessories: https://gemmecotti.com/accessories/.
At GemmeCotti, we specialize in designing and manufacturing high-quality chemical pumps for a wide range of industrial applications. Our commitment to innovation and excellence has led to the development of a comprehensive range of pumps, including our renowned self-priming mag drive pumps, designed to handle even the most corrosive and dangerous liquids safely and efficiently.
We are excited to introduce the latest addition to our pumps: the new self-priming magnetic drive turbine pump HTT-SP 12000.
The new HTT-SP 12000 offers a flow rate of up to 7 m³/h and a head of up to 36 m, making it one of the most efficient pumps in its class. This latest innovation is proof of our continuous dedication to meeting the evolving needs of our customers.
A key feature of the HTT-SP 12000 is its self-priming capability. The pump can achieve a suction lift of up to 5 meters with water at ambient temperature, ensuring reliable and consistent operation, even in challenging conditions. The pump casing is made from a solid block of PP, while the impeller is constructed from PVDF, guaranteeing maximum chemical resistance and durability when handling aggressive liquids.
The HTT-SP 12000 is equipped with a range of features designed to deliver optimal performance and longevity. These include:
To provide a complete and customized solution, we also offer a variety of optional accessories for the HTT-SP 12000, such as DIN or ANSI flanges and a custom baseplate. You can explore all the available options on our accessories page to create the perfect pump configuration for your needs.
Furthermore, for applications in potentially explosive atmospheres, the pump is also available in an ATEX version for use in Zone 2 areas (model EM-T SP PP/PVDF).
The new mag-drive turbine pump model HTT-SP 12000 is more than just a pump; it’s a solution engineered for reliability, performance, and safety. Whether you are in the chemical, pharmaceutical, or water treatment industry, our chemical pumps are designed to meet your specific needs.
To learn more about the new self-priming mag drive turbine pump model HTT-SP 12000 and to explore our full range of self-priming and mag drive turbine pumps, we invite you to discover the HTT-SP series on our website or to contact us for more information at info@gemmecotti.com.
Follow our pumps experts Mark & Rock to discover our chemical world in a new, fun way!
