It has been an extraordinary year filled with new projectsfor GemmeCotti, and now our team deserves some well-earned rest. However, our main priority remains unchanged: ensuring continuous presence and support for all our clients.
August Schedule & Sales Support
Please be informed that the GemmeCotti manufacturing facility and workshop will be closed for the summer break from August 8th to August 23rd, 2026.
To ensure continuous service for our global partners, our sales and technical support office will remain fully available throughout this period.
Continuous Assistance & Technical Support
While our factory pauses production to allow for routine maintenance and summer holidays, our team continues to support your industrial fluid handling needs without interruption.
Quotes & Inquiries: Our sales department is fully operational to provide fast quotes and product documentation.
Technical Advice: Need assistance selecting the right pump? Our engineers are available to help.
Order Planning: We recommend placing urgent spare parts or pump orders early to schedule post-closure delivery efficiently.
For any immediate inquiry during August, please reach out via our official mail adress: info@gemmecotti.com
We wish all our clients and partners a wonderful summer and happy holidays. Let’s recharge our batteries to restart even stronger and with new ideas!
In the chemical pumping sector, choosing the correct technology is fundamental to guarantee safety, efficiency, and operational continuity. Series HTT regenerative magnetic drive turbine pumps by GemmeCotti are the solution for those who need to handle highly corrosive and clean liquids with maximum reliability.
How does a magnetic drive turbine pump work?
HTT pumps combine the advantages of the regenerative turbine with the innovation of the magnetic drive. Unlike traditional pumps, the transmission of motion occurs through magnetic forces, completely eliminating the use of mechanical seals.
The main advantages of the HTT series turbine pumps include:
Zero leaks: The absence of mechanical seals drastically reduces the risk of dangerous emissions into the environment and maintenance costs.
Maximum safety: Ideal for fluids that must not come into contact with the environment.
Cavitation resistance: Thanks to their design, these pumps can pump liquids with a gas presence of up to 20%.
Reversibility: One of the distinctive features of the HTT series is its complete reversibility.
Designing systems for corrosive liquids requires extreme flexibility, and HTT pumps allow the configuration to be adapted to real operational needs.
– Flow reversal: It is possible to reverse the suction and delivery ports (in & out) simply by reversing the motor’s direction of rotation.
What are the best materials for pumping highly corrosive liquids?
HTT pumps are made of molded thermoplastic materials (PP and PVDF), chosen for their excellent chemical compatibility.
PP (Polypropylene): Ideal for a wide range of chemicals, it supports temperatures up to 60-70°C.
PVDF: Indicated for heavier-duty applications, with a thermal resistance up to 90°C.
Internal components: The static shaft is made of 99.7% pure alumina, while the bushings are in graphite-filled PTFE to guarantee high chemical resistance.
Performance and technical data of the HTT range:
The HTT range offers versatile performance for different industrial needs:
Maximum flow rate: Up to 9 m³/h.
Maximum head: Up to 48 mcl.
Maximum viscosity: Up to 45 cPs.
Nominal pressure: PN 6 at 20°C.
FAQ
FAQ:
Can regenerative turbine pumps pump liquids with gas? Yes, the HTT series is designed to handle liquids with a gas presence of up to 20%, effectively resisting cavitation phenomena.
What is the difference between a magnetic drive pump and one with a mechanical seal? The main difference lies in the sealless design of magnetic drive pumps. While a traditional pump uses a mechanical seal subject to wear and potential leaks, the magnetic pump guarantees a hermetic seal thanks to a magnetic coupling. An external magnet, driven by the motor, transmits motion to an internal magnet through a containment shroud, eliminating any possible leakage of the liquid and guaranteeing zero emissions into the environment.
Can I use the HTT pump in zones with an explosion risk? Certainly. As an option, the ATEX version is available (model EM-T in PP or PVDF) suitable for zone 2 II 3G.
What connections are available for these pumps? As standard, HTT pumps feature GAS threaded connections. Upon request, they can be supplied with NPT connections or DIN or ANSI 150 flanges.
What happens if the pump runs dry? Dry running can damage internal components. For this reason, as an option, GemmeCotti recommends installing a device against dry running to protect the integrity of the pump.
Scrubbers play a vital role in implementing emission control systems in compliance with ESG regulations, and their efficiency depends almost entirely on the performance of the installed chemical pumps.
In this guide, we will explain how a wet scrubber works and outline the challenges faced by the chemical pumps used in air pollution control systems.
What is a wet scrubber and how does it work?
A wet scrubber is a system designed to remove particulate matter and harmful gases from industrial exhaust streams. The process involves a “washing” phase in which the gas to be purified comes into contact with a liquid — usually water or a water-based chemical solution — that absorbs or neutralizes pollutants.
The working cycle:
Gas intake: the contaminated air enters the wet scrubber chamber from the bottom.
Liquid injection: centrifugal pumps move the washing liquid to the upper part of the tower, where it is sprayed downwards.
Absorption: as the gas rises, it meets the liquid droplets. Pollutants are transferred from the air to the fluid.
Recirculation: the “dirty” liquid is collected in a tank and recirculated by the pump into the system, or sent for treatment.
Common fluids and industrial applications
Wet scrubbers are versatile and used in various sectors to manage aggressive chemicals:
Neutralization of acid fumes: use of caustic soda or lime to remove hydrogen sulfide, hydrochloric acid, or sulfur dioxide.
Gas depuration: use of monoethanolamine (MEA) to remove carbon dioxide.
Particulate removal: simple water-based washing for dust control.
Why choose GemmeCotti chemical pumps for air treatment?
Our pumps are specifically designed to meet the demanding requirements of the air treatment and flue gas cleaning industries.
Choosing GemmeCotti pumps means investing in long-term reliability: thanks to the use of corrosion-resistant thermoplastic materials such as Polypropylene (PP) and PVDF, we guarantee superior chemical resistance compared to traditional metals, drastically reducing maintenance costs and plant downtime.
HCO mechanical seal centrifugal pumps are the most suitable solution for applications requiring the pumping of liquids with suspended solids. Their semi-open impeller design allows for the handling of dirty fluids (non-abrasive solids – max. 5% – max. size 3 mm).
HVL vertical pumps are available with various column lengths, from 500 mm up to 2000 mm.
Technical data:
– Flow rate up to 130 m³/h
– Head up to 48 mlc
Selecting the right pump is essential to ensure process safety. Contact us at info@gemmecotti.com for a personalized consultation: we will help you identify the most suitable model and materials for your specific operating requirements.
FAQ
What is the best material for a wet scrubber pump?
The choice depends on the chemical being handled. Polypropylene (PP) is excellent for many acids and alkalis at moderate temperatures. PVDF is preferred for higher temperatures or highly concentrated chemicals.
Can I use a magnetic drive pump if there are solids in the liquid?
Generally, no. Magnetic drive pumps are designed for clean liquids, as particles may affect their service life or compromise long-term reliability. If the application involves the removal of dust or particulate matter, we recommend our HCO series with mechanical seal or vertical pumps HV /HVL model.
How can I prevent cavitation in wet scrubber pumps?
Ensure that the NPSH available in your system is higher than the NPSH required by the pump. Our technical department can assist you with the correct sizing calculations. Contact us at info@gemmecotti.com
What is the advantage of a vertical pump in a wet scrubber system?
Vertical pumps can be installed with the column directly immersed in the fluid and are capable of handling liquids containing solids. This makes them an ideal solution for wet scrubber systems.
Data centers are facing an increasingly complex challenge: cooling microprocessors of growing power and high density. With the rise of artificial intelligence, cloud computing, and high-performance computing, traditional air-cooling systems are no longer sufficient. For this reason, more and more data centers are being equipped with liquid cooling systems, which allow heat to be dissipated directly from the source: the microprocessors.
In these systems, circulation pumps play a fundamental role, as they ensure the constant flow of coolant within the cooling circuits.
GemmeCotti’s magnetic drive centrifugal pumps, available in PP, PVDF, and AISI 316 stainless steel, represent a reliable and efficient solution for various data center cooling technologies.
What is the purpose of a cooling pump in a data center?
The primary function of the pump is to manage the recirculation of the cooling medium (liquid) throughout the entire circuit. This process is vital for dissipating the heat generated by electronic equipment and servers which, in the absence of constant flow, would suffer critical overheating.
A thermally uncontrolled environment leads to serious risks, including:
Hardware failure and reduction of component lifespan.
Data loss and service interruptions (downtime).
Increased energy costs, as the entire system must work with greater intensity to compensate for heat accumulation.
How pumps work in data center cooling systems
In cooling systems, pumps ensure the continuous flow of coolant within the cooling circuit. The liquid removes the heat generated by the microprocessors and carries it to a heat exchanger for dissipation.
The fluid used can be water, water-glycol mixtures, or specific dielectric fluids for electronic cooling. Regardless of the liquid type, the pumps must guarantee reliable and continuous operation, avoiding leaks and minimizing maintenance interventions.
GemmeCotti magnetic drive pumps are particularly suitable for these applications because, having no mechanical seal, they guarantee an airtight seal of the hydraulic part, eliminating the risk of unwanted fluid leaks into the system.
GemmeCotti magnetic pumps: reliability and operational safety
Magnetic drive pumps represent a particularly suitable solution for data center cooling systems, where reliability, operational safety, and continuity of operation are fundamental elements.
Elimination of Leaks: Unlike traditional pumps with mechanical seals, magnetic pumps eliminate the risk of fluid leaks thanks to the transmission of movement via magnetic coupling.
Reduced Maintenance: The absence of mechanical seals also reduces maintenance interventions and increases system reliability—essential characteristics for critical infrastructures like data centers that must operate continuously.
Industrial Design: GemmeCotti HTM magnetic drive centrifugal pumps are designed specifically for industrial applications requiring safety, chemical resistance, and continuous operation. They can be integrated into various industrial cooling systems and liquid cooling circuits.
Solutions and materials for every need
The HTM range is available in different materials to adapt to the various fluids used in data center cooling circuits:
HTM Pumps in PP and PVDF: These offer high chemical resistance and are particularly indicated when using aggressive fluids or specific refrigerants. The thermoplastic construction guarantees excellent corrosion resistance and a long operational life.
HTM Pumps in AISI 316 Stainless Steel: These represent a robust and reliable solution for applications requiring greater mechanical resistance and compatibility with different process fluids.
Technical Performance
To meet every need, the HTM PP/PVDF series offers performance at both 50 Hz and 60 Hz:
Max Flow Rate: up to 130 m³/h / 528 USGPM.
Max Head: up to 48 m / 148 ft.
Temperature Range: PP max 60°C (158°F) – PVDF max 90°C (194°F).
Max Viscosity: 200 cSt.
Nominal Pressure: NP 6 bar (90 PSI) at 20°C (68°F).
Thanks to magnetic drive technology, high reliability, and the possibility to choose between different material configurations, GemmeCotti HTM pumps represent an effective solution for data center cooling systems. These components guarantee the necessary precision in fluid handling, absence of vibrations, and total safety against refrigerant leaks.
For more information on GemmeCotti solutions for your cooling systems, contact our technical team at info@gemmecotti.com
FAQ
Which pumps are used in data center cooling systems? Industrial pumps are used in data center cooling systems to circulate the coolant (liquid) in liquid cooling circuits. Magnetic drive centrifugal pumps, such as those produced by GemmeCotti, are highly valued and are the best choice for their reliability and absolute absence of leaks.
Why use magnetic drive pumps in cooling systems? These pumps are ideal because they eliminate the risk of fluid leaks near the servers, as they do not use mechanical seals subject to wear. Furthermore, the absence of seals reduces maintenance and increases reliability, ensuring the operational continuity required for critical infrastructure.
Which GemmeCotti pumps are most suitable for use in cooling systems? HTM magnetic drive centrifugal pumps in PP, PVDF, and AISI 316 stainless steel are reliable solutions for industrial cooling systems and liquid cooling circuits. With flow rates from 0.1 m³/h to 130 m³/h, they are the best choice for every need.
In the field of pumping corrosive and hazardous liquids, safety is not an option but an absolute necessity. Chemical fluid leaks can cause environmental damage, risks to operators, and costly downtime. The GemmeCotti HTM series was developed to meet these challenges, offering a zero-leak solution thanks to its magnetic drive design.
In this guide, we will explore how it works, its advantages, and how to choose the ideal configuration of HTM centrifugal pumps for various industrial processes.
What is magnetic drive and how does it work?
Unlike traditional pumps with mechanical seals, GemmeCotti HTM series pumps use an innovative design without a mechanical seal. In a magnetic drive pump, there are two magnetic couplings: the outer magnet, mounted on the motor shaft, and the inner magnet, which allows the impeller to rotate and move the fluid.
The two magnetic semicouplings are separated by a containment shell and never come into contact with each other; the inner magnet rotates exclusively through the magnetic field action. The liquid therefore always remains hermetically sealed within the hydraulic part of the pump. This design ensures maximum safety, greater reliability, and excellent efficiency, even in the most demanding applications.
What are the advantages of HTM magnetic drive pumps?
Choosing a GemmeCotti magnetic drive pump means investing in safety, efficiency, and quality.
The advantages that distinguish these acid pumps are:
No leaks or emissions: ideal for handling hazardous chemicals. The liquid always remains hermetically sealed inside the hydraulic section of the pump.
Reduced maintenance: fewer wear components (such as mechanical seals) means lower operating costs, no plant downtime, and long-term savings.
No motor/pump alignment required: the compact design simplifies installation and reduces vibrations.
Maximum reliability: solid construction made of chemically resistant materials (PP, PVDF, AISI 316). HTM series centrifugal pumps are the ideal solution for long-lasting performance, even in heavy-duty conditions.
Long-term savings: pumps designed to last for decades.
High-torque magnetic coupling: these pumps are designed to ensure high torque of magnetic couplings.
Performance and materials: a tailor-made solution for every need
Every industrial application has different requirements. For this reason, the HTM range, from size 4 to 100, offers wide operational flexibility.
Technical specifications
Flow rate: From 0.5 to 130 m³/h (2–528 USGPM)
Head: Up to 48 meters (148 ft)
Chemical compatibility
The choice of material in contact with the liquid is essential for pump durability:
PP (Polypropylene): Excellent for many liquids such as phosphoric acid, ammonia, and caustic soda.
PVDF (Polyvinylidene Fluoride): Ideal for aggressive acids such as sulfuric acid, hydrofluoric acid, sodium hypochlorite, and many others.
AISI 316: Stainless steel suitable for fluids such as diesel, acetone, ethyl alcohol, hydraulic oils, and many others.
In addition to thermoplastic versions, HTM pumps can also be manufactured in AISI 316 stainless steel. This configuration is particularly suitable for demanding industrial applications requiring high mechanical and thermal resistance. The robustness of steel, combined with the safety of magnetic drive technology, makes these pumps the ideal choice for transferring hydrocarbons and solvents with total absence of leaks.
Magnetic drive pumps are the ideal solution for transferring acids, bases, hazardous liquids, flammable liquids, corrosive fluids, and solvents. Thanks to the magnetic drive design, the absence of leaks and emissions into the environment is guaranteed. It is the best way to reduce environmental impact and ensure maximum safety while complying with the strictest regulations.
When should a magnetic drive pump be preferred over a mechanical seal pump?
A magnetic drive pump is preferable when handling hazardous, corrosive, or expensive fluids without solids, as it eliminates the risk of leaks and atmospheric emissions typical of mechanical seal pumps subject to wear.
What maintenance is required for the HTM series?
Thanks to its simplified design, maintenance is periodic and limited. It is recommended to periodically monitor the condition of the bushings and the integrity of the O-rings to ensure maximum efficiency. The inspection interval strongly depends on operating conditions, fluid characteristics, temperature, materials used, and, naturally, operating time.
Are GemmeCotti pumps suitable for liquids with suspended solids?
HTM series pumps are perfect solutions for clean liquids. In the presence of solids, filtration systems or specific configurations must be evaluated to prevent solid particles from entering the pump. If the solids percentage exceeds 2%, it is possible to use a mechanical seal pump from the HCO series.
Can HTM series pumps run dry?
Standard magnetic drive centrifugal pumps are not designed for prolonged dry running, as the liquid also acts as a lubricant for the internal bushings and shaft. The use of automatic shut-off devices or the constant presence of an operator able to promptly stop the pump is recommended. GemmeCotti offers solutions to prevent this risk, such as dry-run protection devices that allow the pump to operate in complete safety.
Mechanical seal pumps with a semi-open impeller, such as the HCO type, are generally used for pumping acids and hazardous liquids when solids are present in the fluid, making it impossible to use magnetic drive pumps. Their semi-open impeller design allows the safe transfer of corrosive liquids even when particulate matter is present.
The mechanical seal in these pumps consists of a stationary ring and a rotating ring mounted on the pump shaft, which is directly coupled to the motor shaft. The two contact surfaces must be lubricated, and this occurs through the pumped liquid itself.
Choosing the right mechanical seal for a centrifugal pump is essential to ensure safety, reliability, and long operational life, especially when pumping corrosive and aggressive liquids.
The GemmeCotti HCO centrifugal pump series, made of PP or PVDF, is available with different mechanical seal configurations designed to meet a wide range of industrial applications and operating conditions.
What seal types are available on HCO pumps?
The GemmeCotti HCO centrifugal pump range offers several sealing solutions, selected according to pump size, operating conditions, and the type of processed fluid. The main seal types available are:
Elastomer Lip Seal – used on models HCO 95-10. This is a very simple and cost-effective solution for less demanding chemical applications with reduced performance.
Single internal mechanical seal with PTFE bellows – adopted on models HCO 110-170. It combines high chemical resistance with excellent reliability thanks to PTFE bellows and the materials used for the seal faces (Standard: SiC / Ceramic; available on request: Graphite / Ceramic).
Single internal mechanical seal with PTFE bellows, available on models HCO 180-200. Generally supplied in SiC / Ceramic, ideal for pumping acids and corrosive liquids under standard operating conditions with a maximum solids content of 3% and particle sizes not exceeding 5 mm. It allows high flow rates up to 130 m³/h.
Double back-to-back mechanical seal – available on models HCO 180-200 for more critical applications. This seal guarantees the highest safety level thanks to a dual sealing system with barrier fluid. It is recommended for dangerous or aggressive fluids, maintaining the same high capacity (up to 130 m³/h) even under severe operating conditions.
What is a single mechanical seal and when should it be used?
A single mechanical seal consists of one sealing interface between the rotating shaft and the pump casing. It is the most common solution in centrifugal pumps for standard chemical applications.
In GemmeCotti HCO pumps from size 110 to 170, the single seal can be supplied in different materials depending on the pumped fluid. The standard version includes stationary and rotating rings in SiC / Al₂O₃, while an alternative stationary graphite ring is available on request.
On models HCO 180 and HCO 200, the seal rings are made of Silicon Carbide / Ceramic, ensuring good wear resistance, operational reliability, and an optimal balance between performance and cost.
Single mechanical seals are particularly suitable when the pumped fluid is not highly hazardous and when operating conditions (pressure, temperature, chemical composition) remain within standard parameters. In such cases, they provide high performance with a simple, economical, and maintenance-friendly design.
Advantages of a single mechanical seal
Simple and compact design
Lower initial investment compared to double seals
Reduced maintenance needs thanks to fewer components
Reliable pumping of acids and corrosive liquids under standard conditions
Typical applications
Transfer of chemicals in industrial plants
Water and chemical wastewater treatment
Standard chemical processes where extra safety is not required
When handling highly dangerous, abrasive fluids or particularly critical applications, a double mechanical seal is recommended for higher safety.
What is a double mechanical seal and why is it suitable for critical applications?
A double back-to-back mechanical seal consists of two seal faces mounted opposite each other inside the seal chamber, with an interposed barrier fluid that ensures proper lubrication and heat dissipation.
This configuration offers a higher safety level and is the preferred solution for heavy-duty and critical applications where a single seal is not sufficient to contain the pumped fluid.
To ensure correct operation, an external flushing system must be provided to supply and circulate the barrier fluid at the required pressure.
On GemmeCotti HCO centrifugal pumps, the back-to-back double seal is particularly suitable for pumping dangerous, corrosive fluids or liquids containing suspended solids up to 5% with particle sizes under 5 mm, as well as abrasive particles, while maintaining high performance and long-term reliability.
Advantages of a double mechanical seal
Greater safety: significantly reduced risk of leakage, especially with hazardous or toxic fluids
Environmental protection: better containment and prevention of contamination
Longer service life: two seals reduce stress on each face, extending durability and lowering maintenance frequency
Reliability in severe conditions: ideal for abrasive fluids, high temperatures, and demanding operating conditions
The choice depends on the liquid type, operating conditions, temperature, and plant safety requirements.
What materials are used in HCO centrifugal pumps with a mechanical seal?
All GemmeCotti HCO centrifugal pumps are made of high-performance thermoplastics, ideal for the chemical industry:
PP (Polypropylene) – excellent chemical resistance, max temperature about 70 °C
PVDF (Polyvinylidene Fluoride) – superior chemical resistance, max temperature about 90 °C
These materials ensure maximum corrosion resistance, long service life, and reliability.
How to choose the most suitable mechanical seal for an HCO pump
When selecting the right mechanical seal, it is important to evaluate:
Chemical characteristics of the pumped fluid
Hazard and toxicity level
Operating temperature and pressure
Required safety level
Maintenance strategy of the plant
For standard chemical services, a single mechanical seal is often sufficient. For dangerous or critical applications, a double mechanical seal is strongly recommended.
Is the pumped liquid clean? Magnetic drive pumps are the ideal solution to guarantee zero leakage and emissions into the environment, with extremely low maintenance. Learn more about the advantages of magnetic drive technology.
For technical support and advice, contact the GemmeCotti team: info@gemmecotti.com
FAQ
1. What is the difference between a single and double mechanical seal?
A single mechanical seal uses one sealing face and is typically used in standard chemical applications where the fluid is not highly dangerous and operating conditions are stable.
A double back-to-back mechanical seal uses two sealing faces with a barrier fluid in between, ensuring higher safety. It is recommended when minimizing leakage risk is crucial, especially with toxic, dangerous, or highly aggressive fluids.
2. Are HCO mechanical seal pumps suitable for corrosive liquids?
Yes. GemmeCotti HCO centrifugal pumps are specifically designed for pumping acids and corrosive liquids. They are made in PP or PVDF, high-performance thermoplastics that guarantee excellent chemical resistance and long operational life even in harsh industrial environments. Seal and gasket materials are selected according to the pumped liquid, temperature, and operating conditions.
3. Which seal is recommended for hazardous fluids?
For hazardous, toxic, or environmentally harmful fluids, a double back-to-back mechanical seal is strongly recommended. It provides extra protection through the barrier fluid, reducing leakage risk and improving safety for both the plant and operators.
4. What is the maximum flow rate of HCO pumps with a mechanical seal?
GemmeCotti HCO mechanical seal pumps can cover flow rates from 0.5 m³/h up to 130 m³/h, with a maximum head of 48 meters. The wide range available ensures the best solution for every application.
5. Can I get support in choosing the right seal?
Yes. GemmeCotti provides specialized technical support to help customers select the most suitable seal configuration. The choice is based on the pumped fluid, operating conditions, safety requirements, and maintenance needs to guarantee the most efficient and reliable solution.
6. Is a magnetic drive pump or a mechanical seal pump better?
The choice depends on the fluid characteristics and operating conditions.
Magnetic drive pumps are ideal for clean fluids without solids, when zero leakage and minimal maintenance are required.
Mechanical seal pumps, such as the GemmeCotti HCO series, are preferable when the fluid contains suspended solids or abrasive particles, or when high flow rates and more demanding operating conditions are needed.
We are pleased to announce the launch of our new official Instagram profile, @gemmecotti, which offers customers and industry professionals a closer look at our industrial pumps and magnetic drive technology.
We have decided to use this new channel to showcase what has always defined our company: build quality and technological innovation. The new channel will be a dynamic showcase dedicated entirely to our production.
What will you find on our profile?
Our products in the spotlight: we will offer you a unique perspective on our products, showcasing the build quality and technological innovation that characterize them. We will highlight the reliability of the materials we use (PP-PVDF-AISI 316), which are designed to ensure maximum performance and safety.
The value of GemmeCotti service: it’s about more than just products. We will share our team’s commitment to offering comprehensive support services, from technical consulting to after-sales support.
Beyond the product: we will share the vision and principles that guide our business decisions. From our constant pursuit of quality to our focus on sustainable development, this core value is reflected in our production choices and the efficiency of our solutions.
Join our community, follow us on Instagram: @gemmecotti
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:
December 2025: 8th, 25th and 26th
January 2026: 1st, 2nd, and 6th
Please organize your orders accordingly.
We wish you a wonderful holiday season and a happy New Year!
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.
How does the magnetic drive design work?
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:
An external magnet on the motor shaft transmits torque through a stationary rear casing.
This drives an internal magnet, which is hermetically sealed inside the chemical pump.
The internal magnet is connected to the impeller, which moves the fluid.
The rear casing acts as a solid, leak-proof barrier between the hazardous liquid and the atmosphere, resulting in a hermetically sealless design that offers total fluid containment.
This core design is what makes mag drive pumps the superior choice for difficult applications.
Key advantages of our mag drive design
The innovative design of our mag drive systems offers tangible benefits for any operation requiring a high-performance chemical pump.
100% leak-proof performance: our pumps guarantee zero leakage of chemicals and fugitive emissions. This ensures total operator safety and protects the environment from hazardous spills.
Drastically reduced maintenance: with no mechanical seals to wear out or replace, maintenance costs and process downtime are minimized.
High reliability: the simple, robust design of our mag drive pumps leads to a longer service life and dependable performance, even when handling corrosive and dangerous liquids.
Simplified installation: the magnetic coupling removes the need for time-consuming pump-motor alignment, saving time and preventing common installation errors.
Efficient power transfer: a high-torque magnetic coupling ensures that power is transferred from the motor to the pump smoothly and effectively.
Choosing the right chemical pump: our range of mag drive pumps
To meet the diverse needs of chemical handling, GemmeCotti offers a wide range ofmag drive pumps, with each design engineered to provide a reliable and efficient solution.
Mag-drive centrifugal pumps: these are the ideal choice for most standard to high-flow chemical transfer and processing applications where reliability and efficiency are paramount.
Mag-drive turbine pumps: suitable for chemical handling in applications requiring relatively low flow and high head. Turbine pumps are reversible and can pump low-viscosity fluids also containing up to 20% entrained gas.
Mag-drive rotary vane pumps: these are specialized anti-corrosion industrial pumps suitable for pumping a variety of fluids, including hydrocarbons, solvents, heat transfer oils, refrigerants, and even cryogenic or radioactive liquids. These pumps are designed for tasks requiring high pressure at low flow rates, delivering the smooth and steady performance needed for dosing, sampling, and circulation
Trust GemmeCotti for your mag drive pump needs
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.
In the absence of mechanical seals, how is the system’s hermetic isolation from the atmosphere technically guaranteed?
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.
1. Total operational reliability
The design goes beyond the individual component, considering the entire product from the outset—a cornerstone for achieving total reliability.
Advanced anti-stall pneumatic circuit: at the core of our pumps is a proven and efficient anti-stall pneumatic circuit, which ensures smooth and safe operation, even at low air pressures or in slow cycles. This design prevents blockages and ensures constant operation.
Dry-running capability: HAOD pumps can run dry for extended periods without sustaining any damage. This is a crucial advantage for process safety, especially in applications such as drum unloading or tank emptying, where the pump can continue to work even after the liquid has run out.
Robustness against closed discharge: unlike other positive displacement pumps, GemmeCotti HAOD pumps can operate with a closed discharge without problems, increasing safety and operational flexibility within the plant.
2. Intrinsic safety: the best choice for critical environments and hazardous fluids
When handling aggressive or flammable liquids, safety is not an option. HAOD pumps are intrinsically safer for these applications.
ATEX certification: the HAOD series is available in an ATEX-certified version, making it suitable for installation in areas with potentially explosive atmospheres.
Ideal for aggressive liquids and solvents: thanks to their pneumatic operation, they are the perfect solution for pumping solvents and flammable fluids, a fundamental requirement in the chemical and petrochemical industries.
3. Versatility and superior chemical compatibility
Every application has its challenges. That’s why we have designed a versatile industrial pump capable of adapting to different fluids and conditions.
Wide choice of construction materials: chemical compatibility is guaranteed by a comprehensive selection of materials, making the HAOD a corrosion-resistant pump ideal for every need:
Polypropylene (PP) pump: an excellent choice for a wide variety of acids and bases. It is the most common solution for an acid pump.
PVDF pump: offers superior chemical and thermal resistance for the most aggressive fluids and for temperatures up to 95°C.
AISI 316 stainless steel pump: Perfect for applications requiring high mechanical strength or compliance with specific standards, such as in the food and pharmaceutical sectors.
Self-Priming pump: HAOD pumps have excellent dry suction capability, making them outstanding self-priming pumps for drawing fluid from significant heights.
Handles solids and viscous fluids: their design enables them to pump abrasive, viscous, and solids-containing fluids without damage, making them the ideal solution for slurries and particle-laden liquids.
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).
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The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional
Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
