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Optimize performance with GemmeCotti’s pump accessories

14 Luglio 2025

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:

Dry Running Protection Device

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:

Single Phase CURRENT RELAY
Multirange 15-35A
2 set points MAX/min
Also for motors with INVERTER
Direct insertion TA through
LCD Display

Baseplates

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.

Baseplates in PP (Polypropylene): GemmeCotti baseplates for horizontal pumps are made of PP and they are suitable for motors B3/B5 IEC and NEMA from 0,12 kW to 4 kW.
The baseplates are available in 3 different dimensions (type “A”, type “B” and type “C”).

Metallic UPN baseplates: We can supply UPN baseplates as an optional for our chemical horizontal pumps, both magnetic drive (PP/PVDF/AISI 316) and mechanical seal (PP/PVDF). These baseplates provide added rigidity and ensure a secure, long-lasting installation for your chemical pumps.

Flanges

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.

Suction strainers for vertical pumps

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.

Corrosion-Resistant PVDF Bolts and Nuts

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

Diaphragm seal pressure gauges

diaphragm seal pressure gauges

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.

High-Precision PT100 Thermoprobe for ATEX environments

PT-100-THERMOPROBE

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.

Spare Parts Kits (Wet End and Rear Wet End)

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.

spare parts kit

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://www.gemmecotti.com/accessories/.

New HTT-SP 12000 pump: discover the latest in self-priming mag drive turbine pumps

14 Luglio 2025

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.

Characteristics and advantages

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.

Technical specifications

Available materials: the casing is machined from a solid PP block, with a PVDF impeller.
Materials in contact with the liquid:
- Pump o-ring: EPDM (standard for PP pumps) / VITON (standard for PVDF pumps)
- Static shaft: ceramic Al₂O₃ 99.7%
- Bearing: PTFEC
Maximum flow: 7 m³/h
Maximum head: 36 m
Maximum temperature: PP 60°C – PVDF 90°C
Maximum viscosity: 45 cPs
Pressure rating: NP 5

The HTT-SP 12000 is equipped with a range of features designed to deliver optimal performance and longevity. These include:

High-torque magnetic coupling: ensures a reliable and leak-free functioning, a defining feature of our mag drive pumps.
Chemically resistant bearings: The PTFE/carbon sleeve bearings provide excellent resistance to chemical corrosion, extending the pump’s service life.
Direct starting motors: for simple and efficient operation.

Optional and customizations

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.

Cavitation in chemical pumps: causes and solutions

6 Marzo 2025

Cavitation is a phenomenon that can seriously compromise the efficiency and lifespan of acid pumps, causing damage and production interruptions. In this article, we will explore cavitation, its causes, consequences, and, most importantly, how to effectively prevent it.

What is Cavitation?

Cavitation occurs when the pressure of the liquid inside the pump drops below its vapor pressure. This causes the formation of vapor bubbles, which then implode violently when they reach areas of higher pressure. These implosions generate shock waves that damage the internal surfaces of the pump, causing erosion, vibrations, and excessive noise.

What are the causes of cavitation?

Several factors can contribute to the cavitation in acid pumps:

Low suction pressure: If the pressure at the pump inlet is too low, the liquid can easily vaporize, triggering cavitation.
High liquid temperature: High temperatures reduce the vapor pressure of the liquid, increasing the risk of bubble formation.
Obstructions or restrictions in the suction system: Air leaks, clogged filters, or pipes that are too small can reduce the pressure at the pump inlet.
High liquid velocity: Turbulent flows and excessive speeds can create low-pressure zones within the pump.

What are the consequences of cavitation?

Cavitation can have serious consequences for acid pumps and the entire production process:

Damage to the pump: damage to the impellers, pump head, and other internal components, resulting in reduced pump efficiency and lifespan.
Vibrations and noise: The implosion of the bubbles generates vibrations and excessive noise, which can further damage the pump and create an unsafe work environment.
Loss of performance: Cavitation reduces the flow rate and the pump head, thereby compromising process efficiency.
Production interruptions: Pump failures due to cavitation can cause unexpected and costly downtime.

Fortunately, there are several strategies to prevent or mitigate cavitation in industrial pumps.

How can cavitation be avoided?

Increase suction pressure: Ensure that the pressure at the pump inlet is sufficiently high by, for example, installing the pump closer to the supply tank.
Reduce liquid temperature: If possible, cool the liquid before it enters the pump.
Eliminate obstructions and restrictions in the suction system: Regularly check filters, pipes, and valves to ensure smooth flow.
Select the correct pump: Choose a pump specifically designed to handle corrosive liquids and ensure it is properly sized for the application.
Maintain the pump in good condition: Regular inspections and maintenance are essential to prevent cavitation problems and ensure the longevity of the pump.

Cavitation is a serious problem that can compromise the efficiency and lifespan of acid pumps. By understanding its causes and taking appropriate preventive measures, it is possible to avoid costly damage and ensure optimal operation of the pumps and the entire production process.

GemmeCotti specializes in designing and manufacturing pumps for acids and corrosive liquids. Trust our expertise and contact us for solutions that guarantee efficiency and long-lasting performance.

Our environmental commitment: towards a more sustainable reality

4 Marzo 2024

Environmental sustainability has increasingly become a priority, and given its undeniable importance, here at GemmeCotti, we are undertaking a series of targeted initiatives to reduce our environmental impact and promote a sustainable approach. In our small way, we are particularly keen on actively contributing to the environment and raising awareness among our staff so that they can take positive action within the company and in their daily lives.

Here are the first actions we have recently taken to follow our environmental sustainability model.

1- New GemmeCotti headquarters

At the end of 2023, we permanently moved to our new 2500-m2 headquarters on two floors. The construction of this new factory provided an opportunity to change perspectives and start adopting measures to minimize the environmental impact of our company. The structure was designed to optimize energy efficiency, using materials with a reduced environmental impact, and integrating sustainable heating and cooling systems.

2- Solar Panels

Another significant step towards greater sustainability was the installation of 140 solar panels. On our new premises in Cesate, we have implemented a photovoltaic system to power the production of clean, renewable energy, and also to become self-sufficient in energy production for our daily activities and the construction of our chemical pumps.
The photovoltaic system will allow us to significantly reduce our impact in terms of CO2 production by completely abolishing the use of methane gas. In addition to reducing our carbon footprint, this choice demonstrates our real commitment to using sustainable resources to power our work. We’re proud that our production will become zero-impact.

3- Commitment to Waste Sorting

Promoting waste sorting within the company is another integral aspect of our environmental sustainability model. For example, we have implemented waste management systems that encourage the separation and recycling of materials, thereby reducing the accumulation of non-recyclable waste. This practice reduces environmental impact and helps to raise awareness among employees of the importance of responsible waste management.
We are also implementing packaging recovery and recycling policies that will be appropriately marked on the packaging itself so that our customers can become aware that the packaging has been recycled.

4- Our “GemmeCotti” Tree in Cameroon

04° 57′ 39.32″ N 11° 51′ 5.48″ E: this is where we planted our cocoa tree with a subscription to the International magazine for a daily update of all employees on various economic and political developments.
Its scientific name is Theobroma cacao, but you can call it GemmeCotti. Born in Cameroon on April 4, 2022, our tree represents another step in our commitment towards a greener and more responsible future.

Cocoa tree Cocoa tree-Camerun

Last year was a turning point for us at GemmeCotti. Through the use of renewable energies, a new eco-friendly headquarters, and sustainable waste management practices, we have changed our corporate perspective towards greater responsibility and environmental sustainability, as well as producing for 30 years now magnetic drive pumps that ensure zero leakage and zero emissions into the environment.

This is just the beginning. We already have several projects in store for the future, and we will share them with you very soon!

A GREAT EXPERIENCE AT THE EUROPEAN PARLIAMENT FOR GEMMECOTTI

30 Novembre 2023

On 14th November 2023, our company was invited to the 6th edition of the European Parliament of Enterprises™ that took place in the hemicycle of the European Parliament in Brussels.
Our CEO Mr Enrico Gemme decided to participate in this interesting experience and he had to debate and vote on some of the most crucial topics for businesses on the EU agenda.
There were entrepreneurs from all over European countries who had the unique opportunity to have a direct debate with high representatives of the EU institutions.

This event was organized into 3 main sessions in which all the businessmen and businesswomen were asked to give their opinions and vote 5 key questions directly related to the topic of the session:

First session – Unlocking the potential of the single market for skills and human capital
Second session – Navigating the energy crisis
Third session – Strengthening Europe’s competitiveness in uncertain times

It was an educational and very interesting experience that has given many points for reflection on crucial topics and every businessman and woman got a chance to become a Member of the European Parliament for one day.

We enjoyed it and we hope to be invited to the next edition!

Centrifugal pumps: characteristics and functioning

24 Luglio 2023

Centrifugal pumps are used in a very wide range of industries, from chemical-petrochemical to textile to water treatment, electronic, etc.
If you are looking for accurate and specific information regarding centrifugal pumps, you are in the right place! In the following paragraphs, in fact, we are going to explain their characteristics and how they work.

Centrifugal pumps: classification

Based on the position of the drive shaft that moves the impeller, there are two types of centrifugal pumps:

horizontal pumps
vertical pumps: suitable for applications where installation of the pump semi-submersed in the liquid is required (tanks, reservoirs, sumps etc.)

Horizontal centrifugal pumps can be installed:

above the fluid level: in this case, the pump has to be self-priming
below the fluid level: the pump is installed below the liquid level so it is flooded

Centrifugal pumps are composed of an impeller, assembled on the motor shaft, which rotates inside the pump head. The liquid enters in the axial direction but different types of pumps have different outflow directions:

Radial flow pumps (most common)
Axial flow pumps
Mixed flow pumps

Centrifugal pumps: components

The main components are:

the pump head (or pump casing)
the impeller, which is connected to the motor shaft. You can choose between different types of impellers for centrifugal pumps: open, which is used with liquids with a higher concentration of impurities; closed, when there is a smaller percentage of suspended solids; semi-open etc.
the shaft
the motor
Sealing system to prevent liquid leakage between the pump head and the shaft

There are different types of sealing systems, such as:

mechanical seal pumps, in which the pump shaft, connected to the impeller, exits to the outside to be connected to the motor, and a mechanical seal is installed to ensure sealing
mag drive centrifugal pumps in which the external magnet is assembled directly on the motor shaft and it transmits motion to the impeller by means of an internal magnet through magnetic force. In this case, the shaft does not pass to the outside of the pump.

The external magnet placed on the drive shaft transmits the motion to the internal magnet connected to the impeller which rotates and moves the fluid through the pump. So the containment rear casing contains the internal magnet mentioned above and it ensures a hermetic seal on the hydraulic part of the pump, keeping it separated from the motor.

The figure below shows the main components of these pumps:

Centrifugal pumps: functioning

How does a centrifugal pump work? Operating curves and graphs can be used to describe their performance and area of work.
For a centrifugal pump, the performance curves can be seen in graph 4.1 while graph 4.2 shows the case of a positive displacement pump:

graph 4.1 graph 4.2

The top graph in both figures describes the head variation given by the pumps as the flow rate changes. The best performance is recorded by working centrally, both on the x-axis and y-axis. So between 2 and 2.5 m3/h and between a head of 4 and 5 m.

For the proper functioning of a centrifugal pump plant, it is necessary to verify that the NPSH available in the plant is higher than the NPSH required by the pump.

We will not expand on the explanation of NPSH here but you can refer to the following link: https://www.gemmecotti.com/npsh-a-brief-explanation/

GemmeCotti centrifugal pumps

GemmeCotti can supply four different models of mag drive pumps and one model of mechanical seal pumps:

HTM PP/PVDF and HCM PP/PVDF – MAG DRIVE CENTRIFUGAL PUMPS

thermoplastic pumps made in PP or PVDF
capacity up to 130 m3/h
head up to 48 mlc
HTM : injection molded parts – HCM: casing machined from a block

HTM SP – SELF-PRIMING MAG DRIVE CENTRIFUGAL PUMPS

thermoplastic pumps made in PP or PVDF
capacity up to 25 m3/h
head up to 22 mlc
injection molded parts
self-priming up to 6 m

HTM SS 316 – AISI 316 MAG DRIVE CENTRIFUGAL PUMPS

thermoplastic pumps made in AISI 316
capacity up to 32 m3/h
head up to 24 mlc

HCO – MECHANICAL SEAL CENTRIFUGAL PUMPS

thermoplastic pumps made in PP or PVDF
Flow up to 130 m3/h
Head up to 48 mlc

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