How can you prevent dry running of pumps?

14 July 2015

To safeguard magnetic drive pumps against damage caused by insufficient liquid, GemmeCotti offers the Emirel A1-13-Y dry-running protection device. Specifically designed for these pumps, this device prevents dry running, closed discharge, and blocked suction scenarios. Its adjustable threshold and timer allow for customization of minimum power and operational time settings. If power falls below the set value, the pump is automatically stopped, ensuring protection. This device is especially valuable during tanker unloading operations and in any application where liquid shortage poses a risk.

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

What happens when a pump runs dry?

When a pump works without fluid there is a sudden increase of the internal temperature with destructive results of some pump parts. For example, when a plastic pump (in PP or PVDF) runs dry, the main damage occurring are:

1- the shaft in ceramic may break due to a thermal shock.

2- the rotating bushing may block on the shaft.

3- melting of some plastic parts (impeller, rear casing, internal magnet etc.) due to the sudden temperature rise.

How is it possible to prevent dry running?

To avoid the inconvenience of the dry running you can simply install a dry running protection device which stops the pump immediately in case of danger of dry-running. As a matter of fact, the device checks constantly the active power of the motor, which is the minimum value of the instantaneous power absorbed by the pump, through the reception of information about the voltage, the cosφ and current variations. Through a set point and a timer, which are adjustable, it’s possible to set the minimum power and the triggering time of the device. If the power goes under the established value, the pump stops and the device must be switched on again manually. In case of continuous intervention on the apparatus, check the presence of liquid and/or the correct functioning of the plant to find the cause of working of the device.

Click here to find out more.

Live from Achema 2015, GemmeCotti stand

17 June 2015

The international exhibition for chemical engineering and process industries ACHEMA 2015 in Frankfurt has just started and our personnel is ready to meet you at our stand HALL 9.0 B58. You can see the complete range of pumps and have the chance to talk to the General Manager to find out the best pumping solutions for your applications.

We are waiting for you at Achema 2015!

8 April 2015

Don’t miss the chance to visit our stand HALL 9.0 STAND B58 at ACHEMA 2015!

This important international exhibition for chemical engineering and process industries will take place from 15th to 19th June 2015 in Frankfurt (Germany). Meet us there and you will have the chance to see the entire chemical pump production and to find out more about our new products such as for example centrifugal mag drive pumps series HCM with capacity up to 130 m3/h, mag drive vane pumps model HTP designed for high differential pressure and very low temperatures and portable pump model H-IBC suitable to unload tank trucks IBC containers.

Mag drive centrifugal pumps series HCM are made of thermoplastic materials (PP or PVDF) and are highly resistant to chemicals, pressure and temperatures thanks to the strong structure of the pump head which is machined from a solid block.

Mag drive vane pump series HTP are made of stainless steel AISI316 and are suitable to pump hydrocarbons, cryogenics, radioactive liquids and other chemicals. The mag drive design allows a safe work without risks of leakage and emissions.

Portable pump series H-IBC is a mag drive centrifugal pump in plastic which is place in a structure that you can move easily.

Visit our website www.gemmecotti.com for more information!

Mag drive centrifugal pump HCM

Portable pump H-IBC

Mag drive vane pump HTP

Will you visit Expo? Contact us!

27 March 2015

2015 is a very important year for us since the city of Milano, which lies few kilometers south of our factory, will host the Universal Exhibition EXPO MILANO 2015. From 1st May to 31st October the city will become the global showcase where participants from all over the world will exchange ideas and solutions on the main theme of the exhibition: FOOD.
GemmeCotti wants to offer the unique chance to meet us at our factory in Ceriano Laghetto and to get to know better our pumps while you are in the area to visit Expo. We can help you during your stay, supporting you with transportation and hotel reservations. Contact us at least two weeks before your trip to Italy and we will be glad to organize a meeting with you and to welcome you at our factory.
Click here if you want to find out more about EXPO 2015!

Do you know that GemmeCotti pumps can be used in car washing machines?

23 February 2015

GemmeCotti pumps are used in many industries for different applications among which also car washing plants. Chemical pumps in car washes are installed with the main purpose of dosing and spraying water containing detergents and chemicals of various kinds through high-pressure jets. So it is necessary to use an efficient and reliable high-pressure pump to guarantee clean and shiny vehicles.

Our experience in car washes

We have a lot of experience in this particular field and recently we have worked on a new project which required a pumping equipment with very high pressure for a wheel rim cleaning system in a car wash machine. The customer required a pump suitable to transfer a detergent from a 40-liter-tank to the oscillating jets of the machine. The fundamental requirement for the pump was the discharge pressure which had to be at least 6 bar. We studied carefully the application and in the end we proposed our metallic rotary vane pump series HTP that can reach a maximum pressure of 13 bar.

High pressure vane pumps for car washing machines

The pump model HTP that we selected for the application is a positive displacement pump with vanes made of stainless steel AISI316. In this pump the vanes in graphite are mounted in a rotor and they move inside a cavity sliding into and out of the rotor. In this way the fluid is pumped outside the pump with a pressure up to 13 bar and a maximum flow of 2000 l/h. Click here

Mag drive vane pump HTP

to watch how a vane pump works.

Vane pumps model HTP in AISI 316 are suitable for detergents, hydrocarbons, solvents, heat transfer oils, refrigerants and cryogenics or other thin no-lubricating liquids. Thanks to the mag drive design these pumps are useful for low flow and high pressure applications such as car washes, pilot plants, sampling, flushing of mechanical seals and cooling units.

How does a mag drive rotary vane pump work?

3 February 2015

In a magnetic drive rotary vane pump two pumps design are combined together: the sealless magnetic coupling and the positive displacement system with vanes.

With the magnetic coupling the torque is transmitted through contactless magnetic forces from the external magnet which is coupled to the motor shaft to the internal magnet which is connected to an impeller or rotor. This design ensures a hermetic and reliable separation between the pump and the motor making it the best solution when pumping chemicals and acids because it prevents leakage and emissions.

A rotary vane pumping system consists of vanes mounted in a rotor that rotate inside a cavity. When the rotor moves thanks to the above mentioned mag drive system, the vanes slide into and out of the rotor creating vane chambers that do the pumping work.

For further information you can watch the video below or visit our website

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