WWW.NOVAROTORS.COM - Progressing cavity pumps, mono pump, wobble pumps and flexible impeller





WE WILL BE CLOSES from 11th to 20th of August 2017







OR SEND US AN FAX +39-0444-888152

We reply at all yours fax and e mail only after 21th of August.









We'll closed for Easter holiday 17th April 2017




We would like to inform you that our offices will be closed for Easter holidays  the 17th of April.


We wish you Happy Easter






Direttiva Bassa Tensione (LVD) 2014/35/EU in rapporto a Direttiva Macchine 2006/42/CE



Confine tra l’applicazione della Direttiva Bassa Tensione (LVD) 2014/35/EU e della Direttiva Macchine 2006/42/CE – Posizione Assopompe

Nuovo Position Paper Assopompe - Direttiva Macchine e Direttiva LVD

Ai fini della legislazione comunitaria, le pompe per liquidi di qualsiasi tipologia, si considerano macchine ed in quanto tali sono soggette ai requisiti della Direttiva Macchine 2006/42/CE. 

Le elettropompe (e in particolar modo quelle destinate a utilizzi in ambiti domestici o similari), sono considerabili anche come dispositivi elettrici destinati ad essere adoperati a basse tensioni nominali e dunque soggette ai requisiti della Direttiva Bassa Tensione (LVD) 2014/35/EU.

Per una pompa si pone dunque spesso la questione di definire quando applicare l’una o l’altra direttiva e soprattutto se e come dichiarare il rispetto di una o di entrambe le direttive.

La Commissione Tecnica Assopompe ha voluto fare chiarezza sul tema con la pubblicazione della position paper allegata.


fonte Assopompe  http://www.anima.it/







01st Jan 2017 - Is mandatory drive from 0,75 up to 375kW only IE3



Premium Efficiency – IE3 will become mandatory in Europe

Standard IEC 60034-30 defines the energy efficiency classes for asynchronous motors. Regulations (EC) 640/2009 and 04/2014 establish the conditions for the conversion to the new energy-efficient technology. IE2 has been in place as the minimum efficiency since 2011. The second stage will now take effect since of January 1, 2017. Only motors in the power range from 7.5 to 375 kW complying with Energy Efficiency Class IE3 will be permitted for line operation in the European Economic Area from that date. This is a legal requirement. January 1, 2017, saw the expansion of statutory provisions on motor efficiency. Since this date, the energy efficiency class IE3 has been mandated for motors with power ratings from 0.75 to 7.5 kW, with laws now covering all motors ranging from 0.75 to 375 kW.

The most important facts about IE3

  • In 2011, the use of IE2 motors was prescribed by law

  • Since 1 January 2015 on, energy efficiency class IE3 will be mandatory for motors from 7.5 kW to 375 kW

  • Since 1 January 2017 on, energy efficiency class IE3 will apply to motors from 0,75 kW to 375 kW


For electric single speed, three-phase 50 or 50/60 Hz squirrel cage induction motor

  • Rated voltage up to 1,000 V

  • Rated power: 0.75 - 375 kW

  • Number of poles: 2, 4, or 6

  • Rated on the basis of continuous duty operation



  • Motors completely immersed in a liquid during operation

  • Motors that are fully integrated into a machine

  • Brake motors

  • other motor types

  • Motors specially designed for operation under the following conditions:
    In force until 26 July 2014
    >1,000 m above sea level
    Ambient temperature > 40°C
    Ambient temperature < -15°C or respectively < 0°C with air cooling
    Cooling liquid temperatures < 5°C or > 25°C 
    Valid since 27 July 2014
    >4,000 m above sea level
    Ambient temperature > 60°C
    Ambient temperature < -30°C or respectively < 0°C with air cooling
    Cooling liquid temperatures < 0°C or > 32°C

Alternative: IE2 motor in combination with frequency converter

IE2 motors will still be permitted in conjunction with frequency converter operation, although the motor starter is always the better alternative at full speed.



Introduction: from Directive EuP to EC Motor Regulation
Directive 2009/125/EC Energy related Products – ErP (and the former version 2005/32/EC ( Eco-design Directive for Energy-using Products – EuP) establish a framework for the setting of general eco-design requirements to be fulfilled by energy-using products in view of increasing the energy efficiency of the products and the level of protection of the environment.
Within the framework of the Directive, specific Regulations have been issued for the setting of design and energy efficiency requirements, applicable to the products included in the scope of the Directive. Amongst these, Regulation 640/2009 EC establishes eco-design requirements for electric motors and their drives, in terms of energy efficiency levels.
Subject matter and scope
Regulation EC 640/2009 is applicable to electric motors, the type and size of which are defined in Article 2.1: single speed, three-phase, squirrel cage induction motors, with 2, 4 or 6 poles, rated voltage up to 1000V, rated power output between 0,75 to 375 kW (rating based on continuous duty).
Motors designed to operate wholly immersed in a liquid and motors completely integrated into a product of which the energy performance cannot be tested independently from the product (e.g. canned motor pumps), as well as motors for special applications (e.g. potentially explosive atmospheres - ATEX) are not included in the scope of the
It follows that:
 submersible motors are excluded (even dry installed).
 deep well submersible motors are excluded
 motors are excluded from the Regulation if they are fully integrated into the pump unit (e.g. canned motor pump).
 motors of all designs of “close-coupled” pumps are covered by Regulation EC 640/2009. This includes motors with all types of shaft extensions and/or flanges.

New efficiency levels
Former efficiency levels were adopted by CEMEP2 as a result of a voluntary agreement based on testing methods and limits of acceptance defined under the IEC 60034-2: 1996. CEMEP efficiency levels were categorised as follows:

EFF3 = low efficiency level
EFF2 = standard efficiency level
EFF1 = high efficiency level

International efficiency levels have been defined in standard IEC 60034-30:2008, based on test methods and limits of acceptance indicated under IEC 60034-2-1:2007, as follows:

IE1 = standard efficiency (similar to EFF2)
IE2 = high efficiency (similar to EFF1)
IE3 = Premium Efficiency

These efficiency levels are listed in Annex I of the Regulation for levels IE 2 and IE 3.
Eco-design requirements and timetable
Eco-design requirements for electric motors shall be applied in accordance to the following timetable:
1. from June 16th, 2011: motors shall not be less efficient than the IE2 level;
2. from January 1st, 2015: motors with a rated output of 7,5 - 375 kW shall not be less efficient than IE3 or meet IE2, if equipped with a variable speed drive;
3. from January 1st, 2017: all motors with a rated power of 0,75 - 375 kW shall not be less efficient than IE3 or meet IE2, if equipped with a variable speed drive.








pubblication: New coating plant for Nova Rotors pump




 Nova Rotors is an Italian company based in Sossano (Vicenza, Italy) manufacturing cavity pumps for the food, environmentand oil & gas industries since 1990. Its strength is the
use of a patented core technology providing for a standardisation of the hydraulic parts on which all
the construction variants of the pumps are based. It may seem a very simple idea, but this eff ort in design,
started in 2009 and completed in 2011 with the start of production, now enables Nova Rotors to off er a
wide range of pumps, all custom designed but with a limited engineering phase – that is, with one of the
highest process effi ciencies levels in the industry. “All over the world market, we are the only ones capable of producing a series of pumps featuring an 8-stage rotor with standard components and
steel micro-castings: our competitors have to resort to a dedicated engineering phase and to expensive
carpentry components, sometimes of poor quality”, Manuele Dal Maso, Nova Rotors’ Technical Manager,
says. “Once our core technology has been defi ned and tested, we have designed all the variants that
enable us to meet any operating requirement for any kind of product, from the most liquid to the
most dense and viscous ones, in the industrial, food, environmental and energy sectors.

Nova Rotors’ approach implies a high level of specialisation in all stages of the production process,
from design to product testing, machining to fi nishing, assembly to certifi cation. The guarantees
of resistance, durability, high performance and, not least, aesthetic quality are the elements determining
the level of satisfaction of the customer. In particular, the recent penetration of the oil & gas market has
resulted in the need for pumps with higher durability levels and coatings with better corrosion resistance
characteristics. “Since when we entered this market, there has been an increase in the demand for coating systems resistant to corrosion class C5 conditions both in marine and industrial environments, as required by the standard ISO 12944”, Dal Maso states.
The importance of this requirement and the need for extreme fl exibility in order to treat pumps with signifi cantly varying dimensions and a low consistency of the batches have prompted the company to make a major plant investment.
The aim was being able to be productive and ensure quality in all working conditions, from the coating of hundreds of 500 mm pumps to the treatment of up to 7 m long submerged vertical pumps.
The cooperation of CM Spray (Carbonera, Treviso, Italy) has played a crucial role in this plant renovation process.
The company has revolutionised Nova Rotors’ application system by installing a new powder centre as well as including an electronic mixing system for two-component coatings and new pneumatic spraying guns. It has also replaced the old coating booth featuring a fi ltering wall with two new pressurised booths that, as will be discussed later, ensure high operational fl exibility, as greatly needed by Nova Rotors.

“Our company was established in 1990 by four members already working in this fi eld and immediately began the production of progressive cavity pumps for sludge treatment operations, the main application of this kind of product,” Manuele Dal Maso states. “These are volumetric pumps whose main feature is the ability to pump even very dense substances, as there are no valves inside it and as the fl ow of the material occurs with a stable pressure and without pulsations. Soon, however, the fi rm’s owners realised that the functionality of progressive cavity pumps could be exploited in a variety of diff erent applications: this has been the key to success for Nova Rotors.”
The cavity pumps manufactured in this plant near Vicenza are now intended for various applications, including waste water purifi cation and treatment, food and wine industry (bread and pasta making, wine extract treatment), naval and oil & gas sectors.

Dal Maso continues: “From the beginning, our business policy has been not to align with the current standards for industrial pumps, all similar in terms of structural and surface characteristics, but to push more and more forward in the realisation of products with an added value compared to those already on the market. Nova Rotors reached a peak of production in 2003, when it started to design and build pumps
intended for specifi c markets. This positive trend has never stopped since then: Today the company boasts a turnover of 9.2 million Euros, more than doubled compared to 2007.”

The real leap forward, however, dates back to 2009, with the new design concept and the new range called
“Diamond”, whose production reached full capacity in 2012. “Our pumps are sold on order based on the
data and parameters provided by the customers about their application needs”, Dal Maso says. “Our
technical department selects the most suitable pump and customises it by combining diff erent
standardised components: Hydraulic components, transmission, rotor, motor, casing and base. The
standardisation we have conceived covers about 95% of the market demands. If we have to respond to
diff erent requirements, we only engineer the special components we need. We have thousands of available combinations of materials, mechanical variants and parameters as a function of the operating temperature and the surface treatment required”.
The launch of the “Diamond” project has led the company to upgrade the production technologies
used in its plant, making a substantial investment also in terms of coating and protection technologies.

Open the pdf link of the article published on ipcm international paint & coating magazine of jan 2015 .

Fonte: http://ipcm.it/






class IE3 will become mandatory for engines from Jan.2015




New Efficiency Classes- IE Codes
Saving energy has become worldwide increasingly important, so that the homogeneity of a universal system for efficiency classification of low voltage three-phase asynchronous motors was necessary. In March 2009, CENELEC (European Committee for Electrotechnical Standardization) which consists of EU countries members with the addition of Iceland, Norway and Switzerland has therefore in this respect implemented the new International Standard IEC 60034-30:2008 “Rotating electrical machines- Part 30: Efficiency classes of single-speed, three-phase, cage-induction motors (IE Code) “ by issuing EN 60034-30:2008.
Standard IEC 60034-30
IT COVERS 50 Hz and 60 Hz single-speed three-phase cage-induction motors that:
  • have a rated voltage UN up to 1000V
  • have a rated output PN between 0.75 kW and 375 kW
  • have either 2, 4 or 6 poles
  • are rated on the basis of either duty type S1 (continuous duty) or S3 (intermittent periodic duty) with a rated cyclic duration factor > 80%
  • are capable of operating direct on-line
  • are rated for operating conditions in accordance with IEC 60034-1, Clause 6
For motors up to 7.5kW the IE2 remains valid until 2017.

  • Motors with flanges, feet and/or shafts with mechanical dimensions different from IEC 60072-1
  • I Geared motors and brake motors, although special flanges or special shafts may be used in such motors.

The following motors are EXCLUDED:

  • 8 poles motors
  • motors made solely for converter operation in accordance with IEC 60034-25
  • motors completely integrated into a machine that cannot be tested separately from the machine.

This standard establishes the new international efficiency classes for three-phase asynchronous motors in:

( this class is currently under consideration)

Efficiency levels in accordance with IEC  60034-30 must be measured applying the method specified in IEC 60034-2-1: direct or indirect.
To determine the efficiency level Cima Spa applies the direct method.

IEC 60034-30 Standard fixes only the requirements regarding efficiency classes, establishing internationally shared measures. Therefore it does not have legislative power and it does not define which motors have to be supplied and their according efficiency level: this is sanctioned by the single legislations in force in the different countries.

US Department of Energy established that starting from 19/12/2010 NEMA ( National Electric Manufacturers Association) Premium requirement becomes the minimum energy-efficiency performance standard for United States motors. In order to obtain this certification, manufacturers will have to have their products tested by accredited laboratories.

Instead, the situation is different in EU countries, since it is the manufacturer’s responsibility to comply with the established standards. A third party certification is not compulsory; however, government agencies will carry out sporadic inspections. In case any device is not in compliance with the prescribed and declared efficiency levels, the manufacturer will be forced to withdraw it from the market at his expense.


Through Directive 2005/32 EC, European Parliament established a framework for the setting of eco-design requirements to be fulfilled by energy-using products, specifying the efficiency levels machines sold on European market will have to reach.

IT COVERS motors defined by IEC 60034-30  and sanctions the obligation to put high efficiency motors on the market according to these dates:

  • IE2 Class from June 16th 2011
  • IE3 Class (or IE2 with variable speed drive) from January 1st 2015 for motors with a rated output of 7.5 kW up to 375 kW
  • IE3 Class (or IE2 with variable speed drive) from January 1st 2017 for motors with a rated output of 0.75 kW up to 375 kW

  • Motors designed to operate wholly immersed in a liquid
  • Motors with duty different from S1 or S3 >80%
  • Motors completely integrated into another product
  • Motors designed for applications in special conditions :
  • Altitude > 1000m
  • Ambient temperature > 40°C
  • Maximum operating temperature > 400°C
  • Ambient temperature < -15°C or < 0°C for air cooled motors
  • Cooling water temperature at product input < 5°C or > 25°C
  • Brake motors
  • Motors on board (street, rails, water)
  • Safety motors in compliance to Directive ATEX 94/9/EC


Link about european Directive


Fonte dell'articolo: Cima motori






Nova Rotors is moving the headquarter in August 2014



Dear customers and suppliers,
As a result of the development process of our company, strongly wished and pursued by the management and our entire staff , we inform you that as of August 4, 2014 our company will transfer its head office and production
from: Villaga (VI) Via Villa 29 36020 (VI) Italy
to Sossano (VI) Via Carlo Cattaneo 19-25 36040 (VI) Italy

Nova Rotors Srl will continue to carry on its business until the end of July 2014 in the current facility in Villaga , at full capacity, while during the first week of August (week 32) we will be able to ensure shipments of replacement parts, but not of pumps, except for those being finalized in July.

In the two weeks 33 and 34 the company will be completely closed for the moving. Consequently we ask for your collaboration so that the discomfort will be minimal for all , anticipating as much as possible the placing of orders, or planning the delivery dates after the end of August.

Besides this little discomfort, we believe that a new company layout , combined with an improved production management will allow us to ensure and enhance the level of quality and service , which in recent years you have recognized us, thus increasing our mutual cooperation.
Company name, phone numbers , fax numbers and e-mail addresses as well as the operational and commercial management of the company remain unchanged.

We kindly ask you to take good note of the above and for any clarification should be needed we remain at your disposal inviting you to call us at our premises.

With our best regards
Carla Dovigo
Nova Rotors S.r.l.






New Highway/motorway A31 exit: Barbarano/Albettone



From today reach our company is now even esier


Highway/motorway A31 New exit:  Barbarano/Albettone

Take only 10 minutes 7 km


Visualizzazione ingrandita della mappa






New wobble pump R40L and R80L



The new series R40L and R80L consists of a stator and a T form stator with patented joints complete range of pumps our wobble pumps.

Made with solid 304 stainless steel, 316 stainless steel and cast iron bodies, are robust and very compact and space-saving. The monobloc also in addition to being directly flanged side motorization allow rapid disassembly and reassembly of all its parts simply by removing the suction port.
Maximum flow rate 13 / ha 1400 rpm with the largest pump R80L, max 3 bar and 9 m
³ / h with engine at 930 rpm max 4 bar.






Pumps for Biogas plant



The series pump DHS for biogas consists of a hopper with screw for mixing and transporting silage towards the fermenter.

The coupling of the pump hopper for the transport of dry matter, with a progressive cavity pump DN for the transport of the part as it were liquid withdrawn from the tanks or in the recirculation from the fermenter allows to have a robust system with low energy consumption and with a low operating pressure .

Removable inlet equipped with a large inspection door.
At request in the pumps for biogas, is supplied with a flange for inlet for slurry/digestate, in order to make pumpable the silage at low concentration of moisture, improving the degree of homogenization. This is better in respect to what would occur with standard mixing in a collection tank. The homogenization reduces the delivery pressure and therefore consumption. In addition, the power supply from the entrance also limits the risk of compaction of the product that would create an obstruction such as to prevent a proper pumping of the same

In the video Below you can see a functioning of our pump system in a Biogas plant installend in Italy of 450 kw


Some of our customer :



Here a site with a complete map about the renewable energies plant also fromo biogas not only in Italy but around the world repowermap


repowermap.org is an initiative to promote renewable energies and energy efficiency by showing real-world examples and related local information in each person's neighbourhood. More and more people, local authorities, regions, companies and organizations are participating. Have you installed yourself a renewable energy system or have you constructed an energy efficient building? Make your example(s) visible on the map to motivate people in your neighbourhood to use these technologies as well - each example counts! Read more about our idea and who supports us






Now On-line Available inquiry form request



Noe It 's possible to make requests for quotation through our website by entering the data into a form that will help you to compile in order to target us for reply with a valid solution for the pumping product.

The form can also be used for requesting the replacement parts or simply for an information request.








Pumps completely St.steel Aisi 316 Diamon Series



Pumps are made entirely of stainless steel AISI 316 IP66 including the engine.

The use of stainless steel makes this series of pumps applicable in all those sectors which require high hygiene. In particular in food, pharmaceutical and chemical industries.

The high hygiene of stainless-steel guaranteed the possibility of more accurate and frequently washing of the environment were are used, avoiding the risk of compromising parts of the electric motor and preventing the deterioration associated with the use of water in their cleaning.









About us web news...



About us ....


Magazine article on South African mining Web about the use of the new pumps Diamond  series on the mines sector together centrifugal pumps in a mining facility in Zambia.

see link of the weekly web news to miningweekly.com


Information about MiningWeekly.com

Mining Weekly is South Africa's premier source of weekly news on mining developments in Africa's most important industry. Mining Weekly provides in-depth coverage of mining projects and the personalities reshaping the mining industry. The publication is an increasingly global source of information for those involved in the mining sector.






New Diamond Series with new patented joint



Nova Rotors presents its new range of progressing cavity pumps called the Diamond Series.
Completely renewed mechanics to increase the performance with a new aggressive design. These pumps are completely reversible. Available a wide pumps range.


• One stage stator with long pitch geometry to improve the performance.
• Reversible flow up to 3 bar as standard: Up to 12 bar with hydraulic balance.
• Pump fixed to motorization with a pin to permit the reversibility.
• Joints: strong and compact with geometry and dimensions projected to enable the max NPSH.
• Transmission shaft with patented pending universal pin joint  with bushing guide and transmission guide to enable long endurance and reliability . This is to reduce to a minimum wearing of the pin.
• The bush prevents the substitution of the transmission shaft, reducing maintenance costs and times.
• Rubber sleeves: designed to increase the long activity, with special geometry. Suitable in case of sharp solids in the medium.
• The universal joint is the same for all the range both for cast iron and SS versions. Only difference is the dimensions and materials.
• The rotating parts are in SS. Can also be produced in other materials.
• Is easy to maintenance but not expensive. Fewer components of smaller dimension under wearing.
• The stator seal is integrated at both ends. No O-ring needed.
stator positioned to prevent rotation, thanks to the body parts.
• Large cross section between stator and body, with smooth design, to increase medium suction
• The standard version has a single mechanical seal. Large spectrum of seal solutions: packing seal, double mech.seal and cartridge.
• Modular bearing housing with taper roller bearings. With blocking nut to regulate the perfect preload.
• Easy maintenance of the bearing, considering the compact dimensions. Integrated lubrication system easy and efficient.
• Large solution range for the pump body, outlet flange in order to insert any measuring devices.
• Rotor: available coating and thermal treatments for the management of heavy applications.
• Certifications: Atex and API 2010; food grade certif. 2011.
• Rational codes for Diamond series refer to the capacity at 400rpm.
Compact design with a good relationship quality/price. Easy installation thanks to the reduced dimensions.







Availables 2 new size 510L1 and 520L1



The new size available

Availables 2 new size

510L1 up to 4300 l/min at 1 bar (6 bar max)


520L1 up to 6670 l/min at 1 bar (6 bar max)






New wobble pump now in st. steel body casting



They are available the new pumps with stainless steel body fully casted.

For food grade use and other use.
The stainless steel casting improve
performance and enables a more hygienic.

The transmission and the stator/rotor are interchangeables with other pumps version in cast iron and bronze.






New wobble pump now Bronze available



The wobble pump now are available in bronze fo naval use>/br>Material: bronze UNI EN 1982 CC491K









Now available the new type of pump in stainless steel 304









Available pumps and spare parts for wobble Pumps type:
click here to see the sizes









New computerized data aquisition system now available to monitor production progress by bar codes.
It makes the flux of informations quicker and well-timed, so it allows a faster answer to customer's needs.









Nova Rotors has not never lost sight the target to serve the own customers with the maximum punctuality.
In the year 2005 the percentage of delays has been considerably reduced from being able to say that our punctuality it is next to 100%.










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