HTM SP mag drive centrifugal pump self-priming

We are extending our product line: our new pump is ready!

We are happy to announce our new mag drive centrifugal pump self-priming HTM SP!

GemmeCotti HTM SP pumps combine the typical features of our mag drive centrifugal pumps with the self-priming capability. These pumps can prime up to 6 meters at sea level.



HTM SP pumps are made of Polypropylene (PP), a thermoplastic material that ensures the best resistance to most chemicals.

All the internal plastic parts are obtained through the injection moulding process that we directly manage in our sister company Gemme Plast.


The new magnetic centrifugal pump self-priming HTM SP can reach a capacity of 25 m3/h and a head of 22 m.

The suction connection of this pump can be customized in 3 welded configurations according to your needs (frontal, on the right and on the left).

HTM SP curves


Mag drive pumps have a special sealless design that is suitable for pumping corrosive and dangerous liquids thanks to the high chemical resistance and to the absence of leakage and emissions. The structure is really simple and it requires very little maintenance with consequent savings in terms of repairing, spare parts and machine downtime costs during the pump life.

In magnetic pumps, there is an external magnet which is connected to the shaft of the electric motor.
The synchronous motion is transmitted from the motor to the rotor (consisting of the internal magnet and the impeller) through the external magnet. The two magnets never come into contact, they are moved by the magnetic field only. The impeller connected to the internal magnet spins around a static shaft and the liquid moves through the pump. The whole hydraulic part is hermetically sealed: in the space between the magnets there is a rear casing which closes on the pump head and prevents the pumped liquid from coming out of the pump.

The pumped liquid must be clean, without solids in suspension (max. quantity of solids: max 2% – max 1mm).

Read more about the magnetic system


• Materials available: PP or PVDF*;
• Materials in contact with the liquid: Pump housing: PP; Impeller: PP or PVDF;
O-ring: EPDM (standard for PP pumps) / VITON
(standard for PVDF pumps); Static shaft: Al2O3 99.7%; Bearing: PTFEC.
• Capacity up to 25 m3/h.
• Head up to 22 m.
• Max temperature: PP: 70° C – PVDF: 90° C.
• Max viscosity: 200 cSt.HTM SP connections
• Pressure rating: PN6 at 20° C.
• Self-priming up to 6m at sea level.
• Suction connection available in 3 welded configurations
(frontal, on the right and on the left).
*Pump housing only available in PP.

• Gas threaded In and Out connections.
• Direct starting motor.

• Baseplate.


   HTM SP is now available!

                       Contact our office at for any further information.        

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HTM 100 PP/PVDF: our biggest mag-drive centrifugal pump is now available

 mag-drive centrifugal pump HTM 100

Just two months ago we had the pleasure to introduce to you our new magnetic drive centrifugal pumps HTM 80 as one of the biggest pumps with injection moulded parts in the market. But now we are getting even bigger! GemmeCotti’s mag-drive centrifugal pumps series HTM has indeed another new entry: the HTM 100 PP/PVDF. Just as her little sister HTM 80, mag-drive pump HTM 100 PP/PVDF is not machined from a block and it can reach a capacity of 130 m3/h and a head of about 50 mlc.


Performance capability:

HTM 100 is the new king size of our best seller series HTM. This centrifugal pump series, that now counts 9 sizes of pumps, can cover a range of flow from 0,5m3/h to 130m3/h and a range of head from 0,5mlc to 48mlc.


As all our HTM pumps, HTM 100 is available in thermoplastic materials (PP or PVDF). These materials grant the best resistance to a lot of existing chemicals. You can find a useful compatibility guide here to find out which material better fits your liquid. Moreover, in HTM 100 all the internal plastic parts are obtained through the injection moulding process that we directly manage in our sister company Gemme Plast

Mag drive design of HTM 100:

The special design of our mag-drive centrifugal pumps without any mechanical seal has a lot of advantages, such as the prevention of any leakage of fluid and fugitive emissions, the very low maintenance and the easiest possible assembly process.

Magnetic drive pump functioning:

How does the HTM 100 work? Thanks to our magnetic drive technology it is very simple to explain. An external magnet located on the drive shaft transmits the motion to the internal magnet, that is connected to the impeller. The impeller rotates and moves the fluid through the pump. Isn’t it really easy? Furthermore, the two magnets are separated by the rear casing that creates a hermetic container for the liquid, avoiding any access from the outside.


Materials: PP; PVDF 

Maximum flow: 130m3/h

Maximum head: 48mlc

Max temperature: PP 60°C, PVDF 90°C

Max viscosity: 200cSt

Nominal pressure: 6 bar @20°C

HTM series king-size HTM 100 PP/PVDF is now available! Contact our office at for any further information.

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Magnetic drive pumps experts

GemmeCotti manufactures high quality Magnetic Drive Pumps suitable to handle chemicals and corrosive liquids. Our pumps are usually made in PP, PVDF or AISI316 but for special projects we can also offer pumps made in Hastelloy or Titanium.
They can be used in many different applications: chemical plants, waste water treatment, air treatment, galvanic industry, printed circuit boards production, biotechnology, heat exchangers, photography, textile industries, food industries, aquariums and many more.

We offer different kind of magnetic drive pumps which cover a wide range of performances and pumping solutions: mag drive sealless centrifugal pumps, mag drive turbine pumps, mag drive vane pumps

Among the magnetic drive sealless centrifugal pumps there are:

Sealless mag drive pumps - GemmeCotti


HTM PP/PVDF – mag drive pumps in platic

Capacity up to 50 m3/h
Head up to 35 mlc
Temperatures: PP 0°/ 70°C PVDF 0 / 100°C
Materials available: PP or PVDF

Click here to read more about HTM PP/PVDF


mag drive centrifugal pump HCM
HCM PP/PVDF – mag drive pumps machined from a block

Capacity up to 130 m3/h
Head up to 48 mlc
Temperatures: PP 0°/ 70°C PVDF 0 / 100°C
Materials available: PP or PVDF
Pump head machined from a block

Click here to read more about HCM PP/PVDF



magnetic drive pump in AISI316

 HTM SS 316 – mag drive centrifugal pump in AISI316

Capacity up to 32 m3/h
Head up to 24 mlc
Temperatures: from -40°C to 200°C
Material available: AISI 316

Click here to read more about HTM SS 316


Main advantages of sealless mag drive pumps:

  1. Sealless design without mechanical seals
  2. Hydraulic part hermetically closed
  3. No leakage or emissions
  4. No maintenance costs
  5. Long life-time
  6. No need of motor/pump alignment
  7. Safe and reliable pumps

Contact our sales department for further information


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