CEM – Self-Priming Stainless Steel Pumps


Self-priming electric pumps made in SS AISI 316 with side liquid ring, widely used in the nautical, and industrial sectors to empty bilges, fire-fighting and to transfer liquids such as fresh water, sea water, diesel-oil, and chemical liquids compatible with AISI 316 stainless steel

This item is made to order and can take between 2-4 weeks before delivery



Self-priming stainless steel pumps made from AISI 316 stainless steel with side liquid ring, widely used in the nautical, and industrial sectors to empty bilges, fire-fighting and to transfer liquids such as fresh water, sea water, diesel-oil, and chemical liquids compatible with AISI 316 stainless steel

 A liquid-ring pump is a rotating positive-displacement pump The function of a liquid-ring pump is similar to a rotary vane pump, with the difference being that the vanes are an integral part of the rotor and churn a rotating ring of liquid to form the compression-chamber seal. They are an inherently low-friction design, with the rotor being the only moving part. Sliding friction is limited to the shaft seals

This type of pump is great for situations where priming can be an issue, there is however a trade of as the disruptive action of the impeller can increase noise in the system

The earliest liquid-ring pumps date from 1903, and for liquid-ring vacuum pumps and compressors in 1914

CEM - Self Priming Stainless Steel Pumps - Technical
Image showing CEM – Self-Priming Stainless Steel Pumps – Technical


Direct Current:

  • Wound field electric motor 12/24V
  • Protection IP23
  • Insulation Class F
  • Continuous Duty (S1)

Alternating Current:

  • Induction electric motor,
    • 230V single-phase (M)
    • 230÷400V
    • 400÷690V three-phase (T), 50Hz
  • Protection IP55
  • Insulation Class F
  • Continuous Duty (S1)


  • Liquid, free of solid impurities
  • Temperature range of the liquid: from +0 to +70 °C
  • Max. suction depth: 6 m. (4 m. for model 020-inox)
  • Static pressure inside the pump body: 6 bar max



Pump body: AISI 316 Stainless steel
Impeller: AISI 316 Stainless steel
Shaft: AISI 316 Stainless steel
Breech: AISI 316 Stainless steel
Reversible mechanical seal: ceramics-graphite-NBR.
Pipe fittings: Click here for Stainless steel or Nylon

DATA SHEET – CEM Stainless 316 Self Priming Pump

Additional information


12V DC, 24V DC, 230V, 230~400V, 400~690V

Max Delivery

25l/min, 29l/min, 36l/min, 43l/min, 58l/min, 120l/min, 230l/min, 500l/min, 880l/min

About CEM

About CEM Pumps and Blowers

Established in 1970 C.E.M. elettromeccanica S.r.l. has been a leading manufacturer of electric pumps and DC motors primarily focussed for use in the maritime sector
In the 48 years we have been making motors and our constant expansion in the national and the international markets have resulted in the broadening of our extensive product range

highest quality materials

This makes us the ideal partner for large and medium-sized boat builders of pleasure, fishing and military vessels.
Our extensive range now includes:

  • DC and AC electric pumps
  • Belt driven pumps, with manual or electro magnetic clutch
  • hydraulically driven pumps
  • water pressure systems
  • centrifugal and axial blowers
  • diesel driven pumps
  • manual pumps
  • DC motors

Our commitment to using the highest quality materials used, the special care invested in the design and in the innovative production processes we adopt, we are able to offer excellent performances and a remarkable lifespan of our products exactly what you need when our product can offer extra hours of safety when in difficulty
All of our products are built to standards that are in accordance with classification and certification can be obtained from each of the bodies: Bureau Veritas, Det Norske Veritas (DNV), Lloyd’s Register and RINA

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