Pompes pneumatiques A membranes

AIR OPERATED DOUBLE DIAPHRAGM PUMPS

Double diaphragm pneumatic pumps, ideal for pumping and dosing solvents, paints, inks, fuels, food and pharmaceutical fluids, viscous liquids, abrasive chemicals, explosive or flammable liquids. Their extremely compact dimensions make them perfect for small industrial spaces. Driven by compressed air. Materials: corrosion-resistant plastic (PP, PVDF, ECTFE) and metal (steel and aluminium).
Plastic air-operated double diaphragm pumps

BX SERIES: PLASTIC PUMPS

Double diaphragm pumps made of thermoplastic (PP, PVDF, ECTFE). Suitable for the movement of corrosive chemicals, viscous fluids and dense liquids. Maximum flow rate: 800 l/min. Maximum head: 8 bar.

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Metallic double diaphragm pumps operated by air

BX SERIES: METAL PUMPS

Double diaphragm pumps made of metal (steel, aluminium). Compatible fluids: non-aggressive industrial liquids, flammable liquids, dense fluids and viscous products (oils). Maximum flow rate: 800 l/min. Maximum head: 8 bar.

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Plastic air-operated double diaphragm pumps

BX SERIES: PLASTIC PUMPS

Double diaphragm pumps made of thermoplastic (PP, PVDF, ECTFE). Suitable for the movement of corrosive chemicals, viscous fluids and dense liquids. Maximum flow rate: 800 l/min. Maximum head: 8 bar.

LEARN MORE

Metallic double diaphragm pumps operated by air

BX SERIES: METAL PUMPS

Double diaphragm pumps made of metal (steel, aluminium). Compatible fluids: non-aggressive industrial liquids, flammable liquids, dense fluids and viscous products (oils). Maximum flow rate: 800 l/min. Maximum head: 8 bar.

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Membranes of anti-acid double diaphragm pumps

INTERNAL DIAPHRAGMS

There are two pairs of diaphragms inside the BX pneumatic pumps and these are obviously the elements subject to the greatest stress during suction and pumping (both at chemical and mechanical level). The membranes are designed to redistribute the load, minimising the yielding of the material. The possible anti-acid and wear-resistant configurations are: plastic (Hytrel, Santoprene), rubber (NBR, EPDM) or PTFE.

THERMOPLASTIC MATERIALS

AODD pumps in polypropylene for weak acids and corrosive solutions

PP (POLYPROPYLENE)

The most widely used thermoplastic polymer for the construction of anti-acid centrifugal pumps. It offers good resistance to most acid and alkaline solutions and can be used, depending on the concentration of the aggressive liquids, at temperatures of up to 80°C.

AODD pumps in PVDF for strong acids, high temperature chemicals and difficult liquids

PVC (POLYVINYL CHLORIDE)

Plastic material with an excellent resistance to acids, bases, saline solutions and organic compounds. PVC is generally used for pumping sodium hypochlorite (NaClO). At low temperatures it becomes fragile. The operating temperature is between 40 and 60°C.
AODD pumps in metal for solvents, oils, fuels, flammable fluids, food and pharma applications

METAL (AISI316L AND ALUMINIUM)

BX diaphragm pumps can also be made from metals such as aluminium and stainless steel (AISI 316L). In these configurations, they can pump solvents, oils, fuels, difficult liquids from the food, pharmaceutical and ceramic industries, or hot liquids.

HOW THEY WORK

Air operated double diaphragm pumps (AODD pumps) consist of a coaxial pneumatic motor, two pairs of diaphragms and two pumping chambers. The latter are connected to two manifolds (one suction and one delivery). The suction and delivery phases are regulated by ball valves, retained by appropriate seats. Double diaphragm pumps work by alternating a volume of liquid (volumetric pumps). Operation is by means of diaphragms which work simultaneously in opposite directions: their displacement simultaneously creates a vacuum (suction) and pressure (pumping). Compressed air, introduced behind one of the two pairs of diaphragms, compresses the liquid in the delivery line: the opposite diaphragms, which are attached to the motor shaft and driven by it, simultaneously suck in the same liquid. Once the stroke is complete, the coaxial motor diverts the compressed air and the cycle is reversed. As you can imagine, the pairs of diaphragms always work alternately in both directions, generating their typical pulsating flow.

SOME CORROSIVE LIQUIDS

AODD pump for chemical processes and industrial applications
  • Nitric acid
  • Muriatic acid
  • Citric acid
  • Brine, Ammonia
  • Caustic potash
  • Chemical fertilisers
  • Fertilisers
  • Glycerine, glycol
  • Fuels and biodiesel
  • Various solvents
  • Seawater
  • Sulphuric acid
  • Caustic soda
  • Hydrochloric acid
  • Sodium hydroxide
  • Chromic acid
  • Sodium hypochlorite
  • Hydrofluoric acid
  • Ferric chloride
  • Aluminium polychloride
  • Phosphoric acid
  • Acetic Acid
  • Flocculants
  • Polyelectrolytes
  • Urea and AdBlue
  • Sanitising gels
  • Inks, dyes, paints
  • Vegetable oils
  • Industrial oils
  • Cosmetic liquids
  • Industrial detergents
  • Distilled water
  • Demineralised water
  • Hydrogen Peroxide
  • And your liquid of course!
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  • Nitric acid
  • Muriatic acid
  • Citric acid
  • Brine, Ammonia
  • Caustic potash
  • Chemical fertilisers
  • Fertilisers
  • Glycerine, glycol
  • Fuels and biodiesel
  • Various solvents
  • Seawater
  • Sulphuric acid
  • Caustic soda
  • Hydrochloric acid
  • Sodium hydroxide
  • Chromic acid
  • Sodium hypochlorite
  • Hydrofluoric acid
  • Ferric chloride
  • Aluminium polychloride
  • Phosphoric acid
  • Acetic Acid
  • Flocculants
  • Polyelectrolytes
  • Urea and AdBlue
  • Sanitising gels
  • Inks, dyes, paints
  • Vegetable oils
  • Industrial oils
  • Cosmetic liquids
  • Industrial detergents
  • Distilled water
  • Demineralised water
  • Hydrogen Peroxide
  • And your liquid of course!
LEARN MORE
Air-operated double diaphragm pump with polypropylene body for aggressive liquids
OTHER FEATURES

 

  • Compact design, ideal for reduced industrial spaces.
  • Suitable for dry running.
  • Volumetric pumps characterised by pulsating flow rate.
  • Suitable for use in explosive environments (Atex Certification).

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