The CMO pumps with worm feed screw belong to the rotating positive-displacement pump category. With simple construction, the pumps are intended above all for pumping dense and/or viscous fluids.

Construction and technical characteristics

The capacity varies depending on the rotor step. The PS stainless steel series covers a capacity range from 50 to 4000 l/min, the PT stainless steel series from 50 to 1000 l/min with maximum rotation speed of 140 rpm or 200 rpm. The pressure varies with the length of the stator from 0 to 30 bar. The parts in contact with the liquid are constructed in various materials, depending on the fluid to be pumped. The rotating parts are normally in casehardening or chromium-plated steel or in stainless steel 304 or 316. The stators are constructed in natural or synthetic rubber in various mixes (Viton, Silicon, Perbunan, etc.). Specific materials can be used on request.

Field of use

The applications for this type of pump are virtually infinite due to its special construction, the materials used, the technical measures adopted and the singular working mechanism that guarantee maximum performance whether pumping must, bunches of grapes, fruit juices, meat extracts, jam, marmalade, acids, glues, oils, liquid soaps, detergents, etc.
When pumping fluids with density and/or abrasion characteristics different from those of water, it is recommended never to reach the pressure limit and capacity values expressed in the table.
For correct function of the pump, it is recommended to check that air is not being suctioned and that the supply of fluid to be pumped is constant to avoid the pump turning dry.
The values featured in the table refer to tests performed with fluids with characteristics similar to those of water.

Standard geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Twin screw geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Long pitch geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

The MN series pumps belong to the rotating positive-displacement pump category. The MN series has been perfected with the aim of achieving maximum performance in line with such compact dimensions and a highly competitive price.
The reduced weight and compact dimensions allow this pump to be used in restricted spaces and in situations that are not particularly demanding.

Construction and technical characteristics

The flow rate varies according to the rotor pitch. The MN series covers a flow rate that ranges from 3.3 to 2700 l/min. The pressure varies from 0 to 14 bar, according to the length of the stator.
The parts in contact are made from thick chrome plated steel or 304 – 316l stainless steel according to the product to be pumped. The seal is either mechanical or gland. The stators are made from natural or different mixes of synthetic rubber (viton, silicon, perbunan, etc.). Special materials are available upon request.
The support is directly connected to the gearmotor or the variable speed drive.

Field of use

Thanks to the technical devices used and the unique operation mechanism, these pumps guarantee maximum performance when pumping must, grape clusters, fruit juices, jams, marmalades, oils, acid, adhesives, cellular cement marble sludge, lime putty, etc.
When pumping fluids with viscosity and/or abrasion levels that are different from water, it is advisable never to reach the limit pressure and flow rate values given in the table.
For the pump to work well, we recommend making sure that no air is being sucked in and that the fluid to be pumped is continually available in order to prevent the pump from working dry. The values given in the table refer to tests carried out using fluids with characteristics similar to water.

Standard geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Twin screw geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Long pitch geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Construction and technical characteristics

The “PV” series pump is a special type of semi-submersible single screw pump designed to work vertically instead of horizontally as the standard models do. Expressly designed to solve problems caused by sucking products inside tanks, sewers, cisterns, drums, wells, these pumps are distinguished by an elevated positive suction head created because the pumping compartment is directly inserted inside the product to be pumped.
The particular priming method also guarantees a good result with both abrasive and corrosive highly viscous liquids.
As with standard single screw pumps, the fields of application of “PV” series pumps are many in number: Agriculture, Chemicals, Building, Water Treatment, Food and Beverages (wine, preserves, oils, jams, cheese, etc.), Cosmetics, Pharmaceutical, etc.

Field of use

The numerous fields of application of this pump required a careful search for the most appropriate constructive materials and the best applications in order to cover every single client need and obtain the number of applications and settings required to guarantee “PV” series pumps the elevated flexibility for use in situations where other models are impractical.

Standard geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Twin screw geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Long pitch geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

The C.M.O. PI series single screw pump was developed after years of working closely with the leading mixing machine manufacturers.
This machine permits the mixing of cement materials inside a special hopper with water and then to inject them directly at high pressures.
The light weight and the practicality of the trolley makes the pump particularly easy to manoeuvre even in the most restricted areas, whereas the capacious loading hopper, which is also provided with a sack breaker allows the machine to be directly installed beneath a silo.

The guillotine coupling between the joint with the feeding screw and the rotor ensures the simple disassembly and the replacement of the stator, thanks also to the lateral closing hinges that ensure rapid removal of the pumping compartment whenever necessary. Because it can be completely disassembled, the internal parts of the machine in contact with the product can be easily and thoroughly cleaned.

The standard machine can be equipped with a hydraulic motor controlled by a manual distributor that allows the inversion of oil flow for the inversion of pump rotation, or alternately with an electric gearmotor, which if mounted under inverter guarantees increased or decreased rotation speed and consequent variation in flow rate.

For better material mixing, the pump is equipped with metal mesh piping for water inlet and a flowmeter that guarantees a constant flow during the phases of mixing and injection.
The pump is also supplied with a diaphragm gauge installed at the pump outlet point that ensures a constant control of the outlet pressure during all work phases.

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Construction and technical characteristics

The heart of the machine is made up of two lobe rotors mounted on parallel axes. They rotate in a synchronised manner inversely to each other, inside a proofed chamber. The rotors have three or four lobes, according to the pump size. The combination of the rotor movements creates suction and delivery, and the special helicoidal shape of the lobes guarantees greater fluid movement without any vibrations.
The two rotors can have different coatings, according to the type of material to be pumped. The proofed chamber of the pump is of grey cast iron, and can be thick chromium plated internally if being used with particularly abrasive or aggressive fluids. The mechanical seals are made of tungsten carbide/tungsten carbide.
The important characteristics of this type of pump are:

• Compact size, just a little bigger than a rotor pump;
• Easy cleaning and maintenance. The rotors can be replaced without having to dismantle the piping;
• Double rotation: the suction connection can be positioned on the right or on the left.

Field of use

The CMO lobe pump can be used in various fields:

• Agriculture: for expurging stable effluent, diluted excrement, etc.;
• Marble saw mills: for eliminating marble sludge;
• Tanneries: for expurging water containing tanning deposits, etc.;
• Purifying plants: for treating digested primary sludge;
• Building: cement bentonite, polystyrene, lime putty, etc.;
• Drainage: for effluent or regenerating exhausted oils.

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

The CMO pumps with worm feed screw belong to the rotating positive-displacement pump category. With simple construction, the pumps are intended above all for pumping dense and/or viscous fluids.

Construction and technical characteristics

The capacity varies depending on the rotor step. The PS series covers a capacity range from 50 to 4000 l/min. The pressure varies with the length of the stator from 0 to 30 bar.
The parts in contact with the liquid are constructed in various materials, depending on the fluid to be pumped. The rotating parts are normally in casehardening or chromium-plated steel or in stainless steel 304 or 316. The stators are constructed in natural or synthetic rubber in different mixes (Viton, Silicon, Perbunan, etc.). Specific materials can be used on request.

Field of use

The applications for this type of pump are virtually infinite, due its special construction, the materials used, the technical measures adopted and the singular working mechanism guarantee maximum performance whether pumping brackish water, stall waste, unicellular cement, marble sludge, lime putty, synthetic resins, foundry sludge, etc. When pumping fluids with density and/or abrasion characteristics different to those of water, it is recommended never to reach the pressure limit and capacity values expressed in the table.
For correct function of the pump, it is recommended to check that air is not being suctioned and that the supply of fluid to be pumped is constant to avoid the pump turning dry.
The values featured in the table refer to tests performed with fluids with characteristics similar to those of water.

Standard geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Twin screw geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID

Long pitch geometry

 HIGHLY ABRASIVE LIQUID SLIGHTLY ABRASIVE LIQUID