[vc_row full_width=”stretch_row” content_placement=”middle”][vc_column][et_tabs][et_tab title=”WILDEN” tab_id=”1476864088332-b381c4bd-0272″ img=”4666″][vc_column_text css_animation=”top-to-bottom”]Wilden

The Wilden Company, as a part of the Pump Solution Group (PSG), Corporation, has been one of the leaders of the industrial pumps market since 1955.

The products of the Company, diaphragm pumps with a pneumatic drive, are known around the world.

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The Wilden products are widely used in various industries: from construction to mining industry, from food enterprises to chemical and petrochemical plants.

MAIN ADVANTAGES OF WILDEN PUMPS:

  • Pneumatic pumps (non-electric ones)
  • Self-suction
  • Possibility of running dry
  • Freezing-prevention technology
  • Work with the overlapped pump discharge line without damage
  • Changing the pressure and flow rate through the adjustment of supply air parameters
  • Explosion protection
  • Operation without oil
  • Reliable switching on and off
  • Ability to pass big solids
  • Easy operation and maintenance

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LEWA is a leading global manufacturer of diaphragm dosing pumps, process pumps, complex accounting systems. The company was founded in 1952 and currently has 14 subsidiaries and more than 100 sales partners on all continents. In total, more than 1000 people are working in the LEWA Company. 560 of these employees are working in our headquarters in Leonberg, Germany.

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LEWA diaphragm and piston pumps provide the highest possible accuracy of dosing. They set the standards of safety, reliability and efficiency, especially when it comes to pumping of supercritical fluids.

Each LEWA dosing pump has been developed with the special advantages. They include energy efficiency, low maintenance costs and an extremely long diaphragm life. Moreover, depending on the model, LEWA pumps can handle liquids and supercritical liquefied gas. The equipment also meets the highest requirements of the oil and gas, chemical, cosmetic, pharmaceutical and biotechnology fields, or food and beverages production.

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Centrifugal pump is a pump in which the fluid movement and required pressure are created due to the centrifugal force generated by the influence of the runner blades on the fluid.

Principle of Work

Inside the pump housing, which has, as a rule, a spiral shape, a runner is rigidly fixed to the shaft. It may be of an open (a disk on which the blades are installed) and closed type – the blades are positioned between the front and rear disks. The blades are bent from the radial direction in the direction opposite to the direction of rotation of the runner. With the help of nozzles the pump body is connected to the suction and pressure lines.

If the pump body is completely filled with liquid from the suction line, imparting rotation to the runner (for example, with the help of an electric motor), the liquid which is located in the runner channels (between its blades), under the influence of the centrifugal force will be thrown from the runner centre to the periphery. This will cause the pressure to rise in the central part of the runner, while pressure will rise in the periphery. And if the pressure rises, the liquid from the pump will start to flow into the pressure line. Consequently, the vacuum is formed inside the pump body under the influence of which the liquid begins to flow simultaneously into the pump from the suction line. Thus, there is a continuous supply of liquid by the centrifugal pump from the suction to the pressure pipeline.

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Centrifugal pumps are not only of a single-stage type (with a single runner), but also of a multi-stage one (with multiple runners). The principle of their work in all cases remains the same. The liquid will move by the centrifugal force which develops due to the rotating runner.

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320px-Gear_pump_animationGear pump with an external gearing works according to the following principle. The driving gear is in constant gearing with the driven gear and brings it into a rotational movement. During the rotation of the pump gears in opposite directions the teeth in the increasing space, coming out of the gearing, form a negative pressure (vacuum). Due to this, the fluid flows from the hydraulic reservoir to the working fluid flows, which, filling the cavities between the teeth of the two gears, moves between the teeth along the cylindrical walls of the wells in the body and is transferred from the increasing space to the decreasing space where the teeth of gears enter the gearing and eject the fluid from the cavities into a pressure line

External gear pump design for hydraulic power applications.Internal gear (Gerotor) pump design for automotive oil pumpsInternal gear (Gerotor) pump design for high viscosity fluids

In this case the tooth formed close contact, whereby the reverse transfer of fluid from the decreasing space to the increasing space is insignificant. Lubrication of the moving elements of the pump is made with liquid (oil, polymer melt, etc.), for entry of lubricating fluid to the friction zones of the pump construction the special channels are provided in the body parts of the pump.

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Screw pump is a pump in which the pressure of pressured fluid is created due to fluid displacement by one or more metal screw rotors rotating inside the stator of a corresponding shape.

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Screw pumps are a kind of rotary gear-teeth pumps and are easily obtained from the gear pumps by reducing the number of teeth of gears and increasing the angle of inclination of the teeth.

Principle of Work

Pumping of liquid takes place due to its transfer along the axis of the screw in the chamber formed by the helical flutes and the surface of the body. When screw ridges enter into the flutes of the adjacent screw, they create a closed space not allowing fluid to move backwards.

It is intended for pumping liquids of varying viscosity, gas or vapor, including the mixtures thereof.

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[/vc_column_text][/et_tab][et_tab title=”Rotary (Cam-driven) pumps” tab_id=”1476879731284-1f41bbfd-3aa8″ img=”4672″][vc_column_text css_animation=”top-to-bottom”]Cam pumps are characterized by high efficiency, easy maintenance and low noise, have a hygienic design and provide careful pumping of a product. They may be used for pumping the fluids:

  • With a sensitive structure
  • With a maximum viscosity of up to 100000 cP
  • With a maximum operating temperature up to 150 °C
  • Since a maximum allowable particle size of up to 28 mm

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Pumps of a cam type are particularly needed in cases where the violation of their structures is not permitted during the transportation of products. This is especially urgent when pumping processes require pumping of adhesives, berries and other products that require a smooth and continuous transportation flow. Traditional advantages of such equipment include:

  • A high degree of hygiene of cam systems which allows using them when working with food.
  • Reliable, easy to maintain and durable design of the pump body to withstand heavy loads during operation.
  • Ability to provide a uniform flow, extremely careful transportation of liquids and other products.

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