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The new dry compressing screw vacuum pump VARODRY

The new VARODRY is a 100% oil-free, dry compressing screw vacuum pump. Screw pumps are currently state-of-the-art in the field of industrial vacuum pumps. The VARODRY will initially be available in the sizes VD65 (65 m³/h) and VD100 (100 m³/h), the sizes VD160 and VD200 are already in preparation.To get more news about SEEPEX Pump Part, you can visit hw-screwpump.com official website.

What qualifies the pumps of the VARODRY series is their excellent suitability for the manufacturing industry. The reason: In industrial processes, pumps do not only need to handle clean air, but also dirt, particles, outgassing of media and vapors. Processes do also not always work stable, other disturbance factors might also be involved. The pump must be able to tolerate all of this. In general, screw pumps are the best choice for such demanding requirements. You can compare their function a bit to an extruder that pushes out the disturbing particles together with the regular material at its exhaust. In addition, these pumps are able to handle vapors in the best possible way. All those advantages of the screw-pump functional principle apply to the VARODRY, but next to this, due to its integrated silencer the pump offers also a quiet and pleasant sound profile.

However, there are other factors, which make a significant contribution to improving production processes. The variable inlet flange arrangement enables a flexible installation of the pump within the plant. Furthermore, the design of the silencer without “sponge-like” damper materials and the exhaust flange located at the lowest point of the pump facilitates pushing-out liquids or condensed vapors, which might incur in some industrial processes. This prevents potential formation of rust and contributes significantly to process reliability.

A further process advantage is the reliability and efficiency of the pump. It can be operated continuously at any inlet pressure and is fully resistant even against repeated shock venting. Any number of cycles can be run without overload, which is still not the current market standard.
A major differentiation of the VARODRY is its complete oil-freeness. All other screw-type vacuum pumps on the market are “dry compressing”; nevertheless, all these pumps have gear compartments partly filled with oil to lubricate the bearings and gear wheels.

Exactly this is not the case with the VARODRY pumps. The VARODRY is 100% oil-free. Because of this there is no chance for oil migration from the gear chamber into the pumps compression chamber where this oil might react with the pumped gases or in worst case even migrate backwards to the process chamber.

This hazard cannot happen with the VARODRY, as it uses grease-lubricated bearings and as even oil-lubricated synchronization gears are not used. Drive and synchronization is done with a high-tech tooth-belt, which on demand can be exchanged in a few minutes by the user himself. This also eliminates the gear oil exchanges which are still required at other screw-type pumps. It is therefore impossible that any oil can migrate backwards to the process chamber, will be blown out of the exhaust or might leak on the floor during gear-box exchange. The VARODRY is therefore the first pump on the market which is 100% oil-free which will have a significant impact on cost reduction and process room cleanliness.

Another technical advantage for industrial use is the complete air cooling of the pump. This simplifies the integration of the pump into the plant as there is no need for the sometimes complicated water supply.

In contrast to most competitor products, the VARODRY has a moderate temperature profile. The low internal temperatures which peak around 100 to 130°C (depending on operation point) also allow a handling of temperature sensitive media, often preventing that those react immediately and build-up layers inside the pump. This moderate heat is the optimum for many applications enabling long-time operation without need for compression room cleaning.

These properties qualify VARODRY for a number of applications: Optical coatings such as spectacle lenses or decorative coatings, e.g. for bathroom fittings, usually produce dust in the sputtering process. A dry compressing screw-pump simply blows such dust through while in oil-sealed pumps the dust is trapped which causes strong wear of the motive parts.

The VARODRY is also a perfect pump for drying processes and industrial cleaning systems, e.g. for casted machine parts. Such parts must be dried thoroughly after cleaning to avoid immediate flash rust corrosion. The best method to dry such massive parts which have sometimes hidden solvent reservoirs inside bore-holes or cavities is vacuum drying. The moisture is extracted from even the smallest holes and the part is completely dried. This application requires pumps that can tolerate a lot of vapors – such as the VARODRY vacuum pumps.

How Screw Pumps Can Improve Chemical Processing Applications

In the universe of industrial manufacturing, the general definition of the term unit operation is rather benign: a basic step in a process. In the world of chemical processing, however, unit operations are much more than that. Namely, they are the blueprint for the series of production stages that must be precisely completed for the manufacturer to turn a collection of raw materials into a viable end product.To get more news about screw pump rotor, you can visit hw-screwpump.com official website.

There are five classes of unit operations in chemical processing. This article will focus on fluid-flow processes, which most commonly consist of transfer, filtration, solids fluidization and transportation activities. For reference, the other four unit operations are heat transfer (evaporation and heat exchange), mass transfer (distillation, extraction, adsorption and drying), thermodynamic (refrigeration and gas liquefaction) and mechanical (crushing, pulverization, screening and sieving).

Over the years, centrifugal pumps have built a reputation as the default pumping technology for fluid transfer applications in chemical processing. In all fairness, centrifugal pumps do possess the basic capability to meet the operator’s needs in these situations since their method of operation makes them well designed for the high-volume transfer applications that are common in the industry. Centrifugal pumps also work well with thin, water-like fluids that must be transported through networks of piping with variable flow rates.
This article, however, will illustrate how different types of pumping technology—positive displacement twin- and triple-screw pumps—can be a more reliable, efficient and economical choice than centrifugal pumps in critical fluid handling operations in the chemical processing industry, many of which involve the handling of highly abrasive, corrosive and hazardous materials.

The Challenge
The biggest challenge in making the screw pump more prevalent in chemical processing applications is moving the industry’s operators away from the ingrained perception that centrifugal pumps are the one and only choice for their fluid transfer requirements.

In many cases, chemical processing systems have been designed around the pumping technology, rather than the other way around.

This means that engineers are first familiar with centrifugal pumps and attempt to work within their operational limits. They know how centrifugal pumps operate, know their benefits and are confident that they are the best technology for what they are trying to accomplish.

Based on this mindset, design engineers will design systems that can blend or heat raw chemical materials or compounds as a way to manipulate the process and bring the viscosity of the fluid down to less than 300 centistokes (cSt), which makes the fluid more manageable for the centrifugal pump to handle. In this case, what they are doing is reconditioning the fluid to fit the pumping technology—irrespective of the cost impact.

Despite the ability to recondition the fluid to meet the operational needs of the centrifugal pump, operators must still ensure that the centrifugal pump is operating on or near its best efficiency point (BEP). Centrifugal pumps rarely operate at their exact BEP because pristine pumping conditions are seldom experienced. With this in mind, a centrifugal pump is assumed to be operating at its highest level of efficiency in a window between 80 percent and 110 percent of its BEP.

However, when the operation of the pump moves too far to either side of the BEP, uneven pressure will be applied to the impeller, which can lead to increased radial thrust that will cause the pump’s shaft to deflect. When deflection occurs, higher loads will be placed on the bearings and mechanical seal, which will damage the pump’s casing, back plate and impeller.

Hygienic twin screw pump Type WANGEN Twin NG

The new generation of the WANGEN Twin NG screw pump is part of the hygienic pumping solutions from WANGEN and was designed to reliably pump low to highly viscous, volatile or gaseous products and for applications where maximum hygiene and efficiency is required.The hygienic pump for food and beverages, chemicals and cosmetics.To get more news about screw pump, you can visit hw-screwpump.com official website.
Available as 3A authorized version (WANGEN Twin NG 70, 104, 130) or EHEDG certified version (WANGEN Twin NG 70, 104, 130, 180).

Spindle replacement without the need to re-synchronise the spindle shafts, thanks to fast-X-change® technology, developed by WANGEN PUMPEN.
Cartridge design for simple and quick seal replacement.
Coupling alignment by self-centring flange housing (lantern optionally available). Therefore no need for re-alignment of the coupling, for instance after service work
high suction lift (self-priming)
high operational reliability
compact design avoids dead space and stagnantion zones
consistent modular principle for high flexibility, low stocking of spare parts, short downtimes for maintenance and repairs
almost pulsation-free conveyance
optionally with heating or cooling jackets
optionally with base plate or mobile
gentle pumping
special versions available for adapting to existing plants

Leading Food & Beverage Applications of Screw Pumps

Screw pumps are used in a wide range of applications and industries, most commonly in oil, manufacturing, mining, and gas, but they can also serve an invaluable function in the food and beverage industry.To get more news about screw pump stator, you can visit hw-screwpump.com official website.

Their ability to safely transfer a variety of food materials and ingredients while effectively operating under extreme temperatures, flow pressures, and viscosities make them an indispensable part of many food and beverage manufacturing operations.
What Are Screw Pumps?
Screw pumps are a type of positive displacement pump utilizing screw-shaped rotors that intermesh and rotate together to capture and transfer a range of materials, including fluids, gas-liquid mixtures, and solid-liquid mixtures.

There are different variations of screw pumps designed to handle specific substances or applications, including:

Single Screw Pumps - The most common, single screw pumps are better known and often referred to as progressing cavity pumps. Their stator (screw) lightly contacts an elastomer stator, creating fixed cavities to convey a variety of difficult-to-pump media.
Twin Screw Pumps - Drive and driven shafts and screws of this type are usually synchronized with timing gears. A variety of screw geometries are available for handling different materials.
Triple Screw Pumps - These feature a drive screw and two driven screws, usually without timing gears. They are commonly used for lower-flow, higher-pressure applications such as lube oil systems.
Four Screw Pumps - These models encompass two opposed, twin screw pumps using a drive shafts and timing gears to turn its screws synchronously together, without contacting.
Five Screw Pumps - Featuring a drive screw and four driven screws, with timing gears, these are commonly used for high-viscosity fluids at higher flow rates and different pressures.
Screw pumps are especially effective at transferring high viscosity fluids and solid mixtures, as well as provide pulsation-free, low-shear handling of a wide variety of materials—making them useful for an assortment of food and beverage processing operations.
Single and twin screw pumps are the most commonly used screw pumps for food and beverage processing, as their designs are uniquely suited for sanitary applications.

Single Screw Pumps
Also known as progressing cavity pumps, single screw pumps, such as the Seepex model N and SCT series, are ideal for handling wastewater sludge and other hard-to-pump materials.

Food-grade sanitary versions such as the Seepex model CS are effective for conveying food products with low shear and minimal damage to solid food or ingredients, including fruits and vegetables. Seepex provides specialty versions with rectangular hopper or augur feed, as well.

Twin Screw Pumps
Twin screw pumps are characterized by their consistent flow and pulsation-free, low-shear pumping action. They also have the ability to effectively handle thin or thick fluids containing solids and are used to transfer a diverse array of products with very low rates of product or ingredient damage.

Q-Pumps’ model QTS twin screw pump is great at handling fluids with varying viscosities, ranging from 1 cP to 1,000,000 cP, and can easily and safely transfer ingredients including meat, dough, fruit purees, yogurts, glycerine, creams, and ointments, as well as fluids with a high degree of entrained air.

Q-Pumps’ model QTS is 3A and EHEDG (European Hygienic Engineering and Design Group) certified for sanitary pumping in the food and beverage industry. Its design is fully cleanable-in-place (CIP), too, since it has no contacting parts in the wet end, and can therefore be sped up to full motor speed between batches to act as its own CIP pump.

The QTS series of pumps can handle flows up to 570 gpm (2158 lpm), pressures up to 360 psig (25 bar) and temperatures up to 300 degree Fahrenheit (120 degrees Celsius). A variety of rotor geometries are available to optimize pump performance based on viscosity, solids concentration and solid size, and other fluid characteristics. Twin screw pumps can also be used in automated food manufacturing applications to unload various ingredients from drums and storage systems.

Finding the right pumps and systems for your facilities is critical to your overall success. Working with industrial pump provider Sunair can help ensure your facilities and operations are outfitted with the highest-quality equipment for optimal performance.