About Sondex

About the SONDEX® brand

Global presence, local proximity

Sondex A/S was founded in 1984 as a company aiming to provide customers with plate heat exchanger solutions that are tailored to their individual needs. The company, rooted in Denmark, greatly expanded during the following years and quickly became an enterprise spanning the entire globe.

With many sales and production subsidiaries across the world, Sondex became a leading manufacturer of plate heat exchangers while remaining close to our markets with local sales and service teams.


Complete in-house production

We do all our own tooling in-house and have our own hydraulic presses and gasket production facilities. The benefit of this specialization is closed loop production – it is easier to control and monitor the quality without relying on sub-suppliers.

We can execute product development tasks faster than most, as the tooling and engineering know-how is placed internally in Sondex.


Heat transfer specialists

We design our heat exchangers in close cooperation with our customers to perfectly match the thermal requirements of any duty. Throughout the years we have developed what has become the largest plate portfolio in the world. Having an option for every application and duty enables us to fine-tune each solution to the specific task at hand.

Optimized to minimize energy consumption and reduce of service and maintenance costs, our heat exchangers have a long lifetime and low purchase price.







Together, we offer twice the application
 and customer focus

In July 2016, Danfoss acquired full ownership of Sondex. This step marks the coming together of two strong players creating an even more powerful and agile heat exchanger partner and provider.

From January 2018, Sondex will transition into a product brand and become part of Danfoss. The SONDEX® brand will continue as part of one of the most extensive product portfolios in the market.

With our world-leading product range and state-of-the-art technology, we can always offer you superior and customized solutions.

Going forward our combined sales organizations will operate side by side, and we will take pride in constantly providing you with the highest quality products and services. Your contact person will remain the same with the added advantage that you can now enjoy all the benefits of one-stop-shopping.

Feel free to get in touch with us for more information and learn how we can benefit your business.

We are very excited to welcome you to our combined world of customized, high-efficiency heat transfer solutions and we look forward to continuing our business journey together.

from https://heatexchangers.danfoss.com/about/

About Guth Valve Technology

About Guth Valve Technology

from https://www.guth-vt.de/en/company/about-us/we-are-guth/

About LIAG Laufer


LIAG-LÄUFER International AG

Hygienic Shutter Valves & Pigging Systems

Sanitary valves and pigging systems from LIAG® offer unparallel quality and product safety for the low-germ processing of high grade media.

Know How, on which you can rely!

Developed from field experience – for field use!
Many years of experience on process engineering and a consistent focus on customer demands are the basis of innovative technologies and customized system solutions.

Our primary focus is on maximum process safety and economic efficiency.

Your requirement – our solution!

Customized special solutions are our strength. We build on an extensive and close cooperation with our customers throughout the entire duration of a project: from the planning up to the delivery and, thereafter, service and maintenance.

Modular and efficient

LIAG® is certified to ISO 9001 and ISO 14001. We place strong emphasis on modular systems and production flexibility, delivering the highest quality products and service.

from http://en.q-pumps.com/nosotros

About Qpumps

About Q-Pumps

Q-Pumps has been manufacturing sanitary pumping
 for more than 40 countries.


Manufacturing sanitary pumps


Proudly Made in Mexico


As new technologies emerge, the need to streamline processes grows along with the need to generate greater productivity. This is why at Q-Pumps we seek to improve pumping systems in the production processes of multiple companies worldwide.

Our products hold certificates (FDA, 3A, EHEDG) needed to ensure our customers we are providing a high-quality product, making Q-Pumps one of the top producers of centrifugal and positive displacement pumps worldwide.



Generate trust and well-being through efficient solutions.




Keep on being a global leader company in the development, manufacture and merchandising of sanitary pumps with the highest quality, capable of satisfying the needs of our customers through technology and performance of our highly skilled staff, which makes us the world-renowned pumping experts.



• Passion
• Trust
• Creativity
• Discipline
• Respect
• Responsibility


Quality Policy


In Q-Pumps our commitment is to maintain ourselves as the best supplier for all our clients by applying continuous improvement throughout the company to meet your needs with an excellent product and service.

from http://en.q-pumps.com/nosotros

Comparison of Positive Displacement Pumping Technologies

Comparison of Positive Displacement Pumping Technologies

Twin Screw pumping technology has been around for over 100 years.  It was developed in the oil & gas industry as means for pumping multiphase products.  


Comparison of Positive Displacement Pumping Technologies


 Why Twin Screw Technology is Making all other PD Pump Technologies Obsolete!

Lobe-style and circumferential piston pumps are the primary pumping means in today’s sanitary industry.  They provide a relatively low cost means of pumping basic ingredients from point A to point B.

So what do you use if your process requires something other than simple product transfer?  Let’s say your process requires gentle product handling, low pulsation delivery, or high suction capability without the disadvantages of a progressive cavity pump?

The twin Screw, Positive Displacement Pump is changing the way companies look at their process pumps.  Here are some basic comparisons:


Twin Screw Pumps



Twin screw technology is the ONLY type positive displacement pump that has the ability to run up to 4,000 RPMs.  Unlike any other PD pump, the same pump can perform both process and CIP.  Imagine being able to eliminate additional CIP return pumps, bypass valves and all of the excess controls.  On viscous products, Twin Screw pumps can run at a relatively low speed to be gentle and provide a very high suction capability. On thin, water-like products, the Qpumps can be sped up to overcome the slip to maintain high velocities to perform CIP and CIP return pump functions.  This ability to change from very thin to very thick liquids with the same pump is a great way to reduce the number of pumps in any one plant.

StandardScrewsAs rotary lobe (RL) and circumferential piston (CP) pumps wear, the pump’s suction capability is greatly reduced, and the only way to achieve the same output is to increase speed.  But speed increase is very limited.  With the widest range of speeds, Twin Screw pumps are able to be sped up to overcome slip.  This increase in speed does not diminish its ability to pull a good vacuum.  Therefore, you get much more useful life out of a set of screws than you would out of a set of rotor.

Much like progressive cavity (PC) pumps, Twin Screw pumps have the same high suction capability, both are lower shear pumping devices, both are capable of handling large soft solids and both provide a smooth, virtually pulse free delivery of product.  Where Twin Screw sets itself apart is in its ability to run dry for hours.  In fact, Twin Screw pumps can pump up to 60% air and it will never air-lock.  And unlike rotary lobe pumps, it will run as quiet as a mouse when running dry.  The symmetrical screws do not require product to stabilize the rotor.  This means there is no overhung load to cause contact between the rotor and the housing.

Twin Screw pumps also are incredibly versatile.  By simply switching to a different screw pitch, you can change the entire flow curve on the pump.  For instance, a tighter screw pitch is capable of higher pressures but lower flowrates.  A larger screw pitch enables a pump to perform higher flowrates at lower pressures and much lower shear rates, while pumping larger soft solids.

Qpumps is the most successful Sanitary Twin Screw PD pump in North America.  It sets itself apart from other twin screw pump offerings by providing a wet end and gearcase/bearing housing that is completely machined out of 316L billet stainless steel, straight through the entire bearing housing without being removed from the five axis machine.  This ensures the most precise tolerances and the ability for the entire pump and bearing housing to expand and contract together at the most extreme of temperatures.

With high suction capability, the ability to run dry for hours, low shear pumping capability, delicate handling of soft solids up to 1-5/8” and the ability to deliver a smooth, non-pulsing, repeatable product flow, the Qpumps is capable of pumping the widest range of product viscosities (1 to 1,000,000 cps), operating at the widest range of pump speeds (up to 3,000 RPMs), and operating at the widest range of product temperatures (up to 425°F) of any other PD pump (twin screw or otherwise) on the market!  These capabilities greatly reduce the wear on the pump and cost/need of spare parts.  This is why Qpumps pumps are proving to be the Lowest Total Cost of Ownership (TCO) for PD pumps.

from https://www.axiflowtechnologies.com/technical/

Screw Pumps

Screw pump

screw pump, also known as a water screw, is a positive-displacement (PD) pump that use one or several screws to move fluids or solids along the screw(s) axis. In its simplest form (the Archimedes’ screw pump), a single screw rotates in a cylindrical cavity, thereby moving the material along the screw’s spindle. This ancient construction is still used in many low-tech applications, such as irrigation systems and in agricultural machinery for transporting grain and other solids.

Development of the screw pump has led to a variety of multiple-axis technologies where carefully crafted screws rotate in opposite directions or remains stationary within a cavity. The cavity can be profiled, thereby creating cavities where the pumped material is “trapped”.

In offshore and marine installations, a three-spindle screw pump is often used to pump high-pressure viscous fluids. Three screws drive the pumped liquid forth in a closed chamber. As the screws rotate in opposite directions, the pumped liquid moves along the screws’ spindles.

Three-spindle screw pumps are used for transport of viscous fluids with lubricating properties. They are suited for a variety of applications such as fuel-injectionoil burners, boosting, hydraulics, fuel, lubrication, circulating, feed and so on.

Compared to centrifugal pumps, positive-displacement pumps have several advantages. The pumped fluid is moving axially without turbulence which eliminates foaming that would otherwise occur in viscous fluids. They are also able to pump fluids of higher viscosity without losing flow rate. Also, changes in the pressure difference have little impact on PD pumps compared to centrifugal pumps.

The term ‘screw pump’ is often used generically. However, this generalization can be a pitfall as it fails to recognize the different product or ‘screw’ configurations, as well as the uses, advantages and design considerations for each. The design differences of each screw configuration and pump type make each suitable for different applications and handling fluids with varying characteristics.

Each ‘screw pump’ operates on the same basic principle of a screw turning to isolate a volume of fluid and convey it. However, the mechanical design of each is different. The primary difference is the number of screws: one, two, three or more.


The screw pump is the oldest positive displacement pump.[1] The first records of a water screw, or screw pump, dates back to Ancient Egypt before the 3rd century BC.[1][2] The Egyptian screw, used to lift water from the Nile, was composed of tubes wound round a cylinder; as the entire unit rotates, water is lifted within the spiral tube to the higher elevation. A later screw pump design from Egypt had a spiral groove cut on the outside of a solid wooden cylinder and then the cylinder was covered by boards or sheets of metal closely covering the surfaces between the grooves.[1]

cuneiform inscription of Assyrian king Sennacherib (704–681 BC) has been interpreted by Stephanie Dalley[3] to describe casting water screws in bronze some 350 years earlier. This is consistent with classical author Strabo, who describes the Hanging Gardens as watered by screws.[4]

The screw pump was later introduced from Egypt to Greece.[1] It was described by Archimedes,[5] on the occasion of his visit to Egypt, circa 234 BC.[6] This suggests that the apparatus was unknown to the Greeks before Hellenistic times.[5]

From Wikipedia, the free encyclopedia


How it works

Lobe Pumps

Lobe pump

lobe pump, or rotary lobe pump, is a type of positive displacement pump. It is similar to a gear pump except the lobes are designed to almost meet, rather than touch and turn each other. An early example of a lobe pump is the Roots Blower, patented in 1860.[1] to blow combustion air to melt iron in blast furnaces, but now more commonly used as an engine supercharger.

Lobe pumps are used in a variety of industries including pulp and paperchemicalfoodbeveragepharmaceutical, and biotechnology. They are popular in these diverse industries because they offer superb sanitary qualities, high efficiency, reliability, corrosion resistance and good clean-in-place and steam-in-place (CIP/SIP) characteristics.

Rotary pumps can handle solids (e.g., cherries and olives), slurries, pastes, and a variety of liquids. If wetted, they offer self-priming performance. A gentle pumping action minimizes product degradation. They also offer continuous and intermittent reversible flows and can operate dry for brief periods of time. Flow is relatively independent of changes in process pressure, too, so output is relatively constant and continuous.


Lobe pumps are similar to external gear pumps in operation in that fluid flows around the interior of the casing. Unlike external gear pumps, however, the lobes do not make contact. Lobe contact is prevented by external timing gears located in the gearbox. Pump shaft support bearings are located in the gearbox, and since the bearings are out of the pumped liquid, pressure is limited by bearing location and shaft deflection which reduces the noise levels of this pump

1. As the lobes come out of mesh, they create an expanding volume on the inlet side of the pump. Material to be pumped (liquid, or gas, possibly containing small solid particles) flows into this cavity. Rotation of the lobes past the inlet port creates enclosed volumes of material between the rotors and the pump casing.

2. The material travels around the interior of the casing in these enclosed volumes between the rotor’s lobes and the casing — it does not pass between the lobes.

3. Finally, the meshing of the lobes on the discharge side of the pump prevents the pumped material from returning to the inlet side. Continued pumping forces the pumped material out through the outlet port. If the discharge port is restricted – such as discharging a large volume of air into an engine’s intake manifold – then pressure is created in the discharge space. A lobe pump itself does not compress the material it pumps.

Lobe pumps are frequently used in food applications because they handle solids without damaging the product. Particle size pumped can be much larger in lobe pumps than in other positive displacement types. Since the lobes do not make contact, and clearances are not as close as in other Positive displacement pumps, this design handles low viscosity liquids with diminished performance. Loading characteristics are not as good as other designs, and suction ability is low. High-viscosity liquids require reduced speeds to achieve satisfactory performance. Reductions of 25% of rated speed and lower are common with high-viscosity liquids.

From Wikipedia, the free encyclopedia


How it works

Centrifugal Pumps

Centrifugal Pumps

Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor. They are a sub-class of dynamic axisymmetric work-absorbing turbomachinery.[1] The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from which it exits.

Common uses include water, sewage, agriculture, petroleum and petrochemical pumping. Centrifugal pumps are often chosen for their high flow rate capabilities, abrasive solution compatibility, mixing potential, as well as their relatively simple engineering.[2] A centrifugal fan is commonly used to implement a vacuum cleaner. The reverse function of the centrifugal pump is a water turbine converting potential energy of water pressure into mechanical rotational energy.


According to Reti, the first machine that could be characterized as a centrifugal pump was a mud lifting machine which appeared as early as 1475 in a treatise by the Italian Renaissance engineer Francesco di Giorgio Martini.[3] True centrifugal pumps were not developed until the late 17th century, when Denis Papin built one using straight vanes. The curved vane was introduced by British inventor John Appold in 1851.

From Wikipedia, the free encyclopedia


How it works

Like most pumps, a centrifugal pump converts rotational energy, often from a motor, to energy in a moving fluid. A portion of the energy goes into kinetic energy of the fluid. Fluid enters axially through eye of the casing, is caught up in the impeller blades, and is whirled tangentially and radially outward until it leaves through all circumferential parts of the impeller into the diffuser part of the casing. The fluid gains both velocity and pressure while passing through the impeller. The doughnut-shaped diffuser, or scroll, section of the casing decelerates the flow and further increases the pressure. It is important to note that the water is not pushed radially outward by centrifugal force (non-existent force), but rather by inertia, the natural tendency of an object to continue in a straight line (tangent to the radius) when traveling around circle. This can be compared to the way a spin-cycle works in a washing machine.