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The increasing use of multi screw pumps in modern industry
The adoption of multi screw pumps has increased exponentially over the past half-decade, with the consumption volume rising from 146,000 units in 2015 to 202,000 units in 2022. To get more news about Screw Pump, you can visit hw-screwpump.com official website.
This rapid rise has been fueled by several factors, including major growth in the industries of end users, such as power generation, food and beverage, and chemical and petrochemicals. Other reasons include the modernization of the water and wastewater industries, the use of these pumps in hydraulic fracturing, and the sustained rise of urbanization and industrialization in the developing world.
In addition to increasing demand, there is also a growing awareness and understanding of the advantages of multi screw pump technology. Indeed, these technologies have benefited from significant improvements, including new designs and the ability to machine within tighter tolerances. Specialized products have also become available with varying levels of performance for a range of specific applications.
The advantages of multi screw pumps
Multi screw pumps provide a range of advantages across their various applications. First, these pumps are distinguished by their energy and operating efficiency, leading to significant reductions in energy cost and cost of maintenance. NETZSCH NOTOS multi screw pumps, for example, lead to 23.3% more efficiency when compared to other pumps on the market.
These pumps can also handle a range of media, including incompressible and highly-viscous products. This includes product that is abrasive, aggressive, corrosive, shear-sensitive, solids laden, low or high viscosity, and lubricating or non-lubricating.
High pressure and leak free, the performance of multi screw pumps is consistently high level. They handle the conveyed product gently and smoothly, also reducing the noise of the process. Because they are entirely made of metal, multi screw pumps can also tolerate temperatures, above 572° Fahrenheit or 300° Celsius.
Multi screw pumps are also hygienic by design, making them ideal for applications in near-sterile environments, such as in the food, beverage, pharmaceutical, and cosmetics industries. These pumps are easy to clean because they are made of stainless steel and are rigorously polished, such that a pumped product cannot stick to the surfaces. This design allows for effective cleaning-in-place (CIP) and sterilization-in-place (SIP) processes.
How multi screw pumps work
The working principle of multi screw pumps is inherent in how their interlocking screws move the product. These pumps function via a drive spindle that transmits torque to multiple rotating, intermeshing spindles. As these screws rotate, the chambers move continuously from the suction side to the pressure side, effectively conveying the product. This operating principle is what drives the smooth and gentle pumping and high performance of screw pumps.
Twin-Screw Pumps
Bornemann Twin-Screw Pumps are self-priming, double ended positive displacement pumps with external timing gears and bearings. Manufactured in over 80 sizes, their design provides complete axial balancing of the rotating elements and eliminates all metal-to-metal contact within the pump.To get more news about MONO pump Accessories, you can visit hw-screwpump.com official website.
They can handle virtually any non-homogeneous fluid, regardless of viscosity, lubricity or abrasiveness e. g. seawater, bitumen, molasses, lime, acid, caustic solution or hydrocarbon.
Principle
While pumping there is no metal-to-metal contact within the pump housing. This allows good pumping performance even with non-lubricating and corrosive and contaminated fluids.
As the pump rotates, the intermeshing of the two screws along with the pump housing form chambers. These chambers fill with the pumped fluid and move it from the suction side of the pump to the higher pressure discharge side of the pump.
The pump is designed to allow for reverse flow by simply changing the shaft direction. The suction becomes the dis-charge and vice versa, all without any modifications to the pump
When shouldn’t you use a Twin Screw Pump?
So why not use a twin screw? About 10 years ago when twin screw pumps burst onto the sanitary pump scene, there were a few folks who only sold twin screws and did a really good job of making every application a twin screw application. Pumping Greek Yogurt? Twin screw. Mayonnaise? Twin Screw. Beer? Twin Screw. A product you’ve been handling for 20 years with an ECP pump without issue? Twin screw. You get the idea- every application between a twin screw pump application.
The reality is, twin screw pump technology, while robust and versatile, isn’t for every application. They cannot be piped inline and twin screw pumps have a large footprint. When used in high turndown applications, twin screw pumps require exceptionally large motors.
Twin screw pumps are also much more complex to service and there is less familiarity with twin screw technology among maintenance personnel than with other, more established technologies. Screws must be properly matched and timed, often requiring special training of maintenance teams. Accordingly, we don’t recommend twin screw for clean out of place applications.
Cost is also a key consideration, with twin screws costing up to 50% more than comparably sized ECP type pumps. This carries through to parts, which has a great impact on total cost of ownership. As we mentioned above, one of the reasons we love twin screw technology is it allows us to do two duties- process and CIP- with one pump. Not only does it make piping easier, it also helps make the economics work.
Everything You Need To Know About Screw Pumps
Some of the most versatile, solidly built and reliable pumps in the marketplace today are screw pumps. Is a screw pump right for you and your application? This article explores how screw pumps work, types of screw pumps, applications that utilize screw pumps and the advantages and disadvantages of screw pumps.To get more news about Screw Pump, you can visit hw-screwpump.com official website.
What is a Screw Pump?
Self Priming Pump
A screw pump is a type of positive displacement pump typically using two or more screws that intermesh to pressurize fluids and move them through the system. The movement of the liquid is created with the screws rotating on an axis creating positive displacement suction to help push the fluids from the inlet to the outlet where it can be discharged. The fluid pressure increases as it moves through the system before being ultimately expelled. Screw pumps are capable of handling viscous and cleaner, thinner fluids.
What are Some Applications that Utilize Screw Pumps?
Since screw pumps deliver the highest flow rate among positive displacement pumps they are perfect for moving viscous and demanding fluids, such as asphalt, oil, gas, and multi-phase liquids (liquid and vapor mixed together in a system). They are also popular in the manufacturing, food and beverage, wastewater, and mining industries. Single screw pumps (progressive cavity pumps) are designed for storm water pumping, sewage inlet pumps, drainage pumping and wastewater.
What are Types of Screw Pumps?
Single Screw Pumps – The single screw pump, widely known as a progressive cavity pump, is technically not in the category of screw pumps. They feature a rotor and stator that differ from the screw component found in screw pumps. The shaft in a progressive cavity pump is somewhat twisted resembling a screw.
Twin Screw Pumps – The twin screw pump, also referred as a double screw pump, functions by using two intermeshing screws. Due to a simple, but effective design, the screws don’t have to make contact with each other, which aids in extending the lifespan of the pump. They are ideal for transfer applications because of their high head and high flow attributes.
Triple Screw Pumps – Triple screw pumps are often used for smaller pumping systems, such as lubrication operations. They typically designate one driving screw interconnected with other screws to generate pressure and move fluid. A disadvantage of the triple screw pump is that the screws don’t come into contact with each other, which usually limits the pump to handling only clean liquids.
Four Screw Pumps – Four Screw pumps are basically combining two twin screw pumps together, but with two screws for each rotor in opposite directions. It works with the pumps absorbing liquid through the suction port and dividing the liquid evenly. The divided liquid is then routed to both pump ends. The two liquids flow with the help of the pump towards the center and reunite before being expelled from the discharge side. Four screw pumps are often utilized for oil transport pipelines and multi-phase applications.
WHY TWIN SCREW PUMPS ARE A TOP CHOICE FOR SANITARY PROCESSORS
Precise tolerances and the ability to pump a wide range of viscosities and temperatures, partnered with an extremely low cost of ownership make twin screw pumps a top choice for sanitary processors in food, beverage, personal care and other high purity industries.To get more news about MONO pump Accessories, you can visit hw-screwpump.com official website.
Twin Screw pumping technology has existed for a century, but was originally developed in the oil & gas industry. At the end of the 20th century Jung Process Systems helped to develop the first sanitary, twin screw positive displacement pump that was both EHEDG and 3A compliant. The versatility, flexibility and optimal performance have positioned twin screw pump technology as an industry leader for processors with tough pumping applications.
ONE PUMP = TWO DUTIES
Twin screw pump technology is the ONLY type positive displacement pump that has the ability to run up to 4,000 RPMs. This means, that unlike any other PD pump, a single twin screw pump can perform both process and CIP. This gives processors the ability to eliminate additional CIP return pumps, bypass valves and all of the excess controls.
WIDE RANGE OF VISCOSITIES
For 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 Axiflow pump 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.
EXTREME SPEED RANGE = LONG PRODUCT LIFE
As 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. However, speed can only be increased so much. But 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 rotors.
ABILITY TO RUN DRY
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. Twin screw pumps can pump up to 60% air and it will never air-lock. The symmetrical screws do not require product to stabilize the rotor, meaning there is no overhung load to cause contact between the rotor and the housing.
EXTREME VERSATILITY
Twin screw pumps are also 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.
TIGHT TOLERANCES FOR EXTREME TEMPERATURES
Axiflow 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.