What is a Screw Pump : Different Types, Advantages and Applications

 

screw pumps applications

Applications for Screw Pumps. There are many uses for screw pumps in a variety of different industries, including Manufacturing, Mining, and Oil & Gas. Most of these applications deal with high viscosity fluid, such as oil or asphalt, or multi-phase fluid, which means there is liquid and vapor mixed together in the fluid stream. Below are some. In today's upstream and midstream oil and gas environment, screw pumps are playing a larger role in what has traditionally been a centrifugal and reciprocating pump market. This is due in large part to technological innovation by screw pump manufacturers and the industry's need to pump . Screw Pumps Applications. The applications of screw pumps include the following. These pumps have many uses in a variety of applications in industries like oil, manufacturing, gas, and mining. Most of the pump applications are high viscosity fluids like asphalt, otherwise oil, multi-stage liquid, which means there is fluid and steam mixed.


What is a Screw Pump? | Types of Screw Pumps | PowerZone


Over the years, the pumping technology of choice in many fluid-transfer applications — from oil and gas and chemical production to liquid terminals that are supplied by pipelines, barges, rail cars and trucks — has been the centrifugal pump. Their method of operation — fluid enters the pump impeller along or near the rotating axis and is accelerated by the impeller, flowing radially outward into the volute discharge port — makes them well-designed for high-volume transfer applications.

Centrifugal pumps also perform relatively well with water-like fluids that must be transferred through piping networks with variable flow rates.

Still, screw pumps applications, a different technology — positive displacement twin and triple screw pumps screw pumps applications can be a more versatile, reliable and efficient alternative than centrifugal pumps in the fluid-handling operations that are critical to many industries. This article illustrates how effective screw pumps can be as an alternative to their centrifugal cousins.

A family of highly efficient and versatile twin and triple screw pumps is designed to meet the needs of the many different fluid handling applications encountered in the oil and gas production and supply chains.

All images courtesy of Blackmer. The main challenge in making the screw pump a more prevalent option in liquid-handling applications is convincing operators to move away from a technology that is conceded to be the default one for numerous jobs. Generally speaking, the bulk of the fluids handled in industrial applications have low viscosities and must be transferred at very high flow rates, which plays to the operational strength of centrifugal pumps.

In many cases, for instance, screw pumps applications, oil and gas and chemical processing systems have been designed around the screw pumps applications technology rather than the other way around. They know how centrifugal pumps operate and their benefits, and they are confident the pumps are the best technology to help them meet their goals. Centrifugal pumps have gained acceptance as a go-to technology for various fluid-handling applications.

In reality, a better alternative may be the positive displacement screw pump. Operators can maximize their ability to handle a wider array of fluids at higher viscosities, flow rates and pressures with overall lower total cost of ownership.

To illustrate this mindset, screw pumps applications, in some cases a design engineer — instead of considering a different pumping technology — will blend or heat raw crude oil to manipulate the process and get the viscosity of the fluid down to less than centistokes cStwhich makes it easier for the centrifugal pump to handle.

In this instance, they are reconditioning the fluid screw pumps applications fit the pumping technology — irrespective of the cost impact. In other words, when measures like this are taken to satisfy the needs of the pump, the popularity of centrifugal pumps in liquid-transfer applications becomes something of a self-fulfilling prophecy.

Triple screw pumps are made to handle clean lubricating fluids without solid content across a wide range of viscosities, temperatures and pressures. This method of operation delivers smooth, constant product flow with low noise and high levels of energy efficiency.

No matter how a liquid might be reconditioned, operators must still take care to ensure the centrifugal pump is operating on its Best Efficiency Point BEP. The BEP is the point at which the pump works at its highest level of efficiency. Centrifugal pumps rarely operate at their BEPs.

Twin and triple screw pumps were designed to fit in the screw pumps applications below-deck confines that are common on many types of ships used to transport liquid cargo around the world. Ensuring operation at the BEP can be a time-intensive task since screw pumps applications pump must be monitored screw pumps applications and adjusted, screw pumps applications, which consumes man hours and money.

Additionally, meeting production rates and quotas has always been top priority in liquid-transfer operations, but as operating costs have continued to rise, a call for increased operational efficiency in terms of the energy required and consumed during pumping operations has been issued. In this area, centrifugal pumps can also fall short. As mentioned, the solution to the shortcomings of centrifugal pumps can be positive displacement PD screw pumps.

The problem is not only overcoming the built-in advantages of familiarity with centrifugal pumps and the subsequent vast installed base, but it is also getting engineers to acknowledge or even become aware that alternatives like screw pumps exist. Simply put, many engineers are not taught about screw pumps in their studies, and many who are aware of them have a preconceived notion of their shortcomings, or that they are nothing more than lube pumps capable of handing only low flow rates.

In truth, the design of PD screw pumps makes them capable of handling various liquids — even those with higher viscosities. The operating principle involves opposed screws engaged to form a sealed cavity with the surrounding pump casing. As the drive screws turn, the fluid is shifted and steadily and screw pumps applications conveyed to the discharge port of the pump, which creates a volumetrically consistent flow rate regardless of the pumping pressure, screw pumps applications.

Screw pump technology in oil and screw pumps applications fluid-handling applications offers several benefits:. Specifically, two types of screw pump designs are most effectively used in industrial liquid-transfer applications: twin screw with timing gear WTG and triple screw. This design helps the pump achieve the highest flow rates of any rotary PD pump, even at varying backpressures and viscosity levels.

These design characteristics make screw pumps suitable for all types of transfer applications, including low- or high-viscosity, lubricating or nonlubricating, neutral or aggressive, and clean or contaminated fluids.

They are designed with a male drive spindle, two female secondary spindles and a case that contains the screws, which allows the fluid to move smoothly and continuously in an axial direction from suction to discharge. It is easy screw pumps applications see why industrial operators have come to rely so heavily on centrifugal pumps for their fluid-transfer needs.

It is a technology that has proven over many years to fit in whole pumping systems that have been designed to optimize complicated production and supply chains, screw pumps applications. But these operators must also be open to considering alternative technologies that have been shown to create operational advantages. Such screw pumps applications the case with PD screw pumps and the role they could play in optimizing fluid transfer in many industries.

Josh Pepper is the global product manager — screw pumps for Blackmer, located in Grand Rapids, Michigan. You can find more information about PSG at psgdover.

Pepper can be reached at or josh, screw pumps applications. Features Pump Systems. Josh Pepper — January 1, Tags: December About the Author Josh Pepper. Related Posts Looking ahead to projected instrumentation market growth in Robyn TuckerDecember 28, How fluctuating flow affects flowmeters Chris MillsDecember 26, Unitized piston breathes life into heavy-duty hydraulic cylinder applications Ryan WebsterDecember 21, We use cookies to ensure that we give you the best experience on our website.

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screw pumps applications

 

May 04,  · However, a different technology—positive displacement (PD) twin- and triple-screw pumps—can also be a versatile, reliable and efficient choice in the oil and gas industry. One of the biggest challenges in making the screw pump more prevalent in oil and gas applications is convincing industry operators to try another technology. In today's upstream and midstream oil and gas environment, screw pumps are playing a larger role in what has traditionally been a centrifugal and reciprocating pump market. This is due in large part to technological innovation by screw pump manufacturers and the industry's need to pump . Jan 01,  · In fact, the deliverable flow rate of a PD screw pump, unlike a centrifugal pump, increases as the fluid’s viscosity increases. These design characteristics make screw pumps suitable for all types of transfer applications, including low- or high-viscosity, lubricating or nonlubricating, neutral or aggressive, and clean or contaminated fluids.