A well-known type of positive displacement pump is known as a screw pump. In this type of pump, a group of screws rotate in a housing in a manner that is equivalent to a full 360 degrees. In some circles, they are referred to as "screw water pumps." Because of its superior suction capacity and low maintenance costs in the same speed range, it is widely regarded as the pump that provides the highest level of dependability across a broad spectrum of applications. A recent post published by Linquip provides an overview of the various types of screw pumps. Therefore, read the article carefully. There is a wide selection of screw pumps on the market nowadays to choose from. The following is a condensed explanation of the majority of screw pump types.
- One Screw Pumps
- Two Screw Pumps
- Three Screw Pumps
- Four Screw Pumps
- Five Screw Pumps
One Screw Pumps There are a few other names for screw pumps, including PC pumps, worm pumps, single-cavity pumps, and progressive cavity pumps. These pumps are not typically considered to be members of the family of screw pumps. This is because, rather than being in the form of a screw, the rotor is shaped like a wrinkled round shaft. This particular class of screw pumps can operate in either direction. They function in accordance with the theory of positive displacement. They are made up of a spiral rotor made of metal and two spiral stators made of elastomer. These pumps are appropriate for use with fluids that demand a constant flow that is free of vibration. It is common knowledge that single screw pumps have a large capacity for suction. They have many different applications, such as in the transportation industry, the oil and gas industry, the paint and coatings industry, the paper and ceramics industry, and the chemical industry. These pumps are capable of handling caustic and non-corrosive liquids, as well as food goods and liquids with or without solid components (such as large amounts of water, sludge, wastewater, etc.) (ketchup, yeast, gelatin, etc.). This particular kind of screw pump is quite reasonably priced. In addition to that, it does not clog. Two Screw Pumps This sort of pump, which is sometimes referred to as a twin screw pump (twin screw pumps), is typically utilized for tasks that require a large horsepower output, such as the transfer of heavy oil pipes. A motor provides the motivation for the pump screw, and timing gears are typically what turn the subsequent screw in the sequence. 
Self-priming and rotating pumps are also characteristics of this type of screw pump. These pumps are put to use in a variety of different industries, including the food industry, the energy industry, the marine industry, and the petrochemical industry. The following are some of the characteristics of the two-screw pump:
- They can function at variety speeds
- They can run dry
- They have a low NPSH need
- They can handle a high volume of fluids and viscosities
- They tolerate pollution
- They have a low liquid sheer
- They are extremely reliable
Three Screw Pump It's possible you've heard of these screw pumps being referred to as "three screw pumps." Because there is no timing gear, the position of the pump screw is governed by the motor, while the other two screws revolve around the motor. They are made up of three screws, each of which is driven by a separate electric motor. There is one pilot screw and one driving screw for each of the two screws. An electric motor provides the motivation for the drive screw, which in turn provides the motivation for the driving screw. These screws are in a stacked arrangement. In smaller applications, such as lubrication systems, three-screw pumps are typically the pump of choice. 
Four Screw Pump In most cases, screw pumps of this sort are known as twin screw pumps because each pump rotor has two screws. However, the screws in each pump rotor rotate in the opposite direction from one another. A four-axis pump takes liquid in through the suction port and distributes the liquid evenly at both the beginning and the end of the pump. Both of the fluid currents travel through the pump and then flow toward the pump's center, where they meet and then exit through the outlet. The second rotor of a four-screw pump, like a twin-screw pump, is driven by a timing gear thanks to the design of the pump. In multi-phase applications and oil transfer lines, four-screw pumps are frequently utilized as the pump of choice. Applications that include multiple phases and pipelines frequently make use of pumps with four screws. Five Screw Pump One driving rotor is responsible for turning each of the four screws. This sort of screw pump operates in a manner that is quite comparable to that of a three-screw pump. On the other hand, use five screws rather than three. Similar to 3-screw pumps, these pumps contain a plunge rotor that drives the rest of the screws in the assembly. These pumps have a wide range of applications and are utilized frequently in a variety of fields, such as hydraulics and plumbing oils. 
In conclusion, A positive displacement pump is a sort of rotary pump that delivers a known volume of liquid with each revolution. A screw pump is an example of this type of pump. Depending on the number of screws, screw pumps can be found in a wide variety of configurations, ranging from one to five screws. One variety of screw pump is called a single screw pump, and another variation is called a progressive cavity pump. Because the rotors of these pumps are constructed as twisted round shafts rather than typical screws, they cannot be categorized as screw pumps. This is because of the design of the rotors. In high horsepower applications, the most frequent form of pump that is utilized is a twin screw pump, which is also known simply as a twin screw pump. In applications on a smaller scale, such as lubrication systems, three-screw pumps, which are often referred to as three-screw pumps, are frequently employed. The suction stream of a four-screw pump is split at both ends and then goes to the center outlet. This type of design is known as a double-suction arrangement. Therefore, it is a screw pump of some kind. You have the option of choosing these pumps with either a single suction base or a double suction base. I have made an effort to explain the many varieties of screw pumps in a manner that is simple and straightforward to comprehend. However, if you have any inquiries regarding the pumps described above, we kindly ask that you get in touch with our team of specialists directly. Feel free to sign up for an account with Linquip and submit your inquiries there.