The Ultimate Solution Guide

All You Need to Know About Rotary Lobe Pumps

Find the Perfect Rotary Lobe Pump for Your Application

Looking for a reliable and efficient rotary lobe pump for your application? Our ultimate solution guide provides everything you need to know about rotary lobe pumps, from their design and operation to their applications and benefits. Whether you’re in the oil & gas, food and beverage industry, pharmaceuticals, or wastewater treatment, our guide can help you find the perfect rotary lobe pump to meet your specific needs.
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What is a Rotary Lobe Pump?

A rotary lobe pump is a type of positive-displacement pump that uses a pair of rotating lobes to draw in and trap liquid. Unlike other pumps, a rotary lobe pump can deliver a consistent flow rate regardless of discharge pressure. Its structure is similar to an external gear pump, but the lobes don’t touch or turn each other.

With their ability to handle highly viscous fluids and strong solids passages, rotary lobe pumps find applications in a range of industries, including chemical, oil, food, agriculture, and sludge handling.

Yaness rotary lobe pump

Working Principle

How Does a Rotary Lobe Pump Work?

A rotary lobe pump transfers liquid by the actions of rotating lobes. The pump consists of two lobes supported by separate shafts. When the pump starts working, the counter-rotation of the two lobes creates a vacuum that primes the fluid. With continuous rotation, the fluid fills the pump chamber and is then pushed out of the chamber.

The pump can also pump fluids in either direction without restriction due to its reversible pumping direction. See the Rotary Lobe Pump Diagram for a visual representation. This diagram shows the basic structure of a rotary lobe pump and how it operates. By understanding the working principle of a rotary lobe pump, you can better appreciate its advantages and choose the appropriate pump for your application.

Rotary Lobe Pump Diagram
Rotary Lobe Pump Diagram

The Advantages of Rotary Lobe Pump

Rotary lobe pumps are versatile and reliable pumping solutions used in a wide range of industries, from food and beverage to wastewater treatment. Yaness rotary lobe pumps stand out among other pump types for their exceptional performance and unique features, providing several advantages to users. In this section, we will introduce the eight key advantages of using a Yaness rotary lobe pump and explain why it is a popular choice for various applications.

Yaness rotary lobe pumps are highly versatile and capable of handling a wide range of fluids, making them suitable for use in various industries, including food and beverage, chemical processing, and wastewater treatment. These pumps are designed to handle fluids with different viscosities, from thin liquids to highly viscous fluids with viscosities up to 10^6 cp. They can also handle mixtures of liquids, solids, and gases, making them ideal for pumping applications that involve complex fluids.

One of the key advantages of Yaness rotary lobe pumps is their strong solids passage capabilities. These pumps can handle solid particles up to 8mm in diameter, such as hard spherical solids, or up to 80mm in diameter for compressible solids. This feature is particularly beneficial for applications that involve pumping fluids with high solids content, such as wastewater treatment, slurry transfer, and food processing. With their ability to handle a wide range of fluids, including those with high solids content, Yaness rotary lobe pumps provide a reliable pumping solution for a diverse range of industries and applications.

Yaness Rotary lobe pumps can pump fluids in either direction without any restrictions, it allows for greater flexibility in various applications.

For example, in the food and beverage industry, this feature allows for the easy transfer of products from one processing line to another, without the need for additional equipment or piping. In wastewater treatment applications, reversible pumping direction is useful for cleaning out pipes or reversing the flow to dislodge clogs or blockages. This feature also helps to prevent damage to the pump in case of accidental flow reversal.

Overall, the reversible pumping direction of rotary lobe pumps is a valuable feature that adds to their versatility and ease of use.

All spare parts of Yaness rotary lobe pumps can be easily replaced on-site without the need to disconnect suction and discharge fittings. This is a significant advantage for industries that rely on continuous operation and cannot afford downtime.

With the ability to quickly and efficiently replace parts such as seals, lobes, wear plates, and liners, maintenance can be performed without major interruptions to production processes.

This reduces associated costs such as lost productivity and repair expenses. Additionally, the simplicity of the maintenance process means that the pump can be back up and running in no time, ensuring that operations can resume without delay.

Overall, the ease of maintenance of Yaness rotary lobe pumps is a key factor in their popularity among a wide range of industries.

Yaness rotary lobe pumps feature a unique 3-wings helical lobe design that provides 98% volume efficiency and pulsation-free operation.

This design ensures a smooth and constant flow of fluids, which is essential for applications that require accurate and precise fluid delivery. Additionally, the absence of pulsation helps to reduce the wear and tear on the pump and associated piping, resulting in longer service life and reduced maintenance costs.

The pulsation-free operation also makes Yaness rotary lobe pumps an ideal choice for applications that require low noise levels and minimal vibration, such as in the food and beverage industry.

Overall, the free pulsation feature of Yaness rotary lobe pumps is a significant advantage that sets them apart from other pump types.

Yaness rotary lobe pumps have impressive performance capabilities, making them an excellent choice for a wide range of applications. With a large flow range of 1-6400gpm or 1450m3/h, these pumps can handle significant amounts of fluid, making them ideal for high-volume applications. Additionally, they have high-pressure capabilities of 1-260 psi or 18 bar, allowing them to pump fluids with ease, even in challenging environments.

Furthermore, Yaness rotary lobe pumps have strong self-priming capabilities of up to 26 ft or 8 meters without the need for a vacuum system. This feature is particularly useful in applications where the pump may need to lift fluid from a lower level or prime itself after sitting idle for an extended period.

Overall, the excellent performance capabilities of Yaness rotary lobe pumps make them a reliable and efficient choice for many different pumping applications.

Yaness rotary lobe pumps can run intermittently without any liquid, and the oil in the chamber cools and lubricates the seals, eliminating the need for flushing.

This is particularly useful in applications where there may be occasional interruptions in the flow of fluid, or where the pump needs to be shut down temporarily for maintenance purposes.

This feature is particularly beneficial in applications where there are concerns about contamination or the need for high levels of hygiene. Yaness rotary lobe pumps can be used in food and beverage processing applications, pharmaceuticals, and other industries that require strict adherence to hygiene standards. The ability to run dry also means that the pump is less likely to suffer from damage due to overheating or other issues that can arise from prolonged operation without any fluid.

Overall, the dry run ability of Yaness rotary lobe pumps makes them a reliable and low-maintenance pumping solution for a wide range of industries and applications.

Yaness rotary lobe pumps can come with an optional built-in reducer, which eliminates the need for an expensive external reduction or gear motor. This allows for greater flexibility in pump design and installation, as well as potential cost savings for users who choose to include this feature.

The built-in reducer feature of Yaness rotary lobe pumps provides several benefits beyond cost savings. By eliminating the need for an external reduction or gear motor, it allows for a more compact pump design, making it easier to install in tight spaces. It also reduces the number of components and potential failure points in the pump system, improving overall reliability and reducing maintenance requirements.

Furthermore, the built-in reducer feature allows for greater flexibility in pump design, as users can choose the optimal pump speed for their specific application without needing to rely on external speed control systems. This can result in improved efficiency and reduced energy consumption.

Overall, the optional built-in reducer feature of Yaness rotary lobe pumps offers a convenient and efficient solution for users, providing cost savings, improved reliability, and greater design flexibility.

Yaness rotary lobe pumps are available in a fully supported type with inboard and outboard bearings, ensuring both ends of the shafts are fully supported.

This design feature is particularly useful in industries that require consistent and reliable pumping performance, such as the food and beverage industry, where the pump must handle a wide range of fluids with varying viscosities and solids content. The fully supported type also ensures that the pump operates smoothly, reducing wear and tear on the equipment and minimizing downtime for maintenance.

Overall, the fully supported type of Yaness rotary lobe pumps is a reliable and efficient solution for various pumping needs, providing excellent performance and durability to ensure continuous operation in demanding environments.

The Disadvantages of Rotary Lobe Pump

While Yaness rotary lobe pumps offer many advantages, such as versatile fluid handling and efficient maintenance, it is important to acknowledge their disadvantages as well. One main disadvantage of rotary lobe pumps is their higher built cost compared to other pump types.

However, this initial investment is recouped by their reliable performance and reduced downtime and maintenance costs in the long run. It is important to consider both the advantages and disadvantages of a rotary lobe pump to determine if it is the best option for your specific pumping needs.

Rotary Lobe Pump Vs. Other Pump

Rotary lobe pumps have a unique design that makes them better suited for certain applications than other pumps. Here is a comparison of rotary lobe pumps with other types of pumps.

  • Superior for pumping high viscosity liquid, abrasives and a mixture of air and fluid.
  • Reversible pumping direction.
  • Dry run ability and strong solids passage.
  • Low speed and high efficiency.
  • Maintenance in place.
  • Low fluid shear and free pulsation.
  • Provides constant pressure at different flow rates or different pressure at the same flow.
  • Lower spare parts and repair cost.
  • Easy to maintain; one person can replace all spare parts without removing piping.
  • Ability to dry run intermittently.
  • Less installation space, about 1/3 of PC pumps.
  • Stronger solids passage.
  • Less maintenance time and downtime.
  • Longer service life.
  • Ability to handle contaminants, while sliding vane pumps can only pump very clean fluid.
  • No need for a filter, and cleaning labor is not necessary.
  • Reversible pumping direction without limit, saving time and cost.
  • Strong self-priming ability, up to 26 ft.
  • Can dry run intermittently, with oil at seal chamber cooling the seals.
  • Longer service life.
  • Can pump widely varying fluids and handle high viscosity and corrosive liquids.
  • Strong solids passage and can handle fiber and a mixture of air, solids, and fluid.
  • Higher efficiency, up to 85%.
  • More steady.

Rotary Lobe Pump Application

Rotary lobe pumps play a critical role in the oil and gas industry for various purposes, including:

  • Drilling Fluid: These pumps transfer drilling fluids, such as mud and water, during drilling operations.
  • Crude Oil: They are used to transfer crude oil from the wellhead to storage tanks or transportation vessels.
  • Produced Water: Rotary lobe pumps transport produced water for treatment and disposal during the drilling process.
  • Oil Spill Recovery: In case of an oil spill, rotary lobe pumps recover the spilled oil from water surfaces.
  • Fuel Transfer: These pumps move fuel from storage tanks to fuel trucks or aircraft.
  • Oil Sludge: Rotary lobe pumps transfer oil sludge for further processing and disposal.
  • Waste Oil: They are also used for transferring waste oil for further processing and disposal.
  • Oil-Water Mixture: Rotary lobe pumps transport oil-water mixture for further processing and disposal.
  • Tank Filling & Emptying: These pumps fill and empty storage tanks in the oil and gas industry.
  • Hydraulic Fracturing: Rotary lobe pumps transfer fracturing fluids during hydraulic fracturing operations.
  • Enhanced Oil Recovery: They transport surfactants and polymers for enhanced oil recovery operations.
  • Produced Gas: Rotary lobe pumps move produced gas from the wellhead to processing facilities.

Rotary lobe pumps find extensive use in the chemical industry for various applications, including:

  • Slime: These pumps transfer slime during chemical production processes.

  • Bitumen: Rotary lobe pumps are used to transfer bitumen for further processing and refining.

  • Natural Latex: These pumps facilitate the transfer of natural latex during the production of rubber products.

  • Cosmetic Raw Materials: Rotary lobe pumps help in the transfer of cosmetic raw materials during the production of cosmetics and personal care products.

  • Liquid Detergent: These pumps support the transfer of liquid detergent during the production of cleaning products.

  • Acids: Rotary lobe pumps assist in the transfer of acids in chemical production processes.

  • Viscose: These pumps ease the transfer of viscose during the production of rayon and other textiles.

  • Polymers: Rotary lobe pumps are utilized to transfer polymers during the production of plastic and rubber products.

  • Soapstock: These pumps facilitate the transfer of soapstock during the production of soap and other cleaning products.

  • Chemical Waste: Rotary lobe pumps are employed to transfer chemical waste for further processing and disposal.
  • Chemical Feedstock: These pumps play a role in the transfer of chemical feedstock for further processing and refining.
  • Solvents: Rotary lobe pumps are involved in the transfer of solvents in chemical production processes.
  • Adhesives and Sealants: These pumps assist in the transfer of adhesives and sealants during their production.
  • Paints and Coatings: Rotary lobe pumps help in the transfer of paints and coatings during their production.
  • Explosives: These pumps enable the transfer of explosives during their production.

Rotary lobe pumps are widely used in various applications related to wastewater, slurries, and mud. Here are some examples:

  • Wastewater treatment: These pumps facilitate the conveyance and transfer of wastewater during the treatment process.
  • Pumping station support: Rotary lobe pumps aid in the transfer of fluids and solids, supporting pumping stations.
  • Flood control and drainage: These pumps assist in the transfer of water and other liquids for flood control and drainage purposes.
  • Oil spill recovery: They are employed for recovering oil from water surfaces in the event of an oil spill.
  • Bentonite transfer: They are utilized for transferring bentonite in drilling operations and civil engineering projects.
  • Grease sludge handling: They are used to handle grease sludge, which is then processed or disposed of further.
  • Oil-based mud transfer: These pumps are involved in the transfer of oil-based mud used in drilling operations.
  • Drilling mud transfer: Rotary lobe pumps are used for transferring drilling mud during drilling operations.
  • Sludge transfer: They are involved in the transfer of different types of sludge, including sewage sludge and paper mill sludge.
  • Industrial wastewater transfer: They facilitate the transfer of industrial wastewater for treatment and disposal.
  • Chemical slurry transfer: These pumps are utilized for transferring chemical slurries in various chemical processes.
  • Food and beverage waste transfer: They are involved in the transfer of food and beverage waste for further processing or disposal.
  • Mining slurry transfer: Lobe pumps are utilized for transferring mining slurries in mining operations.
  • Cement slurry transfer: These pumps are used for transferring cement slurry in various construction projects.

Rotary lobe pumps are widely used in food processing applications for the transfer of various liquids and solids. Some of the specific applications include:

  • Fruit and Fruit Segments: These pumps are used for processing and packaging fruit and fruit segments.
  • Animal By-Products: They are used to transfer animal by-products such as blood, guts, bones, heads, and hooves for further processing and disposal.
  • Wine Transfer: Rotary lobe pumps are utilized for the transfer of wine during the winemaking process.
  • Pomace Transfer: They are used to transfer the solid remains of grapes, apples, or other fruits after pressing, also known as pomace.
  • Thin Juice Transfer: Rotary lobe pumps find use in the transfer of thin juice extracted from fruits and vegetables.
  • Molasses Transfer: These pumps are involved in the transfer of molasses, a by-product of sugar production.
  • Sugarcane Liquid Transfer: They are used to transfer various liquids obtained during the sugar refining process.
  • Diatomite with Water Transfer: Rotary lobe pumps are used to transfer diatomite mixed with water for filtration.
  • Chocolate and Confectionery: Rotary lobe pumps are used to transfer chocolate and confectionery products during production and packaging.
  • Beverages: These pumps are utilized for the transfer of various beverages, including juices, soft drinks, and beer.
  • Dairy Products: They are involved in the transfer of dairy products such as milk, cream, and yogurt.
  • Sauces and Condiments: Rotary lobe pumps are used to transfer sauces and condiments during production and packaging.
  • Meat Processing: They are utilized for the transfer of various meat products during processing and packaging stages, including meat slurry, bone broth, and animal fat.
  • Grains and Cereals: Rotary lobe pumps are involved in the transfer of grains and cereals during processing and packaging stages.

Rotary lobe pumps are widely used in agriculture and biogas-related applications, including:

  • Liquid Manure: These pumps are used to transfer liquid manure from storage tanks to fields for fertilization purposes.
  • Biosolids: Rotary lobe pumps aid in the transportation of biosolids from wastewater treatment plants to farms for use as fertilizer.
  • Farm Chemicals: These pumps can be utilized to transfer chemicals such as fertilizers, herbicides, and pesticides in agricultural applications.
  • Fermentation Substrate: Rotary lobe pumps are employed to transfer fermentation substrate for the production of biogas.
  • Renewable Resources: These pumps can be used to transfer renewable resources such as animal waste and crop residues for biogas production.
  • Faeces: Rotary lobe pumps facilitate the transfer of faecal matter for use as a substrate in biogas production.
  • Biogas Substrate: These pumps are involved in the transfer of various substrates used in biogas production, including manure, food waste, and agricultural residues.
  • Fill and Drain the Tank or Pit: Rotary lobe pumps are utilized for filling and draining storage tanks and pits on farms and biogas plants.

  • Seed Coating: Rotary lobe pumps can be used to apply coatings to seeds to protect them from disease and pests.

  • Irrigation: These pumps can aid in the distribution of water in irrigation systems for agricultural applications.

  • Animal Feed: Rotary lobe pumps are involved in the transfer of animal feed from storage to feeding areas in livestock operations.

  • Landfill Leachate: These pumps can be utilized for the transfer of landfill leachate, which is collected from the bottom of landfills and requires proper disposal.

  1.  

Rotary lobe pumps are widely utilized in mining operations for the transfer of various substances, including:

  • Sludge: These pumps aid in the transfer of mining sludge for further processing and disposal.
  • Lime Milk: Rotary lobe pumps facilitate the transfer of lime milk used in mining operations.
  • Coal Water Mixture: These pumps enable the transfer of coal water mixtures used in mining processes.
  • Tailings: These pumps are involved in the transfer of tailings generated during the mining process.
  • Water Transfer: These pumps assist in the transfer of water for mining operations, including the supply of water to remote mining sites.
  • Acid Transfer: These pumps facilitate the transfer of acids used in the mining process.
  • Cyanide Transfer: These pumps are involved in the transfer of cyanide solutions used in gold mining operations.
  • Mineral Processing: Rotary lobe pumps assist in the transfer of various mineral slurries and solutions during mineral processing operations.

  • Adhesives, Glue, and Paints: These pumps are used to transfer and dose adhesives, glue, and paints in various industrial applications.

  • Pulp and Paper Industry: Rotary lobe pumps facilitate the transfer of paper sludge for further processing and disposal in the pulp and paper industry.

  • Wellpoint Systems: Rotary lobe pumps aid in the transfer of air-water mixtures in wellpoint dewatering systems.

  • Water Supply and Wastewater Disposal: These pumps assist in the transfer of water and wastewater for bus, railway, and boat systems.

  • Tanker Trucks: Rotary lobe pumps are involved in filling and emptying tanker truck tanks with various fluids and semi-solids.

  • Viscous and Abrasive Media: These pumps are used for pumping highly viscous and abrasive media in various industrial applications.

rotary lobe pump application

Why Choose Yaness Rotary Lobe Pump?

Advantages Compared to Other Brands of Rotary Lobe Pumps

6400 GPM / 1450 M³/H

Large Flow

260 PSI / 18 BAR

High Pressure

26 FT / 8 M

Strong Suction

Built-in Reducer

Our pumps feature a unique built-in reducer design, eliminating the need for an expensive external reduction or gear motor and saving valuable space in your facility.

Intermediate Chamber

Our pumps feature an intermediate chamber that protects the gear unit from pumped medium leaks in the event of mechanical seal failure. The chamber also cools the seal with inside oil, allowing for intermittent dry runs.

Fully Supported Shaft

Our optional full supported shaft design features an outboard set of bearings that fully support both ends of the shafts, providing more stability and durability.

Single-piece Housing

Each Yaness rotary lobe pump is equipped with a single-piece pump and gear casing, featuring a flow-optimized one-piece design that enhances pump efficiency and ease of maintenance.

Pump Structure and Components

Yaness Rotary Lobe Pump Parts

rotary lobe pump structure​

1, Quick-release Cover. The easy-to-remove cover allows for quick and convenient maintenance without having to dismount the pump.

2, Fully Supported Shaft Design. Design with an outboard set of bearings for smooth running and higher-pressure handling

3, Wear Plates & Liners. Protect the pump casing from wear and prolong the life of the pump.

4, Lobes. Non-contacting lobes, free pulsation. 3-wing screw lobe, straight lobe optional.

5, Oil-filled Intermediate Chamber. Cools & lubricates the seals. Protect the gear unit from pumped fluid leaking in if the seal fails.

6, AGMA Class 9 Synchronization Gear. 

7, AGMA Class 9 Reduction Gear. Eliminate the need for an expensive external reduction or gear motor, no adjustment require .

8, High Quality 42CrMo4 (ASTM 4140) Shaft.

Pump Specifications

Yaness Rotary Lobe Pump Performance

Model Rated Speed (rpm) Rated Flow (usgpm / m³/h) Max Pressure (psi / bar)
YL 10 0-760 0-26.5 / 0-6 230 / 16
YL 18 0-720 0-44 / 0-10 230 / 16
YL 28 0-720 0-66 / 0-15 230 / 16
YL 52 0-630 0-110 / 0-25 260 / 18
YL 87 0-530 0-150 / 0-35 230 / 16
YL 150 0-530 0-260 / 0-60 230 / 16
YL 196 0-640 0-420 / 0-95 230 / 16
YL 224 0-530 0-400 / 0-90 230 /16
YL 300 0-530 0-530 / 0-120 230 / 16
YL 360 0-550 0-660 / 0-150 230 / 16
YL 540 0-550 0-970 / 0-220 230 / 16
YL 720 0-550 0-1320 / 0-300 230 / 16
YL 990 0-500 0-1630 / 0-370 150 / 10
YL 1450 0-500 0-2420 / 0-550 150 / 10
YL 1980 0-500 0-3300 / 0-750 150 / 10
YL 2900 0-500 0-4840 / 0-1100 150 / 10
YL 3434 0-500 0-5720 / 0-1300 150 / 10
YL 3830 0-500 0-6380 / 0-1450 145 / 10
* We offer a variety of pump sizes and configurations to meet your specific needs. Contact us today to learn more about how our rotary lobe pumps can improve your process efficiency and productivity.
rotary lobe pump lobes

Rotary Lobe Pump Material

Our pumps are equipped with a single-piece casing made of durable materials such as ductile iron, carbon iron, stainless steel, bronze, aluminum alloy, or fluorine lining to withstand the demands of harsh operating conditions.

Our lobes are designed with a ductile iron inner core, and can be coated with rubber materials such as NBR, HNBR, VITON, EPDM, or other specified materials for maximum efficiency and durability. Additionally, we also offer fully metal lobes for applications that require them.

Yaness rotary lobe pumps feature a dry running seal with an oil-cooled chamber and abrasion-resistant silicon carbide faces or specified materials to ensure reliable operation and prevent leaks.

Our pumps feature a replaceable wear plate and liner to protect the pump casing and extend the life of the pump. The wear plate is made of materials such as carton steel with chromium plating, stainless steel, bronze, or other specified materials to ensure maximum durability.

Yaness pumps are equipped with a high-quality 42CrMo4 (ASTM 4140) alloy steel shaft to ensure smooth and reliable operation.

Our pumps feature AGMA Class 9 C45E4 (ASTM 1045) carbon steel gears for maximum strength and durability.

The gear housing of our pumps is rugged and heavy-duty, made of ductile iron to withstand the demands of harsh operating conditions.

The Ultimate Guide

Steps to Select the Right Rotary Lobe Pump for Your Business

When it comes to selecting the right rotary lobe pump for your business, there are several key steps that you need to follow. By taking the time to carefully consider each of these steps, you can be sure that you are selecting the right pump for your specific needs. Here are the steps to follow:

Finding the right manufacturer or supplier for your rotary lobe pumps is crucial to success. Yaness as a leader rotary lobe pump manufacturer is a good choice for your business.

You can get high-quality rotary lobe pumps at a fair price here, and Yaness will enable you to deliver your pumps on time.

Selecting the right material is crucial to avoid corrosion or wearing the pump. The material should be chosen based on the chemical composition of the fluid to be pumped, like temperature, viscosity and specific gravity.

We will help you to select the best materials after understanding your application.

To find the right pump model, we have to focus on the characteristics of the pumping fluid, in particular:
  • Flow rate: The volume of fluid passes per unit of time.
  • Pressure: The pressure difference between the inlet and outlet of the pump.
  • Self-priming lift: It’s the vertical distance pumped from the fluid source to the pump.
Model Rated Speed (rpm) Rated Flow (usgpm / m³/h) Max Pressure (psi / bar)
YL 10 0-760 0-26.5 / 0-6 230 / 16
YL 18 0-720 0-44 / 0-10 230 / 16
YL 28 0-720 0-66 / 0-15 230 / 16
YL 52 0-630 0-110 / 0-25 260 / 18
YL 87 0-530 0-150 / 0-35 230 / 16
YL 150 0-530 0-260 / 0-60 230 / 16
YL 196 0-640 0-420 / 0-95 230 / 16
YL 224 0-530 0-400 / 0-90 230 /16
YL 300 0-530 0-530 / 0-120 230 / 16
YL 360 0-550 0-660 / 0-150 230 / 16
YL 540 0-550 0-970 / 0-220 230 / 16
YL 720 0-550 0-1320 / 0-300 230 / 16
YL 990 0-500 0-1630 / 0-370 150 / 10
YL 1450 0-500 0-2420 / 0-550 150 / 10
YL 1980 0-500 0-3300 / 0-750 150 / 10
YL 2900 0-500 0-4840 / 0-1100 150 / 10
YL 3434 0-500 0-5720 / 0-1300 150 / 10
YL 3830 0-500 0-6380 / 0-1450 145 / 10
*Contact Yaness or our dealers for more details and curve.

Regarding shaft support, Yaness supplies two options for different working conditions.

  • Single-end supported: With inboard bearings only, the structure is simple and has fewer repair parts. But when creating high pressure, the shaft may deflect and lead to low efficiency and premature wear.
  • Fully supported: With an extra outboard set of bearing, both ends of the shafts are fully supported because of the design.

A fully supported shaft is ideal if you request smooth running and handle higher pressure.

Single end supported rotary lobe pumpFully supported rotary lobe pump

 

For your existing rotary lobe pump unit,
Are you pay for an expensive gear motor?
Or use a space-hogging external reduction?

For a Yaness rotary lobe pump, you only need several hundred dollars to get a built-in reduction and take less space.
Every model is available in different sizes reduction to meet various speed requests. And it is pre-set by the factory, no adjustment required.

yaness rotary lobe pump with built in reduction

Yaness supplies wear plates and wear liners to protect the pump casing from wear and extend life. Various materials are available.

  • Wear plate: Axial, replaceable, standard configuration.
  • Wear liner: Radial, optional.

rotary lobe pump wear plate and liner

We suggest equipping wear liners if pumping abrasion fluid.

To match a rotary lobe pump, you may need those parts below.

  • Connect type: Various standard flange and nozzle.
  • Engine: Standard motor (Built-in reducer type rotary lobe pump), gear motor, hydraulic motor, and diesel engine.
  • Skids: Standard welded base, hand barrows, trailers, attenuated sound enclosure or specified.
  • Others: Sediment screening tank, heat jacket, etc.

How Easy to Rebuild a Rotary Lobe Pump (Video Manual)

For new installations, please inspect the oil sight glass and add sufficient gear oil from the gear chamber air gap. If you need a brief dry run or there’s a risk of a dry run, please add gear oil to the isolation chamber, and the cover chamber (some models have a cover chamber). The drain holes of the isolation chamber and cover chamber are not blocked by default. You can find suitable plugs in the spare parts. It’s recommended to change the gear oil every 6 months.

Rotary Lobe Pump Exterior Structure

Oil Level Sight Glass: “Check the oil level inside the gear chamber. The oil level must be at or above the middle of the sight glass.”

Gear Chamber Air Gap: “Add oil to the gear chamber from here.”

Isolation Chamber: “Prevents the medium from leaking into the gear chamber.”

Isolation Chamber & Cover Chamber Drain Hole: “By default, it’s not blocked. If there’s liquid leakage from this point, it indicates the mechanical seal has failed. Please replace the seal promptly. If there’s a requirement or risk for the pump to run dry, find the plug in the spare parts and add gear oil.”

Isolation Chamber & Cover Chamber Injection Hole: “Add oil from here.”

Yaness lobe pump allows short-term dry running, but prolonged dry running can damage the mechanical seal and lobes. Please avoid dry running as much as possible.

1, Stop the drive and close the valves. Drain the gear oil if you want to remove the seals or lobes. (Remove the injection holes and drain holes.).

2, Loosen the 4 bolts and only open the cover by a small gap to allow the inside liquid to drain out.

3, Remove the 4 bolts and the cover.

Remove pump cover

We can replace all repair parts after removing the cover.

1, Remove the cover.

2, Dismantle the round nut, washer, oil seal sleeve and rotating seal seat.

3, Connect hydraulic puller and lobe remove tool, screwing into the threaded hole at the lobe.

4, Haul out the lobes.

Remove lobes

Remove the cover side seals. (Optional)

1, Remove the cover.

2, Remove the seal faces with O-ring out of the stationary seal seats at the pump cover.

3, Remove the seal faces with O-ring from the rotating seal seats at the shaft.

Remove the cover side seals

Remove the gear side seals.

1, Remove the lobes.

2, Lift the parallel keys with a suitable tool, then demount them.

3, Unscrew each rotating seal seat using the seal remove tool and pull it off the shaft.

4, Remove the seal faces with O-ring from the rotating seal seats.

5, Remove the seal faces with O-rings out of the stationary seal seats remaining in the pump using a suitable tool.

Remove the gear side seals

Remove the wear plates.

1, Remove the cover.

2, Demount the cover side wear plate.

3, Remove the lobes.

4, Demount the gear side wear plate.

Remove the wear plates

Remove the wear liners. (Optional)

1, Remove the lobes.

2, Demount the wear liners.

Remove the wear liners

Saving Money with Rotary Lobe Pumps

Calculating Total Cost of Ownership (TCO)

When considering the purchase of a rotary lobe pump, it’s important to calculate the total cost of ownership (TCO) to determine its true cost over its lifespan. This includes not only the initial purchase price but also maintenance costs, energy consumption, and other factors. Here are the steps to calculate the TCO of a rotary lobe pump:

  1. Identify the initial purchase price of the pump.
  2. Estimate the annual maintenance costs, including replacement parts and labor.
  3. Calculate the energy consumption of the pump based on its power requirements and the hours of operation.
  4. Estimate the cost of downtime and lost production in case of a pump failure.
  5. Calculate the TCO by adding up all the costs over the expected lifespan of the pump.

Factors Impacting the ROI

Factors that impact the ROI of rotary lobe pumps include the initial purchase price, energy efficiency, maintenance requirements, and the lifespan of the pump. Here are some additional factors to consider:

The ROI of a rotary lobe pump will depend on the specific application and its requirements. For example, a pump operating in harsh environments may require more maintenance and have a shorter lifespan, affecting its ROI.

Choosing a pump with higher energy efficiency can lead to significant cost savings over its lifespan.

A pump that requires less maintenance and downtime will have a higher ROI compared to a pump that requires frequent repairs and replacements.

Choosing a pump with a longer lifespan may have a higher initial purchase price but can result in a higher ROI over time.

In conclusion, calculating the TCO of rotary lobe pumps and considering factors that impact ROI is crucial in making an informed purchasing decision. By choosing the right pump for your application and implementing it successfully, you can achieve significant cost savings and increase your ROI. If you’re interested in learning more about the potential cost savings and ROI of rotary lobe pumps for your business, please fill out the form below and one of our experts will be in touch to provide you with a personalized cost analysis.

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