The Perfect Balance for Quality Chocolate Production
In chocolate manufacturing, the transfer of chocolate mass must be gentle to maintain its quality. Bonve understands this need and offers jacketed lobe pumps designed specifically for chocolate transfers, ensuring the product's flavor and texture remain intact.
Body:
Bonve jacketed lobe pumps are designed for various chocolate manufacturing processes, including the transfer of chocolate mass, filling, and molding. Our pumps are built with a jacket on the chamber, where heating medium circulates to keep the chocolate liquid at the ideal temperature, preventing coagulation and ensuring smooth transfers.
Our pumps are not only gentle on the product but also efficient and hygienic. They are easy to clean and maintain, making them suitable for hygienic applications in the food industry.
Conclusion:
For chocolate manufacturing that demands the highest quality, choose Bonve jacketed lobe pumps. Experience the balance of gentle handling and powerful performance.
On the motor nameplate provided by BONVE Rotary Lobe Pump, we can see two frequency ranges:
1. Constant Torque Frequency Range: 5-50Hz
2. Constant Power Frequency Range: 50-100Hz
How to understand them and use them into your operating?
Constant Torque Frequency Range means that the motor can provide a stable output torque throughout the entire frequency range. This indicates that the output torque of the motor remains unchanged when adjusting the frequency. This is particularly important for rotarylobepumps when handling fluids with increased viscosity due to temperature decrease, as higher viscosity requires lower suitable speeds.
Constant Power Frequency Range means that the output power of the motor remains constant across the entire frequency range. Regardless of the adjusted frequency (speed), the motor maintains a consistent output power. In rotarylobepump applications, constant power frequency allows for better dynamic response to meet the flow rate and pressure requirements when handling low-viscosity fluids, especially during CIP (Cleaning-in-Place) or water washing processes.
Usually, our customers ask: "In the case of constant torque, if the frequency decreases, does the power reduction mean the pump cannot operate normally?"
This is a valid question. Indeed, reducing the frequency will result in a decrease in power. Power reduction means that the mechanical torque output of the motor also decreases.
Within the frequency range of a variable frequency motor, the motor can output the same torque at different frequencies, which is known as the constant torque frequency range. When the frequency decreases, the motor torque remains relatively constant, but the power decreases because power is directly proportional to torque multiplied by angular velocity (Power = Torque × Angular velocity).
When the frequency reduces to a certain extent, the power reduction may prevent the motor from providing sufficient force to drive the pump load, particularly for larger loads or high resistance. Hence, if the frequency is too low, the motor may fail to drive the rotary pump or generate sufficient output power, resulting in the pump's inability to operate properly.
Therefore, during the pump selection process, we carefully inquire about the operating temperature and viscosity from the customers. Based on the actual load requirements and the motor's frequency range, we choose appropriate speeds and power to ensure that the motor can provide sufficient torque and power to meet the pump's load requirements. If you are interested to know details about the Rotary Lobe Pump, pls click here.
Regarding the constant power frequency range of 50-100Hz, is it better to operate at higher frequencies? Can a small pump be used as a large pump? Absolutely not. Running the pump at excessively high frequencies can alter the hydraulic characteristics of the pump, leading to issues such as cavitation, increased pressure pulsation, noise, and vibration. These factors can negatively affect the pump's stability, performance, and lifespan.
We welcome your comments on frequency operating if have any different opinions. Talk to me via cathy@bonvepumps.com or WhatsApp: 0086-13616639068.
High shear homogenizing mixer will inevitably encounter some failures during use. At this time, it is necessary to find out the cause of the high shear homogenizing mixer failure through troubleshooting, and then find out the countermeasures based on the cause of the failure.
The following are some of the faults that may occur in the high shear homogenizing mixer. You can check according to the use of the high shear homogenizing mixer.
When the pump does not discharge or less capacity
1. Check whether the valve at inlet and outlet pipe open.
2. Whether the pipeline setting of the high shear homogenizing mixer is too complicated.
3. Whether the inlet and outlet pipelines of the pump are blocked.
4. The concentration and viscosity of the processed product will reduce the production efficiency of the high shear homogenizing mixer or not discharge the product. Solution: Add a feeding pump to the feed port of the mixer or dilute the product before entering the feed port of the mixer.
5. When the high shear homogenizing mixer is running, the reverse rotation occurs. At this time, it is necessary to immediately turn off the motor, check and adjust the power connection line of the motor. Solution: Adjust the connection line of the motor power supply.
When the pump makes an abnormal sound during use
Hard solid materials such as metal may be input into the cavity of the high shear homogenizer mixing pump, which should be used after cleaning up the debris. For example, if the hard solids deform or damage the main shaft, stator and other parts of the high shear homogenizer mixing pump, you need to replace the corresponding parts.
Leakage of the homogenizer mixing pump during use
1. Check if the sealing ring is damaged;
2. Check whether the sealing surface of the mixer is unevenly stressed and the mechanical seal is damaged. Solution: Replace the corresponding sealing parts.
If the high shear homogenizer mixing pump is improperly operated during use, it will easily shorten the service life of the pump. If there are any problems or malfunctions, you can directly contact Bonve customer service, and we will solve the problem for you immediately.
Bonve homogenizer mixing pump is an high efficiency ultra-fine homogeneous pump with mixing, dispersion, breaking, dissolution, refinery, homogenization, emulsifying and transporting, proceed products are dispersed, refined and emulsified by the rotor and stator in stages, it is suitable for large and medium batch continuous online production or cyclic processing production process.
In production, the homogenizer mixing pump will encounter some faults in the process of use, which will directly affect the production efficiency of the emulsion pump. In case of pump failure, refer to the following four methods for inspection and maintenance:
1. The pump body needs to be cleaned before use;
2. The mechanical seal of homogenizer pump must be supplied with cooling water before it starts, so as not to cause the mechanical seal to dry and break;
3. After the power is turned on, pay attention to the fact that the pump head does not reverse. If the pump head reverses, please stop it immediately and re-wire and restart;
4. When the homogenizer emulsifying pump is in normal operation, pay attention to observe whether there is material leakage from the mechanical seal. If a leakage is found, stop the operation of the equipment, check and eliminate the cause, and replace the mechanical seal;
5. If the concentration or viscosity of the processed material is too high, a Bonve rotary lobe pump must be equipped before the homogenizer mixing pump to avoid overcurrent damage to the motor;
6. If abnormal noise occurs during the use of the pump, shut it down and troubleshoot carefully;
7. After each production, the inside of the pump cavity should be cleaned, so as to not only maintain the working efficiency of the stator and rotor, but also protect the mechanical seal;
8. Before using this equipment, the user needs to formulate corresponding safety production operating procedures to ensure the safety of operators and equipment;
9. Regularly check the stator and rotor, and if they find excessive wear, replace the corresponding parts in time to ensure the effect of dispersion and emulsification.
Refer to the above operation to effectively avoid the failure of the Bonve homogenizing mixer. If you have any questions about the operation, please contact us and we will provide you with a satisfactory answer.
Rotary lobe pumps types
Applications of rotary lobe pumps
Advantages of rotary lobe pumps
Types of rotary lobe pumps
Rotary Lobe pump manufacturers mainly divide their pumps into two types, food sanitary grade lobe pumps and industrial chemical grade lobe pumps.
Applications of lobe pumps
Food sanitary grade lobe pumps include, but limited to:
Industrial chemical grade lobe pumps include, but are not limited to:
Below is the table for applications
Alcohol |
Coffee liquor |
Glycerin |
Mousse |
Sorbitol syrup |
Advantages of rotary lobe pumps
Lobe pump slip
Slip is the portion of the pumped product that is forced back to the suction side of the pump due to pressure through the clearances. Rotary lobe pumps sometimes do not pump the full displacement for which they are rated because of a phenomenon called slip.To allow the pump’s rotors to rotate, small clearances must be maintained between the rotors and rotorcase. Slip will change directly with pressure and clearance, and inversely with viscosity.
Lobe pump clearance
Within the casing of rotary lobe pumps there are clearances, which are the spaces between rotating components and between rotating and stationary components. Clearances are necessary to avoid rotor to rotor, rotor to rotorcase and rotor to rotorcase cover contact. The size of these clearances is related to the pressure and temperature of pump operation.
The key clearances are as follows:
Pressure effect to the pump
The design concept of the rotary lobe pump is to have no contacting parts in the pumphead. This requires having the shaft support bearings to be mounted outside of the pumphead, which results in an overhung load, caused by the rotors fitted to the shafts as shown. The effect of pressure on the rotors will cause shaft deflection, which could result in contact between rotors, rotorcase and rotorcase cover. To allow for this pressure effect, clearances are built into the pumphead between surfaces that may contact.
Temperature effect to the pump
Temperature change can be caused by the fluid being pumped, pump mechanism, drive unit and/or the environment. Any CIP (Cleaning In Place) operation required should also be taken into consideration. Changes in temperature will cause expansion upon heating or contraction upon cooling, to the rotorcase and gearcase components. The most significant result is movement between shaft and gearcase/rotorcase allowing the rotors to move forward or backward in the rotorcase. With the rotors being allowed to move forward there will be a reduction to the front clearance. To compensate for this, manufacturers will increase the clearance.
How viscosity affect pump sizing
Viscosity is a measurement of a product’s resistance to flow. Low viscosity products (e.g. water) have little resistance to flow, while higher viscosity products have a greater resistance to flow. It is key to positive pump sizing and operation because it affects slip within the pump as well as the pressure required to overcome frictional loss in the lines. Higher viscosity products smaller slip inside the pump.
How cavitation affect pump
Cavitation is the formation of vapor bubbles due to insufficient pressure at the inlet of the pump. High product temperature and/or low pressure on the inlet side of the pump can lead to insufficient pressure. Over time, cavitation can seriously damage a pump. Additional pressure energy would be required to supply the pump with the energy it requires to keep from cavitating. Four ways to increase the inlet pressure are raise the level of the product in the tank, pressurize the tank, lower the pump or decrease the product temperature.
Data required for rotary lobe pumps selection Selection
Rotary Lobe pump brands and Manufacturers
WrightFlow, Alfa laval, Waukesha, JEC, Inoxpa, Omac, Apv, Fristam, Jabsco, Xylem, boerger, Netzsch, Johnson, Bonve
Rotary Lobe pump price
For Bonve pump price, it is offered based on the customer’s requests. Below is the main need to supply.
Bonve also can recommend a suitable proposal with the budget.
What is a rotary lobe pump?
Rotary Lobe Pumps are positive displacement pumps able to transferring liquids products,especially for high viscosity, high solidand arefeatured aslow shearing. Gentletransferringmakes them popularused in food, cosmetics and industrial chemicalproducers. No damage to the pumped products.
How rotary lobe pumps work?
Rotary lobe pump working principle is easy to understand. They basically consist of two lobe rotors, which rotate synchronously driven by a pair of synchronous gears in the gearbox. The rotors are driven by the main shaft and sub-shaft to rotate in a synchronous reverse direction, which changes the pump capacity, builds up high vacuum and discharge pressure, thus an efficient pumping is formed.
Parts of rotary lobe pumps
The main parts are including rotors, pump cavity, mechanical seal, shaft, bearings and gears. They are processed by CNC to ensure high precision fabrication.
Constructionmaterials of rotary lobe pumps, but are not limited to:
Product contact metal parts: stainless steel AISI 316, 316L, duplex, 904L
Mechanical Shaft Seals: Tungsten carbide, Silicon carbide
Sealing Materials of O-rings: Viton, EPDM, FFKM
Configuration of rotary lobe pumps, normal types for Bonve brand.
Lobes types and why different need
According to the different product transfer, manufacturers have different lobes design to make sure an efficient feeding and no failure, such as single-wing, bi-wing, tri-lobe, four-impeller, eight or twelve-impeller lobes. See below diagram which shows each lobes type application.
Positive displacement rotary lobe pumps and centrifugal pumps are the two main types used to transfer liquids. However, they have some distinct differences. They shows different talents when transfer liquids.The users should select with careful consideration. The following are the main differences between Positive displacement rotary lobe pumps and centrifugal pumps.
1. The difference in working principle
A Centrifugal Pump transfers the kinetic energy of the motor to the liquid through the rotating impeller. This increases the velocity and pressure at the discharge. The discharge velocity remains constant when motor rpm is constant. On the other hand, Positive displacement rotary lobe pumps suck a fixed volume of fluid in its cavity and force it to discharge into the pump outlet. So, it is a constant volume pump. Centrifugal pumps are high capacity and relatively low-head pumps whereas positive displacement pumps are low capacity high-head pumps.
2. The Difference in fluid handling
A. The rotation speed of rotary lobe pump is directly proportional to the flow rate. For example, when their rotation speed is 100 rpm, the flow rate is 1 cubic, while when the rotation speed is 1000 rpm, it can be understood as 10 cubic, but there is a little efficiency loss, and the flow rate is about 9.5-9.8 cubic meters.
B. The centrifugal pump throws the medium out of the flow channel of the impeller by the high-speed rotation of the motor.
C. The viscosity of medium transferred by the rotary lobe pump is relatively large, such as heavy oil, viscous adhesives, food paste, etc.; The centrifugal pump can only deliver the medium with lower viscosity, and its delivery viscosity can only be lower than 3Cst.
3. The Difference in Performance
When you look at its performance table (Figure 1), centrifugal pumps and rotary lobe pump are quite different.
Centrifugal Pump |
Positive Displacement Rotary Lobe Pump |
A. Flow rate decreases with increasing viscosity |
A. Flow rate insensitive to changing pressure |
B. Flow varies with changing pressure |
B. Flow insensitive to changing pressure |
C. Efficiency decreases at both higher and lower pressures |
C. Efficiency insensitive to changing pressure |
D. Efficiency decreases with increasing viscosity |
D. Efficiency increases with increasing viscosity |
Fig. 1: Centrifugal Pump vs Rotary Lobe Pump Performance
4. The Difference in Inlet Conditions
These two types of pumps also have quite different requirements for inlet conditions. If you encounter periods where the pump remains "dry", a rotary lobe pump will prime on its own without liquid. On the other hand, a centrifugal pump is unable to create a pressure differential by priming without liquid already in the pump.
Centrifugal vs Positive Displacement Pump: Which one to Select?
A Positive Displacement Rotary Lobe pump will be a preferred selection in the following situations:
A. For high viscous applications.
B. For variable pressure conditions.
C. For changing viscosity conditions.
D. For high-pressure applications.
E. For shear sensitive liquids.
However, these are only a few criteria. Site experience accumulation is also required for selecting the right pump. Bonve is the leading manufacturer in rotary lobe pumps since 2001. When you choose a Bonve pump, you not only get the high quality pumps, but you also get the advantage of Bonve's engineering expertise and years of application knowledge in the food, chemical, pharmaceutical and cosmetics industries.
To find out more about Bonve rotary lobe pump, Click on the picture below
Rotary Lobe Pumps by BONVE: The Ultimate Solution for Efficient Fluid Transfer
In industries where precision, reliability, and efficiency are non-negotiable, the choice of pumping technology can make or break operations.
Enter BONVE’s Rotary Lobe Pumps—a game-changer in fluid handling systems. Designed for versatility and durability, these pumps are engineered to meet the rigorous demands of modern industrial applications.
Whether you’re in food processing, pharmaceuticals, chemicals, or wastewater management, BONVE’s rotary lobe pumps deliver unmatched performance. Let’s dive into what makes these pumps a standout choice.
What is a Rotary Lobe Pump?
A rotary lobe pump is a type of positive displacement pump that uses rotating lobes to transfer fluids. Unlike centrifugal pumps, which rely on high-speed impellers, lobe pumps operate at lower speeds while maintaining a gentle pumping action. This makes them ideal for handling shear-sensitive, viscous, or abrasive fluids without compromising product integrity. BONVE’s rotary lobe pumps feature a robust design with two synchronized lobes rotating within a precisely machined casing, ensuring smooth and pulsation-free flow.
Key Features of BONVE Rotary Lobe Pumps
1.High Efficiency & Precision
BONVE pumps are optimized for energy efficiency, reducing operational costs while maintaining consistent flow rates. Their precise lobe synchronization minimizes internal slip, ensuring accurate volumetric delivery even with challenging fluids.
2.Gentle Handling of Sensitive Products
For industries like dairy, beverages, or cosmetics, product consistency is critical. The pump’s low-shear operation preserves the texture, viscosity, and quality of delicate fluids like creams, sauces, or emulsions.
3.Durable Construction
Built with high-grade stainless steel, BONVE pumps resist corrosion, abrasion, and high temperatures. The hygienic design also meets strict sanitary standards (e.g., EHEDG, FDA), making them suitable for food and pharmaceutical applications.
4.Easy Maintenance
The pump’s modular design allows quick disassembly without moving the entire unit. Replaceable lobes and seals reduce downtime, while the CIP (Clean-in-Place) compatibility streamlines sanitation processes.
5.Versatility Across Fluids
From thick pastes and slurries to solvents and oils, BONVE pumps handle a wide viscosity range (up to 1,000,000 cP). They’re also effective for fluids containing solids or particulates, thanks to the generous clearances between lobes and the casing.
Applications of BONVE Rotary Lobe Pumps
Food & Beverage: Transferring syrups, chocolate, yogurt, or beer with zero contamination risk.
Pharmaceuticals: Metering sterile liquids, creams, or active ingredients.
Chemicals: Handling aggressive acids, polymers, or adhesives.
Wastewater Treatment: Moving sludge, grease, or bio-solids.
Cosmetics: Pumping lotions, shampoos, or fragrances.
Why Choose BONVE?
BONVE combines decades of engineering expertise with a customer-centric approach.
Here's why Bonve rotary lobe pumps are trusted globally:
Customizable Solutions: Tailored configurations for flow rates, materials, and sealing options.