After rigorous technical evaluation, the client selected a batch of Bonve Rotary Lobe Pumps. One year later, in May 2026, our follow-up visit confirmed that the pumps have been operating with zero failures, zero leakage, and sustained high performance.
Application 1: Bonve Lobe Pump for High-Viscosity PU Resin
The Challenge: PU resin is notorious for its extreme viscosity and shear sensitivity. At this facility, the resin reaches a staggering 300,000 cP. Moving such a "paste-like" media at a consistent flow rate while overcoming a high backpressure of 1.2 MPa is a task where most conventional pumps fail due to cavitation, seal failure, or motor overload.
Medium: PU Resin
Viscosity: 300,000 cP
Flow Rate: 10 m³/h
Pressure: 1.2 MPa (High Pressure)
Pump Model: 140BV12-70
Displacement: 6.1 Liter/rev
Technical Edge: The large displacement per revolution allows the pump to run at lower speeds, preventing heat buildup and maintaining the integrity of the PU resin’s chemical structure.
Application 2: Bonve Lobe Pump for Polyol Loading & Unloading
The Challenge: Polyol transfer requires a balance of speed and temperature control. To maintain optimal flow rate, the polyol is handled at 75°C. Any temperature drop during transfer could cause viscosity spikes, leading to inefficient loading or unloading of road tankers.
The Bonve Solution: The Model 65BV12-15 was selected for its versatility and integrated thermal management.
Medium: Polyol
Viscosity: 500 cP
Temperature: 75°C
Flow Rate: 15 m³/h
Pressure: 0.6 MPa
Pump Model: 65BV12-15
Displacement: 1.1 L/rev
Feature: Heating Jacket. This ensures the medium remains at a constant temperature within the pump chamber, preventing crystallization or "freezing" during startup or intermittent operation.
Why Bonve Lobe Pumps? The Results After 12 Months
Following a year of continuous operation, the client reported three key advantages that define the Bonve difference:
1. Superior Stability Under High Pressure
Handling 1.2 MPa discharge pressure with a 300,000 cP medium requires exceptional structural integrity. Bonve’s robust gearbox and shaft design ensured that the pump operated without vibration or pulse-related fatigue, maintaining a steady 10 m³/h flow rate to the production line.
2. Unmatched Seal Reliability
Mechanical seal failure is the #1 cause of downtime in resin plants. Our single mechanical seals survived a full year of high-pressure PU resin service without a single drop of leakage. This reliability protects the production environment and prevents the costly solidification of resins inside the seal cavity.
3. High Viscosity Mastery
Bonve lobe pump technology is specifically designed for "hard-to-pump" fluids. By optimizing the rotor geometry and internal clearances, we achieved high volumetric efficiency even at 300,000 cP, significantly reducing energy consumption compared to traditional gear pumps.
Conclusion
The success at the Anhui synthetic materials facility proves that Bonve is more than just a pump manufacturer—we are a solution provider for the world’s most demanding fluid challenges. Whether it’s the extreme pressure of PU resin or the thermal requirements of polyol, Bonve delivers stability you can trust.
Are you facing high-viscosity challenges? Contact Bonve today to optimize your transfer process.
For more details please contact me:
Andre Chen
Sales Engineer
Mobile/WhatsApp/Wechat: +86 15888591452
Email: bvsales2@bonvepumps.com
