(Bonve Cam-Type Twin Rotor Pumps)

I.High-Viscosity Media Handling

Rotor pumps deliver exceptional viscosity adaptability(1–1,000,000 mm²/s),fundamentally overcoming centrifugal pumps'limitations.This advantage stems from their positive displacement principle:sealed chambers formed by rotors and pump cavities advance media via rotation,where rising viscosity reduces internal leakage losses.Example:Transporting polymer-grade epoxy resin(viscosity>500,000 mm²/s):

Centrifugal Pump Failure:

-Head loss>30%when viscosity>20 mm²/s

-Cavitation bubbles form at>550 mm²/s,causing severe vibration

Rotor Pump Efficiency:

-8–12%volumetric efficiency gain per 100,000 mm²/s viscosity increase(ASME B73.3-2022)

-Friction power rise limited to 2–5%

-Non-Newtonian Case:Chocolate slurry transfer,where rotor pumps overcome thixotropy-induced viscosity spikes,preventing motor burnout from sudden resistance surges.

II.Self-Priming&Gas-Handling Capabilities

Self-Priming Mechanism:

Precision gaps(0.05–0.1mm)between rotors and covers create vacuum chambers.Semi-submerged rotation generates 635–710 mmHg vacuum,enabling 9m vertical suction.Critical in hazardous fluid unloading(e.g.,tanker trucks),eliminating explosion risks from residual liquids—unlike centrifugal pumps requiring$20,000+vacuum assist systems.

Gas-Liquid Transport Limits:

Centrifugal Pumps

>5%gas content causes:

•Gas locking in impeller channels(>40%head collapse)

•Axial force imbalance→bearing failure(major cause in refinery light-hydrocarbon accidents)

Rotor Pumps

Maintain continuous flow at 20%gas content:

•Volumetric efficiency>75%

•Gas forcibly compressed/discharged via rotor meshing(e.g.,25%CO₂tolerance in beer filling lines)

III.High-Pressure&Low-Shear Solutions

High-Pressure Micro-Flow Technology:

For flows≤15 m³/h&pressures≥1.4 MPa,rotor pumps ensure stability through:

1.Gear rotors:20CrMnTi carburizing-quenching(surface hardness HRC 60–63)

2.Topology-optimized pump bodies(ANSYS Workbench peak-pressure simulation)

3.Dual silicon carbide mechanical seals(pressure gradient:30 MPa/100mm)

>Application:Nylon 66 melt booster pump operating 12,000 hours leak-free.

Shear-Sensitive Media Protection:

•Cam Pumps:120°phased triple-helix rotors reduce shear to 0.5–1.2 N/m²

•Single-Screw Pumps:Stator rubber optimized to Shore 55°±5°,achieving>99%live-cell viability(validated in monoclonal antibody production).

Bonve remains wholeheartedly dedicated to perfecting rotor pumps,delivering customized conveying and mixing solutions globally.For technical inquiries,product selection,case studies,or collaborations,contact us anytime:

Tel:+86-574-87588986/+86-13586591794

Website:[www.bvpumps.com](http://www.bvpumps.com)

Email:market@bonvepumps.com

We look forward to partnering with you,advancing industrial fluid transfer through precision innovation.