Rotary Lobe Pump
We provide a wide range of Rotary Lobe Pumps
NW65 Rotary Lobe Pump
Product Details:
- Product Type: Rotary Lobe Pump
- General Use: Industrial applications
- Material: Stainless Steel
- Type: NW65
- Pressure: Up to 12bar
- Automatic : Customized
- Flow： 10m3/h
Rotary Lobe Pumps for High-Viscosity Fluid Transfer
The NEWAFLUIDS Industrial Rotary Lobe Pump is designed as a premier positive displacement solution, engineered to deliver consistent, pulse-free flow while maintaining the absolute structural integrity of your medium.
The system relies on two synchronously rotating, counter-rotating rotors to generate suction at the inlet during rotation, thereby drawing in the material to be conveyed. The two rotors divide the rotor chamber into several small spaces, which operate in a specific sequence, repeating continuously to achieve continuous conveying of the medium.
Whether transferring thick dairy creams, highly abrasive chemical slurries, or sensitive pharmaceutical emulsions, our rotary lobe pumps provide the reliability, hygienic compliance, and mechanical uptime that global manufacturers depend on.
What is a Rotary Lobe Pump?
Unlike centrifugal pumps, which rely on velocity and suffer dramatic drops in efficiency as fluid thickness increases, rotary lobe pumps become more efficient with higher viscosities. The flow rate remains highly consistent and relatively independent of changes in system backpressure, making them excellent for precise metering and dosing.
The core of a rotary lobe pump is the periodic change in volume.
Intake: The rotor rotates in reverse, expanding the inlet volume → creating a vacuum → drawing in the medium.
Transport: The medium is sealed within the rotor and pump chamber, smoothly transported to the outlet.
Discharge: The outlet volume decreases → compressing and expelling the medium, continuously without pulsation.
Advanced Design Features of NEWAFLUIDS Rotary Lobe Pumps
Since 2005, NEWAFLUIDS has designed and manufactured fluid handling equipment in China, leveraging cutting-edge engineering tools to ensure long-term durability. Our NW65 and custom models boast features engineered specifically for demanding industrial environments.
Premium Materials of Construction (Wetted Parts)
Pump Body: Stainless steel / Cast iron, corrosion-resistant and easy to clean.
Rotor: Two-lobe / Three-lobe / Claw type / Cam type, suitable for different viscosities and particulate media.
Sealing System: Mechanical seal (commonly used in sanitary grade) / Packing seal, leak-proof and durable.
Drive Unit: Motor + Gearbox, low speed, high torque, and stable operation.
Non-Contacting Lobe Options
The internal rotors do not touch each other or the pump housing. This lack of metal-to-metal contact drastically reduces wear, eliminates the risk of metallic contamination in the product stream, and allows the pump to tolerate brief periods of dry running. Depending on your material’s particle size and viscosity, we offer:
Two-Lobe (Bi-wing) Rotors: Ideal for large soft solids suspension (e.g., fruit pieces, sludges).
Three-Lobe (Tri-lobe) Rotors: Optimized for generic smooth flow with minimal pulsation.
Claw and Cam Type Rotors: Custom-engineered for hyper-viscous pastes.
Heavy-Duty Sealing Systems
According to the different characteristics of the medium, Bonve offers the Single-face balancing mechanical seal, Double-face water cooled mechanical seal, bellows mechanical seal, etc. Targeted seal used ensures zero leakage. All these types can be universally interchanged.
Single-face balanced mechanical seal: Advanced balanced structure design, with self-adjusting function and long service life. Normal type to use. Typical pumped medium: tomato sauce, peanut butter, lotion, shampoo, syrup, yogurt ect.
Double-face water-cooled machine seal: Generally used with hostile media conditions i.e. high viscosity, high solid, hazardous or toxic fluids.
Typical pumped medium: Abrasive Slurries, Chocolate, Hazardous Chemicals, PVC Paste, Photographic Emulsion, Resin.
Key Benefits: Why Global Manufacturers Trust NEWAFLUIDS
Many emulsions, juices, cell cultures, and polymer solutions are permanently broken or degraded under high-shear stress. The gentle, rolling, and lifting motion within our pump chamber preserves the delicate molecular structures and fat globule sizes of your product.
Unmatched High-Viscosity Handling
Our rotary lobe pumps effortlessly handle viscosities ranging from water-like fluids (1 cP) up to ultra-thick pastes exceeding 1,000,000 cP. High-torque gearboxes and low operational shaft speeds (50–300 rpm) ensure thick syrups, honey, and molasses are transferred without overloading the motor.
Reversible and Bidirectional Conveying
By simply reversing the direction of the motor rotation via your PLC control panel, our pumps can change flow directions instantly. This bidirectional capacity makes them incredibly versatile for tanker truck unloading, recycling lines, or clearing pipelines after a production batch.
Sanitary Compliance (CIP / SIP Ready)
Designed with a crevice-free interior and completely free of “dead zones” where product can stagnate and breed bacteria, our sanitary series is fully compatible with Clean-In-Place (CIP) and Sterilize-In-Place (SIP) operations.
Technical Specifications: NEWAFLUIDS NW65 Series
| Parameter | Specification Details |
| Product Type | Positive Displacement Rotary Lobe Pump |
| Material (Wetted Parts) | SS304 / SS316L / Hastelloy |
| Standard Model Code | NW65 Series (Customizations available) |
| Rated Flow Capacity | Up to 10 m³/h (Custom models up to 5000 m³/h) |
| Maximum Discharge Pressure | Up to 12 Bar (Heavy-duty models up to 18-30 Bar) |
| Connection Fittings | Tri-Clamp, ANSI/DIN Flanges, NPT Threaded |
| Drive Automation | AC Motor + Precision Reduction Gearbox (PLC Compatible) |
Cross-Industry Applications
Food & Beverage Processing
Our food-grade stainless steel pumps move yogurt, chocolate sauce, tomato paste, jams with whole fruit pieces, and concentrated juices without fracturing the solids or foaming the liquid.
Cosmetics & Personal Care
From thick shampoos and shower gels containing heavy surfactants to dense cosmetic face creams, foundations, and toothpastes, our pumps ensure uniform dosing without shearing the base emulsions.
Chemical, Petrochemical & Paper
NEWAFLUIDS rotary lobe pumps excel in transferring aggressive chemical raw materials, heavy oils, polymers, latex, starch paste, and primary/activated sludges in industrial wastewater treatment plants.
Key Points for Selecting Rotary Lobe Pump
- Media characteristics: viscosity, temperature, particle size, corrosiveness (stainless steel/rubber material selection).
- Flow rate and pressure: flow rate is proportional to speed; pressure up to 16 bar (industrial grade).
- Sanitary grade: Sanitary rotary lobe pump (304/316L stainless steel, no dead zones, CIP cleaning) is selected for food/pharmaceutical applications.
- Speed control: Low speed (50–300 rpm) is selected for high viscosity; higher speed can be selected for low viscosity.
Comprehensive Comparison Table
| Comparison Item | Rotary Lobe Pump | Centrifugal Pump | Gear Pump | Screw Pump |
|---|---|---|---|---|
| Pump Type | Positive Displacement | Dynamic / Centrifugal | Positive Displacement | Positive Displacement |
| Working Principle | Intermeshing lobes change cavity volume to convey medium | Impeller centrifugal force converts kinetic energy to pressure | Meshing gears trap and push liquid continuously | Twin/Triple screw axial propulsion, sealed cavity delivery |
| Viscosity Adaptation | Low ~ Ultra-high viscosity | Only low viscosity | Medium ~ High viscosity | Medium ~ Ultra-high viscosity |
| Solid Particle Handling | Good, anti-clogging | Poor, easy to wear impeller | Poor, not for large particles | Excellent, suitable for sludge & fiber |
| Flow Stability | Constant flow, unaffected by back pressure | Flow drops obviously with higher head | Stable flow | Ultra-stable, low pulsation |
| Self-Priming Capacity | Excellent, up to 8m | Weak, needs priming first | Good | Very good |
| Shear Force | Low shear, protects sensitive materials | High shear, easy to damage emulsion | Medium shear | Ultra-low shear |
| Pressure Capacity | Medium to high | Low to medium | Medium | High pressure |
| Bidirectional Conveying | Support reversible operation | Not support | Support reversible | Support reversible |
| Noise Level | Low | Medium | Medium-High | Lowest, smooth running |
| Cleaning & Sanitation | Sanitary design available, easy CIP/SIP | Ordinary industrial design | Hard to clean dead corners | Sanitary type optional |
| Main Application | Food, beverage, cosmetic, pharmaceutical, high-viscosity slurry | Water supply, chemical water, low-viscosity liquid | Hydraulic oil, lubricant, resin, glue | Sludge, sewage, heavy oil, pulp, chemical slurry |
| Maintenance Cost | Low, simple structure | Medium | Medium | Low, long service life |
Why choose NEWAFLUIDS
NEWAFLUIDS has manufactured rotary lobe pumps since 2005. Standard and custom designs are available to meet the varied processing requirements of our customers. We design and build our rotary lobe pumps in China. We are all fully equipped with advanced engineering and manufacturing tools.
They are used throughout the process industries for the production of food & beverage, pharmaceuticals, adhesives & sealants, battery slurries, electronic pastes, ceramics, metal blends, inks, coatings, cosmetics & personal care products, plastics, composites, specialty chemicals and many other applications.
FAQ for rotary lobe pump
Q1:What Is the Maximum Viscosity a Rotary Lobe Pump Can Handle?
Rotary lobe pumps can handle viscosities ranging from water-like liquids up to highly viscous materials exceeding 1,000,000 cP, depending on the pump size, speed, and motor power..
Q2:Can Rotary Lobe Pumps Handle Solids?
Yes. Rotary lobe pumps are capable of handling soft solids and suspended particles without excessive damage. This makes them suitable for fruit pulp, sludge, chocolate chunks, and similar applications.
Q3:Are Rotary Lobe Pumps Reversible?
Yes. Most rotary lobe pumps can operate in both directions, allowing reversible flow transfer.
Q4:What Materials Are Used in Rotary Lobe Pumps?
Typical materials include:
- Stainless steel 304
- Stainless steel 316L
- Alloy steel
- Elastomers such as EPDM, FKM, and PTFE
Material selection depends on the application and fluid properties.
Q5：What Is Cavitation in a Rotary Lobe Pump?
Cavitation occurs when vapor bubbles form due to insufficient inlet pressure. These bubbles collapse inside the pump and may cause noise, vibration, and damage.
To reduce cavitation:
- Increase inlet pipe size
- Reduce pump speed
- Improve suction conditions
- Lower fluid temperature if possible
Q6：Can rotary lobe pumps run dry?
Most rotary lobe pumps should not run dry for extended periods because dry running may damage seals and lobes. Some models include special dry-run protection systems.
Q7：What Is the Typical Pressure Range of a Rotary Lobe Pump?
Many industrial rotary lobe pumps operate within:
P=FAP = \frac{F}{A}
Typical discharge pressure:
- 6 bar
- 8 bar
- 12 bar
- Up to 20 bar for special models
| Model | Displacement (L/r) | Rotation Speed (r/min) | Flow Rate (M³/h) | Dischage Pressure (Mpa) | Electrical Power (Kw) | Suc. Pressure (Mpa) | Inlet & Outlet (mm) |
|---|---|---|---|---|---|---|---|
| NW25 | 0.15 | 0-600 | 2 | 0.1-1.2 | 0.55-2.2 | -0.095 | 25 |
| NW40 | 0.32 | 0-550 | 5 | 0.1-1.2 | 1.5-4 | -0.095 | 40 |
| NW50 | 0.65 | 0-550 | 10 | 0.1-1.2 | 2.2-7.5 | -0.095 | 50 |
| NW65 | 1.74 | 0-550 | 20 | 0.1-1.2 | 4-15 | -0.095 | 65 |
| NW80 | 2.48 | 0-550 | 30 | 0.1-1.2 | 5.5-22 | -0.095 | 80 |
| NW100 | 3.65 | 0-550 | 40 | 0.1-1.2 | 7.5-30 | -0.095 | 100 |
| NW125 | 4.60 | 0-550 | 50-80 | 0.1-1.2 | 11-45 | -0.095 | 125 |
| NW150 | 11.56 | 0-420 | 120 | 0.1-1.2 | 22-90 | -0.095 | 150 |
Would you like to start a project with us?
To request more information about a particular homogenizer and application, or to request a quote, fill out our request form by Click”GET A QUOTE”. If you have any questions, don’t hestitate to email us at sales@newafluids.com.