Stainless Steel Rotary 3-Lobe Roots Blower, Oil-Free 1

Stainless Steel Rotary 3-Lobe Roots Blower, Oil-Free 2

Stainless Steel Rotary 3-Lobe Roots Blower, Oil-Free 3

Stainless Steel Rotary 3-Lobe Roots Blower, Oil-Free 4

Stainless Steel Rotary 3-Lobe Roots Blower, Oil-Free 5

Stainless Steel Rotary 3-Lobe Roots Blower, Oil-Free 6

Stainless Steel Rotary 3-Lobe Roots Blower, Oil-Free

In a clean plant, the stainless steel 3-lobe Roots blower gleams—quiet, strong, and precise. Oil-free operation keeps air pure and dry, so food, medical, lab, and water lines stay safe from contamination. Its smooth hum and steady flow bring long life and low care, a smart workhorse that lifts your process with style.

brand name:

QILEE

model number:

PRB-50

Shipping:

Support Sea freight

Payments:

L/C,D/A,D/P,T/T,Western Union,MoneyGram,OA

Place of Origin:

China

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Outlet

40mm-300mm(1.5 "-12");

Caliber(mm)

Rotary Speed(RPM)

850-1950

La(KW)

0.61-1.4

Pressure(mmAq)

One-Stage PRB type 8000mmAq(0.8kgf/cm2)

QS(m3/min)

0.6-160m3/min(21-5700CFM)

rated voltage

220V/380V

Dimensions(mm)

1652*735*906

pressure

Medium Pressure

power source

Pneumatic

application

Industrial Blower

Power

No motor

Product name

Three-Lobe Roots Blower

place of origin

Shanghai, China

Sanitary Efficient Compact Reliable

The Stainless Steel Rotary 3-Lobe Roots Blower delivers oil-free, high-efficiency air with low noise and stable pressure to ensure clean, reliable operation for industrial dewatering, filtration, and chemical dosing systems. Its precision-machined three-lobe rotor, compact stainless-steel body and simple, trouble-free design provide long service life, minimal maintenance and consistent capacity across varying pressures. Packed in standard export cartons with fast 3–20 day delivery options, this Roots Blower combines strict quality control and robust construction to protect your investment and speed installation.

Here are five 4-word subtitle options, each emphasizing a different perspective:

The Stainless Steel Rotary 3-Lobe Roots Blower is an oil-free displacement blower with two counter-rotating impellers that trap and compress air through precision gaps to provide adjustable pressure and flow (outlet sizes 40–300 mm, capacity 0.6–160 m3/min, single-stage up to 0.8 kgf/cm2). Its stainless-steel construction, vibration-balanced rotors manufactured by a four-shaft precision process, and standardized simple structure deliver high efficiency, low noise, long service life and minimal maintenance while ensuring completely oil-free air. Special three-lobe profiles produce small capacity variation with pressure changes and enable reliable, trouble-free operation for sludge dewatering, dosing systems, RO and other industrial applications requiring clean, stable air from a Roots Blower.

Oil-Free Stainless 3-Lobe Blower

The Stainless Steel Rotary Three-Lobe Roots Blower is an oil-free displacement blower with two counter-rotating impellers that trap and compress air through minimal clearances to deliver reliable pressure. Available with outlets from 40 mm to 300 mm and capacities of 0.6–160 m3/min (21–5700 CFM), one-stage models can reach up to 8000 mmAq (0.8 kgf/cm2) while showing only small capacity change with pressure due to a special rotor profile. Designed for low noise and vibration with a simple, trouble-free structure, precise four-shaft processed rotors and strict quality control, this Roots Blower ensures long life and completely oil-free operation for industrial applications.

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Oil-Free Hygienic Efficient Durable

Built on a heritage of precision engineering, this Stainless Steel Rotary 3-Lobe Roots Blower is crafted from corrosion-resistant stainless steel with CNC-machined, dynamically balanced rotors to ensure oil-free, contamination-free operation for sanitary and high-purity applications. Its 3-lobe rotary design delivers smooth, pulsation-free airflow with high volumetric efficiency, low vibration and low noise, making it ideal for food, pharmaceutical and chemical processes. Features and advantages include oil-free construction, hygienic stainless surfaces, compact footprint, easy cleanability, long service life and reduced maintenance, providing reliable, energy-efficient performance and lower lifecycle costs.

Material introduction

The Roots Blower features a stainless steel housing and precision‑machined three‑lobe rotors, giving excellent corrosion resistance and easy cleaning for oil‑free air delivery. Rotors are produced with an advanced one‑pass four‑shaft machining process to ensure tight tolerances, balanced profiles and stable displacement under changing pressures. Wear‑critical parts receive high‑grade finishing and durable materials alongside robust bearings to deliver long service life, low maintenance and contamination‑free operation.

◎ Stainless Steel Housing

◎ Precision Three‑Lobe Rotors

◎ Seals, Bearings & Treatments

FAQ

What kinds of applications are best suited for a stainless steel rotary 3‑lobe Roots blower that is oil‑free?

This type of blower is ideal where contamination-free, corrosion‑resistant gas handling is required. Typical uses include food and beverage processing, pharmaceutical and biotech operations (sterile transfer, freeze‑drying, vacuum packaging), clean pneumatic conveying of powders/granules, wastewater aeration, laboratory and pilot plants, and many chemical or corrosive‑service tasks when stainless internals are specified. It’s also useful for processes requiring oil‑free air/gas such as drying, stripping, and certain medical applications. For explosive or toxic gases you’ll need appropriate certifications and safety measures.

Can I use this blower for sterile or food‑grade processes and how should it be cleaned or sanitized?

Yes—if the blower is built with sanitary finishes, FDA/USP‑compatible seals and polished stainless internals, it can be used in food and pharmaceutical settings. Cleaning methods depend on the model and seals: some units support CIP (clean‑in‑place) or surface cleaning with approved detergents; others may permit limited steam cleaning. Autoclaving the whole assembly is usually not recommended unless the manufacturer explicitly rates it. Always follow the supplier’s cleaning protocol, choose compatible elastomers, and ensure that seals and bearings are suitable for your cleaning agents and temperatures.

What gases, humidity levels, and particulates can this blower handle?

Stainless steel construction provides good corrosion resistance for many gases, but compatibility depends on the specific alloy and seal materials. These blowers perform best with clean, relatively dry gases. Contaminants and particulate should be removed with proper inlet filtration to prevent wear and blockages. High humidity or condensation can cause corrosion, corrosion‑induced wear, or performance loss—install condensate separators or demisters as needed. For strongly corrosive or abrasive gases, or for explosive atmospheres, specify special materials, coatings, or explosion‑proof equipment and consult the manufacturer.

What installation and operating precautions should I follow for reliable performance?

Key precautions: install inlet filters and silencers, provide straight inlet/outlet runs per manufacturer recommendations, include check valves or pressure relief to prevent reverse flow or dead‑heading, ensure proper shaft alignment and rigid mounting with vibration isolation, allow adequate cooling and airflow to the motor, and avoid running against excessive backpressure. Use a variable speed drive if you need flow control or energy savings. Follow proper start‑up and shut‑down procedures and ensure the unit is operated within the rated temperature, pressure and speed limits.

What maintenance does an oil‑free stainless steel Roots blower require and how often?

Oil‑free" refers to the compression chamber, not necessarily bearings or gearboxes. Maintenance tasks typically include regular inspection and replacement of inlet/outlet filters and silencers, checking vibration and noise levels, monitoring bearing condition (some have sealed, pre‑lubricated bearings; others need periodic greasing), inspecting seals and couplings, verifying clearance and rotor timing where applicable, and replacing worn parts with OEM spares. Frequency depends on duty cycle and process conditions—daily visual checks in critical processes, more detailed inspections at manufacturer‑recommended intervals (e.g., every few hundred to thousand operating hours). Always follow the supplier maintenance schedule.

How do I choose the right model and what performance limits should I expect?

Selection should be based on required flow (m3/h or CFM), required pressure or vacuum head (inlet/outlet pressures and allowable backpressure), gas composition and temperature, allowable contamination/cleanliness, duty cycle, noise limits, and environmental or regulatory requirements. 3‑lobe Roots blowers are positive displacement units that deliver nearly constant flow for a given speed but have limited differential pressure capability—efficiency declines as pressure rises. Consult the manufacturer’s performance curves and specify inlet conditions, maximum allowable pressure, temperature range, and any material/certification needs so they can recommend a model and any accessories (filters, silencers, VFDs, relief valves) to meet your application.

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