How is airflow controlled in a Roots blower?

Airflow can be controlled by adjusting motor speed, using a variable frequency drive (VFD), or changing pulley ratios for belt-driven models.

What pressure range can a Roots blower handle?

Roots blowers typically operate in low to medium pressure ranges, commonly up to 80 kPa depending on the model and application.

Is the air delivered by a Roots blower oil-free?

Yes. The air chamber is oil-free because lubrication oil is sealed within the bearing and gear chambers, making it suitable for clean air applications.

What materials are used for Roots blower rotors?

Rotors are made of high-strength cast iron or alloy steel and are precision-machined using CNC equipment for accurate clearances and long service life.

What bearings are used in Zhaner Roots blowers?

Zhaner Roots blowers are equipped with NSK bearings or other high-quality, cost-effective bearing brands according to customer requirements.

Energy-Saving 3-Lobe Roots Air Compressor for Biological Aeration

Name: Energy-Saving 3-Lobe Roots Air Compressor for Biological Aeration
Brand: Shandong Zhaner Machinery Co., Ltd.
SKU: 2132379722

Shandong, ChinaShandong Zhaner Machinery Co., Ltd.

US$500.00-600.00

1 Piece

Sample price:US$200.00/piece.Request sample

Product profile

Customization

Available

Material

Stainless Steel

Usage

for Manufacture

Model NO.

WSR100mj

Flow Direction

Axial Flow

Pressure

High Pressure

Certification

ISO

Dimension

0.4cbm

Power

0.75-4kw

Capacity

3.25m3/Min-8.94m3/Min

Rpm

1100-1950

Certificate

ISO9001

Working Temperture

20-200°C

Hscode

8414599040

Voltage

220V, 380V, 400V, 415V

Noise

<85dba

OEM

Yes

Phase

3 Phase

Model

Wsr100mj

Frequency

50 Hz

Bearing

NSK/Customized

Leadtime

5-7 Days

Transport Package

Wooden Box

Specification

245kg

Trademark

WSR

Origin

China

HS Code

84145990

Key features

100% Pre-shipment Testing: Every unit undergoes rigorous testing for airflow, pressure, vibration, noise, and temperature rise.

Continuous Operation Capability: Designed for 24/7 stable operation in demanding industrial environments like wastewater treatment.

Oil-Free Air Delivery: Lubrication is sealed in bearing chambers, ensuring clean air for sensitive applications.

ISO 9001 Certified Quality: Manufactured with strict quality control systems ensuring high precision and consistency.

Customized Bearing Options: Equipped with NSK bearings or other high-quality brands based on customer requirements.

Fast Standard Delivery: Standard models available for immediate shipment with a lead time of 5-7 working days.

Comprehensive OEM/ODM Services: Flexible customization available for airflow, pressure, dimensions, and installation requirements.

Advanced CNC Manufacturing: Utilizes modern CNC machining centers for high precision rotor synchronization and durability.

Company profile

High Repeat Buyers ChoiceRaw-Materials Traceability100% Finished Products InspectionManagement Certification

Shandong Zhaner Machinery Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 6 years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤0.75h

AI-Powered supplier vetting

SummaryThe supplier is a combined company focused on blower, environmental-protection equipment, and gas or liquid separation and purification equipment, with related manufacturing, repair, and parts-processing activities. It demonstrates broad customization, ODM and OEM services, recent product development, documented R&D processes, CAD capability, and 20 R&D patents. Production data shows annual output for four blower product categories, while lead times are stated as within 15 working days in both peak and off-season periods. Overseas services include installation, debugging, repair, maintenance, and training, with Indonesia identified as an overseas service market. The supplier reports some brand OEM experience but no Fortune 500 cooperation. Certification details are insufficient, and its supplier-service assessment process lacks written procedures or followed records. Financial information only identifies years 2021–2023, without sufficient evidence to assess financial credibility.

Supplier typeThe supplier is identified as a combined company rather than an offshore company. Its stated scope covers fan and blower manufacturing and sales, environmental-protection equipment, gas compression machinery, liquid separation and purification equipment, general and special equipment manufacturing and repair, and mechanical parts processing and sales.

After-Sales capabilityThe supplier offers overseas debugging, repair, maintenance, training, and equipment installation, and identifies Indonesia as an overseas service market. However, its service-capability assessment has no written procedures or followed records, and only some approved-supplier names were provided, indicating service offerings are evidenced but service governance is incompletely documented.

R&D capabilityThe supplier reports new products during the past year, ODM services, two R&D engineers, CAD capability, 20 R&D patents, and documented design-input, output, review, verification, and validation records available for audit. It also reports no available SDK, which limits the evidenced software-development capability, but the overall product R&D evidence supports a positive assessment.

Production capacityReported annual output includes 10,000 rotary vane blowers, 2,000 air-bearing turbo blowers, 500 magnetic-bearing turbo blowers, and 10,000 Roots blowers. The supplier also states lead times within 15 working days in both peak and off-season periods and has uniformly followed finished-product inspection instructions, providing explicit evidence of production capacity and operational control.

Customization capabilityThe supplier explicitly offers customization from samples, full customization, customization from designs, flexible customization, and minor customization. It also provides ODM services, indicating broad product-design and adaptation support.

Product Q&A

Q:What is a Roots blower mainly used for?

A Roots blower is mainly used for continuous air supply applications such as wastewater treatment aeration, pneumatic conveying, aquaculture oxygen supply, cement silo aeration, and various industrial air conveying systems where stable airflow is required.

Q:What is a Roots blower?

A Roots blower, also known as a Roots type air blower, is a positive displacement blower that delivers a fixed volume of air regardless of system pressure changes.

Q:What is the difference between a Roots blower and a centrifugal blower?

A Roots blower provides constant airflow independent of pressure, while a centrifugal blower's airflow varies with pressure. Roots blowers are more suitable for stable-flow, low to medium pressure applications.

Q:Is a Roots blower suitable for wastewater treatment plants?

Yes. Roots blowers are widely used as aeration blowers in wastewater treatment plants due to their stable airflow, reliable performance, and ability to operate continuously.

Q:Can a Roots blower operate continuously?

Yes. Roots blowers are designed for 24/7 continuous operation when properly installed and maintained.