HFlogo.png
HFlogo.png
HOFFMAN DEFENDER Lobe and Screw PD Blowers

Positive Displacement Blower Technology For Energy Savings

Reach Out to Us

Got a question or need assistance? Reach out using one of the options below to get in touch, request a service, or ask for a quote.
Contact UsRequest a QuoteRequest Service, Parts or Support
HOFFMAN & LAMSON’s Positive Displacement Blower Technology delivers reliable, energy-efficient solutions for demanding industrial and environmental applications. Our PD blowers, including rotary lobe and screw models, are engineered to provide consistent airflow with minimal energy consumption. The HOFFMAN DEFENDER™ Series is trusted worldwide for wastewater treatment, aeration, and gas conveyance. With advanced rotor designs and internal compression systems, our blowers reduce operational costs while maximizing uptime. Whether you're optimizing municipal infrastructure or industrial processes, our PD blower packages offer unmatched performance and durability. Discover why Hoffman & Lamson is the global leader in positive displacement blower technology.What Are Positive Displacement Blowers?

A positive displacement blower, also known as PD blower or rotary air blower, operates by trapping a specific volume of air or gas in a chamber and then displacing it by using rotating elements such as lobes or screws. Positive displacement blowers are designed for applications that require consistent and reliable airflow at varying pressures. 

Positive displacement blowers are designed for high-efficiency, they often feature low energy consumption and reduced operational costs. Constructed with robust materials, PD blowers are an ideal solution for demanding industrial environments such as Wastewater Treatment. 

The HOFFMAN DEFENDER series of positive displacement Lobe and Screw blower packages means reliability, extreme sturdiness, and compactness. In a competitive global market, our long history of supplying blower solutions to suit our customers' unique requirements sets us apart from the rest. Using modern machining systems and state-of-the-art production processes, our product range is constantly evolving. We offer local service capability, ensuring our advanced technology is backed by technical support.

Positive displacement blowers and packages by Hoffman and Lamson
screw_360x360.jpg

Rotary Screw Blower | PD Blowers | Hoffman & Lamson

Hoffman and Lamson’s rotary screw blower packages offer flexible configurations and enhanced technical features. Screw blower packages are an ideal solution for environmental applications like municipal wastewater treatment.

Positive Displacement Blower Features | DEFENDER™ Series

Positive displacement blowers offer several features and benefits that make them suitable solutions for a wide range of industrial applications. Positive displacement blowers can carry out the toughest tasks with consistent quality and reliability. They provide convenient, reliable solutions that deliver optimal performance and maximum uptime. Some key features of the Hoffman DEFENDER™ Series of positive displacement blowers include:

  • High-Efficiency with patented rotors that reduce the number of revolutions and enhance the capacity pressure ratio.
  •  Quiet Operation as a result of high-efficiency internal compression, silencers, and a noise-reducing enclosure.
  • Simple installation and configuration.
  • Flexible to ensure operation at the point of the best efficiency.
  • Ease of Maintenance thanks to its simple and robust construction

HOFFMAN DEFENDER™ Lobe Blower

Our DEFENDER™ rotary lobe blower range has been redeveloped in line with our customers’ exacting requirements and is suitable with environmental conditions between 104° F to -13° F (40° C to -25° C).

HOFFMAN DEFENDER Lobe Positive Displacement Blower

Learn About Our Lobe PD Blower

HOFFMAN DEFENDER™ Screw Blower

Rotary screw positive displacement blowers are uniquely designed. The specialized capabilities of the new screw units create exciting economic opportunities, and various applications around the world are confirming very impressive results.

Screw blowers are volumetric. This means it simply moves the air. It is not a kinetic-energy or dynamic machine, so it does not have to convert different types of energies. A plant’s variable working pressure is easy to handle with volumetric screw technology.

HOFFMAN DEFENDER Screw Positive Displacement Blower

Learn About Our Screw PD Blower

What Are Positive Displacement Blowers Used For?

Positive displacement blowers are used in various applications across different industries due to their flexibility and ability to provide a constant and reliable flow of air or gas. Common uses include wastewater treatment, pneumatic conveying, power generation, and chemical and pharmaceutical applications. 

wwt-industry-icon.png

WATER & WASTEWATER TREATMENT

As experts in aeration blower technology, we offer solutions for Wastewater Aeration, Filter Backwash, Digester Gas, and Grit Chamber Aeration.
Aerated-Grit-Chamber-App-Image_web.jpg

Aerated Grit Chambers

HOFFMAN & LAMSON blowers are custom made & designed to provide specific airflow & pressure to wastewater treatment applications.
Aeration-In-Wastewater-Treatment.png

Aeration In Wastewater Treatment

Learn why blowers are the preferred technology for wastewater aeration due to quiet operation, constant pressure systems with varying flows.
Filter-Backwash-App-Image_WEB.jpg

Filter Backwash

Hoffman & Lamson engineered products ensure reliable quality and cost-effective solutions for water and wastewater applications.
sludgeprocessingtitleimagewebjpg (1).jpg

Gas Boosting In Anaerobic Digestion

Multistage centrifugal blowers are used to move the gas from the digester to further treatment processes for the application.
MBR-App-Image_WEB.jpg

Membrane Bioreactors

Hoffman & Lamson products used in membrane bioreactor processes produce effluent to be discharged to waterways and used for irrigation.
SBR-App-Image_WEB.jpg

Sequencing Batch Reactors

Our blowers deliver quality, reliability, value, and performance to serve wastewater applications like sequencing batch reactors.
Sludge-Incineration-App-Image_WEB.jpg

Sewage Sludge Incineration

Our blowers are efficient and the preferred technology for wastewater applications like sewage sludge incineration.

Choosing Hoffman & Lamson Positive Displacement Blowers and Other Industrial Blower Solutions 

As a world leader in blowers and exhausters for different industries, Hoffman & Lamson are committed to playing a vital role by saving energy and protecting the environment. Our team of highly skilled and experienced engineers are focused on developing products that offer maximum benefits to our customers. Our equipment, systems, and services are dedicated to helping customers optimize performance.