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Positive Displacement Blowers

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Our innovative positive displacement blowers (PD blowers) are state-of-the-art and best suited to maximize productivity and minimize energy costs for environmental applications such as municipal wastewater treatment. 

At Hoffman and Lamson, we not only deliver advanced technology but also provide local service capability to ensure our products are backed by reliable technical support. When it comes to positive displacement blowers, trust in our expertise and experience to enhance your operations. Explore the unmatched performance of the HOFFMAN DEFENDER™ Series by clicking the product cards below. 

HOFFMAN DEFENDER Lobe

Rotary Lobe Positive Displacement Blowers

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HOFFMAN DEFENDER Screw

Screw Positive Displacement Blowers

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The HOFFMAN DEFENDER™ Series of Positive Displacement Blowers

Hoffman's positive displacement blowers (PD blowers) are part of an integrated package that is designed to convey gas at low pressure. The PD blowers in the HOFFMAN DEFENDER™ Series are based on a positive displacement rotary air blower powered by an electric motor through a reliable belt drive system. Our integrated packages come complete with all necessary accessories and a noise enclosure, ensuring optimal performance and minimal disruption. 

The HOFFMAN DEFENDER™ Series includes PD Lobe and PD Screw blower packages that offer reliability, sturdiness, and compactness. In today's competitive global market, our extensive experience in providing customized blower solutions tailored to our customer's unique needs sets us apart. Utilizing modern machining systems and state-of-the-art production processes, our product range continually evolves to meet industry demands.

Positive displacement blowers and packages by Hoffman and Lamson
Positive Displacement Blower Packages

Lobe PD Blower | The DEFENDER™ Series

HOFFMAN Rotary Lobe positive displacement blower packages convey a relatively constant volume of gas from the inlet to the discharge point. It follows the isochoric compression principle also known as external compression. 

In this medium like gas or air is forced from an atmospheric condition into a system with a given resistance, such as back pressure to achieve the relevant pressure increase. For this reason, Rotary Lobe PD blowers are not considered compressors. The amount of gas the machine handles is fixed by the configuration of its casing and rotating parts. 

Our Lobe PD blower has a capacity of up to 6,121 cfm to meet the various needs of our customers and their range of municipal wastewater applications. This is an excellent solution for the oil-free conveyance of air and neutral gases. It is equipped with a low-pulse system that reduces the residual pressure pulsation of the conveyed gas.

 

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HOFFMAN DEFENDER Lobe Positive Displacement Blower
Lobe PD Blower

Screw PD Blower | The DEFENDER™ Series

Our Screw PD blower packages have rotors that turn in opposite directions to maintain precise alignment by means of timing. When the rotors mesh, they form a series of working chambers between the rotors and the casing wall. 

The gas is sucked from the intake side and trapped between the rotors and the casing and the cover. Then, it is transported to the compression side, or discharge, where the working chamber shrinks and the air or gas is compressed. The internal compression leads to a supply of steady, non-pulsating air flow. This minimizes vibration and maintenance; thus, maximizing the PD blower's lifespan. 

HOFFMAN DEFENDER Screw Positive Displacement Blower
Screw PD Blower

The DEFENDER™ Screw PD blower has a capacity of up to 6,180 cfm to meet the needs of our customers and their wide range of municipal wastewater treatment applications. 

In wastewater treatment plants, energy consumption accounts for over 50% of annual costs. The DEFENDER™ Screw blower range meets all cost reduction requirements, allowing customers to save between 15% and 30% on energy consumption when compared with other technologies.

 

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PD Blowers | The Ideal Solution for Municipal Wastewater Treatment 

With flexible configurations and enhanced technical features, the positive displacement blower packages in The HOFFMAN DEFENDER™ Series are the perfect solution for a broad range of environmental applications like municipal wastewater treatment including: 

  • Aeration Process
  • Aerobic Activated Sludge Systems 
  • Backwashing Sand Filtration
  • Desalination
  • Nitrification-Dentrification
  • Primary Sedimentation
  • Sequencing Batch Reactors (SBR)
  • Silent Membrane Systems (MBR)

As the wastewater center of excellence, we have delivered robust, reliable, and efficient solutions for over 150 years.

 

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H&L WWT Energy Audits

Industry-Trusted Positive Displacement Blower Packages | Hoffman and Lamson

The HOFFMAN DEFENDER™ PD Blower Lobe and Screw packages are innovatively designed to operate as follows:

  • Efficient thanks to patented rotors, which reduce the number of revolutions and enhance the capacity-pressure ratio
  • Silent as a result of high-efficiency internal compression, silencers, and a noise-reducing enclosure
  • Simple installation and configuration 
  • Flexible to ensure efficient operation 
  • Ease of Maintenance thanks to its simple and robust construction   

For more than a century, our customers have relied on the superior performance of our positive displacement blowers. Our extensive blower portfolio stands as a testament to our commitment to quality and innovation.

Each piece of equipment undergoes rigorous testing before reaching our customers or end-users, guaranteeing top-notch quality and preventing any potential issues or operational disruptions. This dedication to quality assurance has solidified Hoffman & Lamson's position as the leading global provider of engineered solutions. We take pride in delivering high-quality products efficiently and cost-effectively, making us the trusted choice in the industry.

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Water and Wastewater Treatment

WATER & WASTEWATER TREATMENT

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

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Aeration in Wastewater Treatment

Aeration In Wastewater Treatment

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ABOUT Hoffman™ and Lamson™

Hoffman™ and Lamson™ brands of centrifugal blowers and exhausters are among the many compressed air and gas technologies manufactured by Gardner Denver Inc.

Part of the Nash Division, they are American originals. Hoffman™ and Lamson™ brands have been setting industry standards for excellence, reliability, and customer satisfaction for over 100 years. Lamson, established in 1880, and Hoffman, in 1905, are brands customers know and continue to trust.

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