Positive Displacement Blowers

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 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 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. 

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: 

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.