Blackmer Launches Behind-the-Rotor Seal for G Series Internal Gear Pumps

Blackmer, part of Dover’s PSG segment, introduces a behind-the-rotor seal to improve durability and serviceability of G Series internal gear pumps.

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Dover (DOV), through its PSG business Blackmer, has introduced a new behind-the-rotor seal design for Blackmer G Series Internal Gear Pumps.

The seal is engineered to keep process fluids and abrasive materials away from drive components, which the company said reduces wear, simplifies maintenance and increases uptime. It is offered in Type 1 and Type 8 configurations, supports the use of a lower-cost bronze bushing when pumping abrasive media, and is initially available on G3-2 through G3-69 cast iron models, with additional material options planned.

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DOWNERS GROVE, Ill., Sept. 9, 2026 /PRNewswire/ -- Blackmer, part of PSG, a Dover (NYSE: DOV) company, and a global leader in rotating pumps and reciprocating compressor technologies, today announced the launch of a behind-the-rotor seal for its Blackmer^® G Series Internal Gear Pumps. The new seal design delivers improved protection and performance when handling abrasive materials, helping extend the life of the pump across a range of applications.

Engineered for serviceability and longevity, the behind-the-rotor seal prevents process fluids and abrasive materials from contacting drive components of the G Series, resulting in reduced wear, simplified maintenance and increased uptime for operators.

"The introduction of the behind-the-rotor seal reflects our ongoing commitment to providing reliable pump technology and enhances the trusted performance of the G Series," said Joe Parzych, Product Manager of Blackmer. "By protecting critical internal components, this new seal helps customers minimize downtime and reduce total cost of ownership."

The behind-the-rotor seal includes the following key features:

• Available in Type 1 or Type 8 seal configurations for greater flexibility.
• Supports the use of a lower-cost bronze bushing when pumping abrasive materials.
• Ideal for industries handling starches, inks, pulp, resins and adhesives.
• Offered on G3-2 through G3-69 cast iron models, with additional materials planned for future release.

For more information on Blackmer, please go to blackmer.com. For more information on PSG, please go to psgdover.com.

About Blackmer:

Blackmer^® is the leading global provider of innovative and high-quality positive displacement, regenerative turbine and centrifugal pump, and reciprocating compressor technologies for the transfer of liquids and gasses. For more than a century, the Blackmer name has stood for unparalleled product performance, superior services and support, well-timed innovation and a commitment to total customer satisfaction. Supported by a worldwide network of distributors and original equipment manufacturers, Blackmer pumps and compressors are used in a multitude of applications in the Process, Energy and Military & Marine markets. Blackmer, headquartered in Grand Rapids, Michigan, USA, is part of PSG, a Dover company. For more information on Blackmer, please go to blackmer.com.

About PSG:

PSG is the global pump, metering and dispensing-solution expert, enabling the safe and efficient transfer of critical and valuable fluids that require optimal performance and reliability in applications where it matters most. Additionally, PSG is a leading provider of flow meters designed to reduce waste and downtime while accurately measuring, monitoring and controlling the distribution of fluids. Headquartered in Downers Grove, IL, USA, PSG is comprised of several world-class brands, including Abaque, All-Flo, Almatec, Blackmer, CPC Biotech, Ebsray, em-tec, Griswold, Hydro, ipp, Malema, Mouvex, Neptune, Quantex and Wilden. PSG products are manufactured on three continents – North America, Europe and Asia – in state-of-the-art facilities that practice lean manufacturing and are ISO-certified. PSG is part of the Pumps & Process Solutions segment of Dover Corporation. For additional information on PSG, please visit psgdover.com. PSG: Where Innovation Flows.

About Dover:

Dover is a diversified global manufacturer and solutions provider with annual revenue of over $8 billion. We deliver innovative equipment and components, consumable supplies, aftermarket parts, software and digital solutions, and support services through five operating segments: Engineered Products, Clean Energy & Fueling, Imaging & Identification, Pumps & Process Solutions and Climate & Sustainability Technologies. Dover combines global scale with operational agility to lead the markets we serve. Recognized for our entrepreneurial approach for over 70 years, our team of approximately 24,000 employees takes an ownership mindset, collaborating with customers to redefine what's possible. Headquartered in Downers Grove, Illinois, Dover trades on the New York Stock Exchange under "DOV." Additional information is available at dovercorporation.com.   

PSG Contact:
Christopher Walsh
(331) 277-8137
christopher.walsh@psgdover.com

Dover Media Contact:
Adrian Sakowicz, VP, Communications
(630) 743-5039
asakowicz@dovercorp.com      

Dover Investor Contact:
Jack Dickens, VP, Investor Relations
(630) 743-2566
jdickens@dovercorp.com

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SOURCE Dover

FAQ

What are the key technical features of Blackmer's behind-the-rotor seal?

The behind-the-rotor seal is available in Type 1 and Type 8 configurations, helps prevent process fluids and abrasive materials from contacting drive components, and supports use of a lower-cost bronze bushing when handling abrasive materials.

For which Blackmer G Series pump models is the new seal initially offered?

The behind-the-rotor seal is offered on G3-2 through G3-69 cast iron G Series Internal Gear Pump models, with additional materials planned for future release.

Which applications does Blackmer identify as suitable for this new seal design?

The seal is described as ideal for industries that handle starches, inks, pulp, resins and adhesives, where abrasive or challenging fluids can affect pump internals.