Darley’s James Long Retires
Darley employees often talk about the importance of people. Strategies evolve, markets change, and technologies advance, but it is dedicated individuals who build a company's culture, strengthen its capabilities, and help shape its future. This year, the company...
The Principle of Latent Heat
In the first article on apparatus HVAC systems, I mentioned that latent heat disappears. Disappearing does not mean that the heat ceases to exist. It simply means that we cannot measure it through our normal means—a thermometer. As mentioned in that article, I write...
Inside Darley: September/October 2026 Edition
https://youtu.be/rmlUG2iM-cY?si=kX3tPBnzLhr_Cglq Among other topics, this month's Inside Darley includes information from some of Darley's other divisions. This includes Pump Modules, which have really been a growing area for the company as fire truck builders have...
After-Hours Emergency Repairs and Managing a Reserve Fleet During Peak Demand
By Mike Huber In today’s fire service environment, apparatus availability is more critical than ever. Fire departments rely on increasingly complex fleets made up of engines, ladder trucks, medic units, tankers, and specialty apparatus that must remain operational...
ARTICLES
After-Hours Emergency Repairs and Managing a Reserve Fleet During Peak Demand
Apparatus failures do not wait for normal business hours. When these situations occur, fleet personnel must make rapid decisions that balance operational readiness, staffing limitations, and safety.
HVAC Systems: So, What Is a Micron, Part 2
Do you need a micron gauge? That is an economic decision, but if you are conscientious as well as under time constraints, you may find that a micron gauge saves time by avoiding either over pumping to be on the safe side or just hoping that you get enough of the air out.
Rig Review: Logan Township (NJ) Engine 18
Engine 18 is this 2025 E-ONE Typhoon stainless-steel pumper. It has a Typhoon 58-inch cab with flat roof and 4-inch lower steps.
Department Adds Two Commercial-Chassis Tankers
The department had applied for an AFG grant for the apparatus purchase but had been turned down several times before finally being awarded the grant. Just prior to being awarded, the township was ready to provide funding for the apparatus.
PRESS RELEASES
Denver (CO) Fire Department Orders Three Spartan Emergency Response S-180 Custom Pumpers
The Denver Fire Department is adding Spartan custom pumpers to update its fleet and to accommodate continued growth in the city.
Darley Welcomes General Joseph Votel to Board of Directors
General Votel brings a distinguished record of military leadership, strategic expertise, and a lifelong commitment to serving the nation’s warfighters.
Darley Releases New Uncrewed Systems Capabilities and Partner Brochure
This brochure showcases Darley’s integrated approach to uncrewed technologies, highlighting platforms, components, and support solutions that enhance operational effectiveness across air, land, and maritime domains.
Darley Welcomes Jim Johnson to Board of Directors
Johnson’s appointment reflects Darley’s ongoing commitment to building on the strength of its board of directors with experienced industry leaders who provide strategic guidance and oversight.
APPARATUS GALLERY
VIDEOS
Inside Darley: March/April 2026
Spring is here and that means it’s time for the spring/summer issue of the Darley Times newsletter, which features an article on new president Lee Wise, and more.
Inside Darley: January/February 2026
Darley starts the new year with a new five-year strategic plan called “3B30.” That’s a goal to be a $3 billion business by the year 2030.
Inside Darley: November/December 2025
In this edition, Paul Darley discusses the company’s growth with the U.S. Department of Defense. The company is also engaged in wildfire management, leadership development, and more.
Inside Darley: September/October 2025
Paul Darley discusses the success of the company’s internship program and offers tips for family businesses to continue family ownership generation after generation.
Inside Darley: July/August 2025
Paul Darley and more than 300 employees and their families enjoyed a weekend in the Wisconsin Dells to celebrate hitting a billion dollars in revenue. Deloitte presented Darley with the Best Managed Company award, one of 60 companies in the U.S. to received it.
Inside Darley: May/June 2025
Explore highlights from Darley’s May-June issue of Inside Darley, including record attendance at FDIC, new catalogs, and upcoming events like NDIA and the IL Fire Service Home Day.
LATEST
Denver (CO) Fire Department Orders Three Spartan Emergency Response S-180 Custom Pumpers
The Denver Fire Department is adding Spartan custom pumpers to update its fleet and to accommodate continued growth in the city.
Darley’s James Long Retires
As president of the Defense Division and a member of Darley’s executive leadership team, James has played a pivotal role in helping build Darley into the organization it is today.
Darley Named No. 2026 on the 2026 Inc. 5000 List
Among the 5,000 companies on the list, the median three-year revenue growth rate was 130%, and those companies have collectively added more than 627,208 jobs to the U.S. economy over the past three years.
The Principle of Latent Heat
Latent heat disappears, but that heat does not cease to exist, just that we cannot measure it with a thermometer. Understand how making use of latent heat is what makes an HVAC system efficient.
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RIGS
Denver (CO) Fire Department Orders Three Spartan Emergency Response S-180 Custom Pumpers
The Principle of Latent Heat
E-ONE Select Series Aerial in Service for KY Department
Equipment
Inside Darley: September/October 2026 Edition
Pump modules have been a growing area for the company as fire truck builders have long backlogs coming in. Darley has been able to help fill those needs.
Just Ask Engineering: What Makes a Part Reusable or Not?
When rebuilding a pump, deciding what to replace versus reuse is a common question. Fortunately, the process is straightforward: break the pump into individual components and evaluate each piece one at a time.
EV Tech Talk: What Happens When You Shift Out of Road Mode Into Pump Mode?
Fire department training divisions should include some input from the mechanical division. As a mechanic, I can’t teach someone the proper way to put out a fire. I’m not trained for that. In the same breath, firefighters aren’t expected to know how the equipment they use works mechanically. Although firefighters don’t need to understand how to fix the equipment, a general understanding of how something works affects how they use it.
Pump Packing vs. Mechanical Seal
In this article, we are going to discuss what packing and a mechanical seal are. But first we need to know what the purpose of these “seals” is in our pumping systems. To put it very simply, they keep the oil and water separated.
