Articles for NFPA
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Apr 07, 2025 by Brittany Dollimore
Why keep spare valve parts on the shelf?
Stock extra rotary airlock valve parts on the shelf to reduce downtime, protect other important components, and keep your facility safe.
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Feb 19, 2025 by Megan Thompson
What’s new in the NFPA 660 combustible dust standard?
NFPA 660: Standard for Combustible Dusts and Particulate Solids (2025) is now in effect. Find out what the changes mean for your processing plant.
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Sep 09, 2024 by Megan Thompson
Is my rotary valve NFPA compliant?
Learn the requirements for an NFPA compliant rotary airlock valve and find out why compliance is so important.
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Jun 20, 2024 by ACS Valves
6 ways to save time on rotary valve maintenance
Maintenance is non-negotiable, but it doesn’t have to cost hours of downtime. See our best tips for saving time on rotary airlock valve inspections, cleaning, and maintenance.
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Apr 15, 2024 by Paul Bowman
How to: Check rotor-to-housing tolerances
Keep your rotary airlock valve compliant with NFPA guidelines and maintain strong performance by checking your rotor-to-housing clearances regularly.
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Aug 10, 2023 by Greg Thompson
Protect your product: How outboard bearings keep valves safe
Why do we recommend outboard versus inboard bearings for rotary valves? It’s all about protecting your investments and your plant.
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Jul 11, 2023 by Paul Bowman
How are rotary valves tested for safety?
To set you up for success, the ACS Valves team puts rotary airlock valves through some really rigorous tests.
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Apr 14, 2023 by Megan Thompson
Quiz: What do you know about deflagrations?
Deflagrations are a type of subsonic combustion, and they can pose a hazard to your processing facility. What do you know about them?
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Feb 09, 2023 by Megan Thompson
Airlocks for dust collection systems: The basics
Everything you need to know about rotary airlock valves for dust collector applications
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Jun 20, 2022 by Megan Thompson
Quiz: Workplace safety statistics to know
See if you can guess these key stats from OSHA, NFPA, and other workplace safety organizations
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Apr 22, 2022 by Megan Thompson
What is an NFPA compliant valve?
Find out if your rotary airlock valve is configured for optimal safety and NFPA compliance
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Aug 18, 2021 by Megan Thompson
Choosing a rotary valve: 3 more things to consider
Find out how energy efficiency, NFPA safety and maintenance cycles impact your choice of rotary airlock valve
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Jun 10, 2021 by Megan Thompson
Why should I keep a historical maintenance log?
Tracking maintenance helps you protect workers, keep equipment in good condition, and comply with NFPA regulations
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May 07, 2021 by Greg Thompson
Check out the Multi-Port Valve, our latest invention
This one-of-a-kind rotary valve features multiple compartments for added efficiency in high-volume applications
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Sep 18, 2020 by Megan Thompson
I missed the DHA deadline! What happens now?
The deadline for dust hazard analyses (DHAs) has passed, but you can still take steps to stay compliant with NFPA 652
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May 20, 2020 by Megan Thompson
Why we recommend ACST-4 shaft seals for valves
Shaft seals are some of the fastest rotary valve parts to wear out. We’ll tell you which seal type has the most longevity and why
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Apr 21, 2020 by Megan Thompson
Quiz: What do you know about DHAs?
Industrial facilities need to conduct Dust Hazard Analyses (DHAs) by September 7, 2020. What do you know about the process?
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Feb 17, 2020 by Paul Bowman
Are rotary airlocks supposed to leak?
The answer is yes… and no. Airlocks aren’t infallible, but there are ways to minimize leaks and keep air flow consistent
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Feb 13, 2020 by Megan Thompson
Need a rotary valve safety guide?
We published some comprehensive rotary valve safety guidelines in Powder & Bulk Solids
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Jan 14, 2020 by Paul Bowman
Yes, you actually do need to check your rotor clearances
Measure your valve’s rotor-to-housing tolerances regularly to stay NFPA compliant and maximize material flow
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Apr 24, 2019 by Megan Thompson
Pop Quiz: NFPA Valve Compliance, Part 2
Here’s another test of your NFPA rotary valve knowledge. Are you ready?
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Feb 21, 2019 by Paul Bowman
Flex or fixed? The difference between two rotor tip types
Find out which rotor tip type is right for your process
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Jan 14, 2019 by Megan Thompson
Why choose a valve on rails?
Valves on rail systems deliver better ROI in several applications
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May 22, 2018 by Megan Thompson
The ABCs of NFPA Valve Compliance
Key terms for your education on NFPA safety
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Apr 24, 2018 by Megan Thompson
NFPA guidelines: Replacing your uncompliant parts
Stay safe and compliant with these rotary valve replacement tips
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Feb 20, 2018 by ACS Valves
Pop Quiz: NFPA Valve Compliance
How well do you know the NFPA rules as they relate to rotary valves?
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Oct 04, 2017 by Megan Thompson
OSHA is sweeping combustible dust under the rug
Preventing dust explosions should be at the top of your agenda when planning plant safety, and we have the low-down on how to do just that.
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Apr 25, 2017 by Nena Dallas
How to increase the life expectancy of your machinery
That rickety old valve has broken down again, and you're tired of replacing it all the time. Here are some tips on how to ensure your valves last longer and give you less downtime.
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Jan 03, 2017 by Greg Thompson
How to use the same machinery for any material type
Replace your one-trick pony rotary valve with one that does it all
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Jun 24, 2016 by Megan Thompson
Everything you need to know about NFPA 652
The NFPA has a new standard for combustible dust across all commodity-specific manufacturing industries worldwide. Find out what the standard includes and how to make your plant compliant.
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May 25, 2016 by Megan Thompson
What you need to know about isolation devices
An explosion in your machinery doesn't have to lead to a plant-wide disaster. Read about ways to reduce the spread of flames with properly designed isolation devices and rotary airlock valves.
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Apr 28, 2016 by ACS Valves
NFPA Safety: It's Not Just About the Airlock
On-demand one hour webinar on NFPA Safety.
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Feb 26, 2016 by Megan Thompson
ACS deconstructs deflagration
Understanding the dangers of deflagration can help you better prevent plant fires and explosions.
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Jun 02, 2015 by ACS Valves
Q&A with ACS
You asked. We answered.
Our live webinar on May 14, Understanding Airlocks, concluded with a lively Q&A session. In case you missed it, here are the questions you asked, along with our answers.