Ask An Expert

How to Choose Between a Drop-Through vs. Blow-Through Rotary Valve

Side By Side Of Blow Through And Drop Through Rotary Valves

When selecting a rotary valve for your pneumatic conveying systems, there are many design options to consider such as size, materials of construction, and compliance to industry standards. Among these choices, one important factor that stands out is configuration.

When selecting a rotary valve to feed a pneumatic conveying line there are generally two types of configurations: drop-through and blow-through, sometimes called “blowing seal.” But how do you determine which one is best suited to feed your product through your pneumatic conveyor?

Rotary Valve Maintenance: How to Prevent Downtime in 7 Easy Steps

Rotary Valve Maintenance TipsWhile rotary valves may seem like very simple machines, they are essential for controlling the flow of powder through pneumatic conveying systems. Rotary valves need to be in premium condition to keep the system operating safely and smoothly. And should you encounter a problem with your rotary airlock feeder, the system must be halted to perform repairs, taking significant time and expense.

However, with proper and regular rotary valve maintenance, you can avoid these costly repairs and downtime. This not only results in smoother conveying operations, but also better valve performance.

4 System Must-Haves for Protecting Against Dust Explosions

Powder Processing Plant Worker Handles Dry Powder

Dust explosions are an ever-present risk for all bulk powder processors and handlers, threatening the safety of your workers and your bottom line. So how can a plant protect against dust explosions?

There are safety measures, such as controlling ignition sources or performing regular and thorough cleaning, that powder processing plants can take to limit the potential of a dust explosion as well as collect and eliminate dangerous combustible dusts.

To Rebuild or Replace – That is the Question

Is Your Rotary Valve or Airlock On It’s Way Out? Rotary Valve Rebuilding May Be an Option

Dear Powder Doctor,

Our rotary valve is in need of replacement. We’re aware that a new rotary valve is quite expensive. Do you have recommendations for finding a cost-effective replacement?

Roe T’Val

Dust Explosions: 7 of the Most Vulnerable Powder Processors and Manufacturers

Shell Corn Being Dumped at a Grain Elevator


When it comes to protecting plant and employee safety, many powder processors are focused on mitigating the buildup of combustible dusts as they can lead to costly and even deadly dust explosions.

In fact, 14 people were killed and 38 others were injured in a single, tragic dust explosion at Imperial Sugar Company in Port Wentworth, Georgia in 2008. Furthermore, the Center for Public Integrity analyzed data from the Occupational Safety and Health Administration (OSHA) back in 2012 and reported that 130 workers have lost their lives and 800 more have been injured in hundreds of combustible dust accidents since 1980.

How to Select a Rotary Airlock/Feeder Valve for Your Powder Processing Needs

Stainless Steel Premium Rotary ValveFor bulk powder processing plants, rotary valves — also known as rotary airlocks, rotary feeders, and countless other variations — control the flow of powder into and out of many critical points within the plant. Beyond controlling the flow of powder, rotary valves can be vital for safety as they often act as a flame barrier and process isolator in the event of a dangerous dust explosion.

8 Proven Safety Measures to Prevent Dust Explosions

Factory Worker Holding a Pile of Combustible Dust

A dust explosion at a plant can have catastrophic consequences for many powder processors, including loss of life. In fact, according to an analysis of data from the Occupational Safety and Health Administration (OSHA) by the Center for Public Integrity back in 2012, there have been 450 dust explosions since 1980 in the US alone causing the deaths of nearly 130 workers and the injury of over 800.

4 Industries Made Safer, More Sanitary & More Efficient by BFM® Fittings

Snapping in BFM fittingFor bulk powder processing plants, there’s always an emphasis placed on ensuring the highest standards of sanitation, safety and efficiency. But there are points in the production process where dust exposure can compromise each of these three powder processing pillars. Dust can lead to production contamination, require extensive cleaning, and increase the risk of dust explosions.

5 Food & Beverage Applications Perfect for Screw Conveyors

A Screw Conveyor HelixFor food and beverage companies working with powdered ingredients, moving materials throughout the production process needs to be an effortless task to keep production running smoothly and on-time. To accomplish this, many processors turn to screw conveyors.

What is a screw conveyor?

4 Types of Powders Fit for Vibrating Conveyors

Dairy Powder is Processed with a Vibrating ConveyorEvery powder processor has a unique production process, often requiring specific types of equipment to efficiently, safely and sanitarily transport powder materials from start to finish.

For those processors handling fine types of powder material, delicacy is important to limit degradation that could impact quality of the final product. In these cases, vibrating conveyors are typically the type of mechanical conveyors processors choose.