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Dust Collection and Valves Blog

Dust Collection Systems: 5 Best Solutions of Dust Collection Airlocks

Posted by Tom Hobson on Apr 24, 2017 8:30:00 AM

When you are specifying your dust collector, don’t just settle on a rotary valve.  There are other airlocks that might be better suited for your application.  Other airlocks include the double dump (flap) valve, trickle valve, and knife gate.  Not to mention just bypassing an airlock totally and connecting a hopper directly to the bottom of the dust collector.

Dr Dust Evaluation

The following will help you figure out which is the best solution:

  1. Rotary valve – Use this if you have combustible dust. However, you will have constant air leakage across the valve.
  2. Double dump valve – Use this if you want to minimize air leakage. The Double Dump works great with big, chunky material or if you’re worried the material may wrap around a rotary valve rotor.
  3. Trickle valve – Use to save money and time. Requires a vacuum and usually a fine, free-flowing particle to work effectively.  It’s low cost and easy maintenance makes it very attractive when suitable.
  4. Knife Gates – Used for periodic emptying of the dust collector hopper into another container. Knife gates come in a variety of design (knife gate, slide gate, orifice type, etc.).  Depending on the design, they can provide an airtight seal or not.  However when open, the airlock is lost.
  5. Direct couple to a hopper – Used with low dust loading and could require the dust collector to be turned off during changing of the hopper. Also be-careful to take into account the lower hopper when used on a combustible dust application.

When you are looking for an airlock, don’t just automatically use a rotary valve.  Doing so may cause operational and maintenance issues in the future.  It could also cost you more money.  If you would like help in picking the best airlock, don’t hesitate to contact Dr. Dust at 440-543-7400 or dc@dustcollectorhq.com. He is available to help you to solve your dust collection issues.

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Topics: knife gate valve, rotary valves, double dump valve, trickle valve, direct couple to hopper

Dust Collection Systems: Rotary Valves and NFPA-69

Posted by Tom Hobson on Apr 10, 2017 8:30:00 AM

When you have a combustible dust, not only does your dust collector require to be protected against a deflagration, but the airlock must contain the event.  NFPA-69 allows the use of a rotary valve as long as the following:

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Topics: dust collector, rotary valves, NFPA-69, combustible dust, deflagration

Dust Collection Systems: Instrumentation 101 - Differential Pressure Gages

Posted by Tom Hobson on Mar 20, 2017 9:01:00 AM

A dust collection system is much more than just the dust collector (ex. Cyclone, baghouse, cartridge collector, wet scrubber, etc.).  It constitutes the exhaust fan, hoods, instrumentation and interconnecting ductwork.  If any of these components are improperly sized or operating, the whole system can fail in its primary objective, dust collection.

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Topics: dust, gpc, Pressure Gages, Sudden change in airflow

Dust Collection Systems: Fan Wheels 101

Posted by Tom Hobson on Mar 8, 2017 9:01:00 AM

A dust collection system is much more than just the dust collector (ex. Cyclone, baghouse, cartridge collector, wet scrubber, etc.).  It constitutes the exhaust fan, hoods, instrumentation and interconnecting ductwork.  If any of these components are improperly sized or operating, the whole system can fail in its primary objective, dust collection.

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Topics: dust, gpc, Fan Wheels, Fan Impellers

Case Study: Compact Cyclone Key Component in Tablet Dust Reclamation? GPC Helps Keep Pharmaceutical Process in Check with FDA

Posted by Tom Hobson on Feb 20, 2017 8:30:00 AM

Aerodyne Environmental, the industry’s leading manufacturer of industrial cyclonic dust collectors and dust collection valves, recently assisted in a pharmaceutical application. A prominent US pharmaceutical company was creating a dust collection system for the facility where a variety of drugs are manufactured. The company plans on using a cartridge collector as part of the tablet manufacturing process. Because this company is regulated by the FDA, every gram of product must be accounted for, even the dust. The active pharmaceutical ingredients (APIs) that are created are extremely fine and flow like water. The cartridge collector would be able to collect the particulate in the process, but much of it would get stuck in the filters and would be hard to account for. Read more about this case study.

 

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Topics: pharmaceutical, compact cyclone, tablet dust reclamation

Aerodyne Cyclones help with Pharmaceutical Product Reconciliation

Posted by Tom Hobson on Feb 7, 2017 9:00:00 AM

Do you need to provide product reconciliation or are you spending too much time gathering the product from your dust collector?

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Topics: pharmaceutical, EZBIBO, compact cyclone

Introducing the “EZBIBO” for Pharmaceutical Processes? A Beginner’s Guide to Easy Bag-In Bag-Out Hopper Waste Reclamation System!

Posted by Tom Hobson on Jan 23, 2017 8:15:00 AM

Slide3 - Copy.jpgThe “EZBIBO” system was originally designed for use with Aerodyne GPC Cyclones to allow for easier bag-in bag-out capture systems for low toxic level pharmaceutical dusts typically encountered with encapsulators, pill coating systems, and some mixing operations.  The system allows for capture and bagging of waste material in the pharmaceutical process allowing for weighing and accounting of all materials used in a process, with minimal exposure to operation personnel.

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Topics: cyclone, dust collector, gpc, Waste Reclamation System, pharmaceutical, EZBIBO, pill coating system

4 Potential Dangers to Collectors! How Cyclone Pre-Filters Can Help!

Posted by Tom Hobson on Jan 16, 2017 10:49:13 AM

With government regulations tightening on solid emissions, baghouses and cartridge collectors have become status quo in the past 40 years.  The fabric filters (bags or cartridges) remove dust below 1 micron in size.  The high removal efficiency of the filters, have been considered best available removal technology.  This means most processes requiring dust collectors will use a baghouse or cartridge collector.  However, not all processes work well with baghouses and dust collectors.

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Topics: baghouse, Cyclone Pre-Filter, cartridge collector, solid emission, High Particulate Loading, Particulate Recovery

Pharmaceutical Industry: What’s Aerodyne GPC Cyclone got to do with it?

Posted by Tom Hobson on Jan 12, 2017 8:46:52 AM

The pharmaceutical industry has unique requirements that normal industrial applications do not have.  Whether it’s the strict FDA rules or the flexibility of batch production, normal industrial practices and equipment don’t always apply.  Even with continuous production becoming more popular, pharmaceutical applications are different than standard industrial applications.

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Topics: cyclone, dust, gpc, pharmaceutical

Vacu-Valve on a 30-day trial? Are you kidding? Try it NOW…

Posted by Tom Hobson on Dec 21, 2016 10:33:30 AM

The Vacu-Valve is a low cost alternative to a rotary valve.  There are no motors, pneumatics, or moving parts as it operates by using the system vacuum above to seal the sleeve.  This is typically from a cyclone, baghouse, or cartridge collector.  Since the sleeve is split, gravity will slowly pull the solids down through the sleeve until they exit the sleeve and fall into the collection hopper.  As you can see from the description, not all solids will easily pass through this.  The ideal particulate would be sand.  It’s small, spherical shape and the density allows it to easily pass through the valve.  It doesn’t bridge easily.

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Topics: cyclone, dust, dust collector, baghouse, cartridge, airflow

Aerodyne Environmental's blog about dust collection and valves.

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