Modular design + positive pressure or negative pressure = cleaner air solutions for manufacturers

Twelve Sentry Air Model 300 Mounted Air Cleaners being prepared for shipment.

These units being prepared for shipment are headed to a manufacturer of optoelectronics devices.

As you can see, the Model 300s above are configured with plenums, which will be attached to an existing ventilation system.

Positive pressure systems

Diagram show air flow direction in Sentry Air positive pressure system.

Air flow direction in positive pressure system.

Positive air pressure systems protect products because they move filtered air into containment hoods where sensitive devices can be assembled in a very clean environment. A single mote of dust can ruin their performance.

For this application, air from the ventilation system is moved through the plenums, through the Model 300’s HEPA filters – where contaminants are trapped – and into each hood’s work space.

Negative pressure systems

Air flow direction in negative pressure system.

Air flow direction in negative pressure system.

As you know, Sentry Air also designs and manufacturers negative pressure systems, including our ductless fume hoods.

The direction of air flow in these systems is opposite of the positive pressure systems.

The air is moved from the containment hood into HEPA filters, which can protect workers from inhaling harmful substances.

With equal effectiveness, the Model 300s above could be readily used in a negative pressure arrangement because of modular design principles.

Modular design

Industrial design professionals strive to create system modules that re-use standardized components for different applications.

Testing becomes straight-forward, inventory controllable, and whole families of products can be created with confidence in their performance.

Meeting customer needs with cost-effective products is the result of good modular design.

We do that.

Our products include the Series 100, Series 200, Series 300, Series 400, and Series 500 lines of air purification devices.

Each family of products provides appropriate air volume with trusted components in each different configuration for their intended applications.

Give us a call

Our applications specialists would be delighted to talk with you about cleaner air solutions for your manufacturing processes.

Call them at 800.799.4609, email, or use the comment form below on our website.

Removing dust and mold spores during book restoration and conservation

paper_conservation_0001The art and precision of book restoration and conservation is a honed skill; one that involves countless hours of detailed yet delicate labor.

The passion that goes in to restoring rare and antiquated works of literature is evidenced by the finished product.

By removing layers of dirt and remediating mold spores from the pages, original script comes to life – but if you’re not careful those dusts and spores can expose you to a host of respiratory concerns.

Avoid inhaling dust, mold spores

Common surface contaminants of old books are dust, dirt, stains and mold spores.

A variety of factors contribute to the presence of these contaminants:

  • Environmental conditions
  • Indoor air quality
  • Atmospheric pollutants
  • Pests
  • Improper handling/storage
  • Human oils, fingerprints

092111_1454_taleoftwobo5Depending on the condition of the book and what type of contaminants are found, different restoration techniques may be used.

Some techniques include:

  • Soft and Hard Brushes
  • Vacuums
  • Chemical Sponges
  • Pressurized Air
  • Dryers
  • Isopropyl Alcohol / Organic Solvents
  • Leather protectants

These methods generate fine particulate matter and chemical fume that has the potential to become airborne. Once airborne, these particles are easily inhaled and can deposit on the lungs and within the airways.

Health effects of dust, mold inhalation

The Occupational Safety and Health Administration (OSHA) notes that not all dusts produce the same degree of health hazard; their harmfulness depends on the composition, concentration, size, shape and exposure time.

“Excessive or long-term exposure to harmful respirable dusts may result in a respiratory disease called pneumoconiosis. This disease is caused by the buildup of mineral or metallic dust particles in the lungs and the tissue reaction to their presence. Pneumoconiosis is a general name for a number of dust-related lung diseases.”

A professional mold remediation expert should be consulted before handling books with mold spores. If given the all-clear to remove it, proper respiratory protection should still be used.

According to the CDC, the inhalation of mold spores has a varying effect on individuals and can be especially harmful to those who are sensitive to it or have asthma. Exposure has also been linked to upper respiratory issues in otherwise healthy people.

Ventilation equipment for your restoration work

Sentry Air Systems has fume extraction and air purification equipment to help reduce the amount of particulate, mold spores, and fume generated during the restoration process.

  • Source-capture units work to arrest fume and particles at the point of generation, where exposure is most likely to occur. This type of unit better protects the operator from respiratory inhalation exposure.
  • Ambient air cleaners work to capture renegade particles and fume found in general room air. This type of filtration is great for freshening up otherwise stale or musty air; an issue commonly found in book storage areas where paper, leather and other fibrous material can off-gas odors.

For source-capture filtration, we recommend our Ductless Fume Hoods (DCH) and Portable Downdraft Bench (DDB).

Sentry Air 40" W DCH

Sentry Air 40″ W DCH

Our DCHs are self-contained workstations that utilize a powerful fan to pull harmful air through the hood’s filtration system before recirculating cleansed air back into the room. The hood’s HEPA filter media effectively captures up to 99.97% of particles down to 0.3 microns in size. This type of filter is great for restoration techniques that produce dust, mold spores and other fine particulate. If your application generates fume or other VOC vapor, we suggest pairing the HEPA filter with an Activated Carbon filter to help in the adsorption of these fumes.

In an earlier blog post, we share how one art conservator uses a SAS enclosure to exhaust hazardous chemical fume: Testimonial: Margaret Burnham, Art Conservator, Birmingham Museum of ArtMargaret Burnham, art conservator, Birmingham Museum of Art.

35"W Portable DDB - Stand

35″W Portable DDB – Stand

Our Portable Downdraft Bench is great for work environments that are on the move. This unit comes in either a standing or sitting configuration and the heavy-duty casters make moving the unit easy. The negative pressure, perforated work surface pulls harmful particles and fume down through the table and into the filter chamber. This unit’s compact design and ease of use makes for quick assimilation into labs, libraries, and museums.

For Ambient Room Air Cleaners, we recommend our Portable Room Air Cleaners and Model 700 Free Hanging Air Cleaner.

Model 400 Portable Room Air Cleaner

A Portable Room Air Cleaner (PRAC) is low profile and can be placed throughout a room for secondary air cleaning. With a variety of sizes and air volume, Sentry Air has a PRAC suitable for most room sizes and environments.




Model 700 Free Hanging Air Cleaner

If floor space is minimal, suspend a Model 700 Free Hanging Air Cleaner from the ceiling. The Model 700 has two main filter chambers along with a pre- and post-filter that work to rid the air of particles and odor to provide a fresher work environment.

All of the units recommended utilize ductless technology, and because the air is recirculated, no exterior-ducting or loss of heat and air conditioning is necessary.

Disclaimer: Sentry Air fume extractors are not suitable for restoration techniques that utilize rubber or eraser dust as these particles may be combustible. 

Contact Us

If you would like more information or a quote, please contact Sentry Air at 800.799.4609, email, visit our website or fill out the comment form below.