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Previous by Date: Subject: [DCHAS-L] Last week to register Date: Thursday, October 22, 2020 at 7:16:06 AM Author: Richard Palluzi <000006c59248530b-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> |
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Hi All!
I have attached a couple papers below regarding low volume fume hoods. Some reservations and precautions advised.
https://flowsciences.com/thefeasibilityoffumehoodcontainmentat40fpm/
https://flowsciences.com/vav-energy-savings-high-low-fume-hood-face-velocities/
Dr. Bob Haugen
Director of Product and Technology Development
Flow Sciences, Inc.
910 332 4878
Containment Products •
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CONFIDENTIALITY NOTE: This e-mail, including all attachments, is directed in confidence solely to the person(s) to whom it is addressed, or an authorized recipient, and may not otherwise be
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of Flow Sciences Inc. or its employees.
From: Dr Bob
Sent: Wednesday, October 21, 2020 7:36 PM
To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton..EDU>
Subject: RE: [DCHAS-L] Chemical Fume Hood Alarm Set Points
Hello Debra!
Many better hoods can be set at 18 inches and 80 fpm.. Below this face velocity, bad things can begin to happen. Remember that at around 5 air changes per minute or lower, corrosion and explosions become much more likely.
I'll send more stuff from work in AM!
Bob Haugen
Sent from my Samsung Galaxy , an AT&T LTE smartphone
-------- Original message --------
From: Debra M Decker <00001204b93f9a5e-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Date: 10/21/20 6:47 PM (GMT-05:00)
Subject: Re: [DCHAS-L] Chemical Fume Hood Alarm Set Points
To tag off Ralph's list, I'd also want to know if hood sashes are horizontal sliding or vertical rising or combination sashes.
Debbie
On Oct 21, 2020 11:31 AM, Jordan Sumliner <0000139f25c2a3e1-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> wrote:
Good Afternoon,
Our chemical hygiene plan as well as other resources indicates the average face velocity should be between 80-120 LFM when sash is at 18 inches, and we do train users to check the local air flow monitor before use. If the monitor shows an air flow outside that range, we would not want users to use the chemical fume hood (exceptions are for equipment setup) and to report it.
In addition, we are updating our alarm set points at a local (the end user is alerted) and at a system level (meaning EHS and facilities are alerted) for a higher level of control over these critical engineering controls.
I would like to get opinions on what you have local air flow monitors set to alarm at (high and low), if you differentiate at a system level and any considerations to make. We do not have occupancy sensors on our hoods, but some are setup to adjust a damper when there is a drop in air flow. The other are constant volume with no adjustments possible with dampers .
Thanks,
Jordan Sumliner
Associate Environmental, Health, Safety and Sustainability Specialist
Environmental, Health, Safety and Sustainability
GSK
14200 Shady Grove Road, Rockville, MD 20850
Email jordan.x.sumliner**At_Symbol_Here**gsk.com
GSK monitors email communications sent to and from GSK in order to protect GSK, our employees, customers, suppliers and business partners, from cyber threats and loss of GSK Information. GSK monitoring is conducted with appropriate confidentiality controls and in accordance with local laws and after appropriate consultation.
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
On Oct 21, 2020 11:31 AM, Jordan Sumliner <0000139f25c2a3e1-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> wrote:
Good Afternoon,
Our chemical hygiene plan as well as other resources indicates the average face velocity should be between 80-120 LFM when sash is at 18 inches, and we do train users to check the local air flow monitor before use. If the monitor shows an air flow outside that range, we would not want users to use the chemical fume hood (exceptions are for equipment setup) and to report it.
In addition, we are updating our alarm set points at a local (the end user is alerted) and at a system level (meaning EHS and facilities are alerted) for a higher level of control over these critical engineering controls.
I would like to get opinions on what you have local air flow monitors set to alarm at (high and low), if you differentiate at a system level and any considerations to make. We do not have occupancy sensors on our hoods, but some are setup to adjust a damper when there is a drop in air flow. The other are constant volume with no adjustments possible with dampers .
Thanks,
Jordan Sumliner
Associate Environmental, Health, Safety and Sustainability Specialist
Environmental, Health, Safety and Sustainability
GSK
14200 Shady Grove Road, Rockville, MD 20850
Email jordan.x.sumliner**At_Symbol_Here**gsk.com
GSK monitors email communications sent to and from GSK in order to protect GSK, our employees, customers, suppliers and business partners, from cyber threats and loss of GSK Information. GSK monitoring is conducted with appropriate confidentiality controls and in accordance with local laws and after appropriate consultation.
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
On Oct 21, 2020 11:31 AM, Jordan Sumliner <0000139f25c2a3e1-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU> wrote:
Good Afternoon,
Our chemical hygiene plan as well as other resources indicates the average face velocity should be between 80-120 LFM when sash is at 18 inches, and we do train users to check the local air flow monitor before use. If the monitor shows
an air flow outside that range, we would not want users to use the chemical fume hood (exceptions are for equipment setup) and to report it.
In addition, we are updating our alarm set points at a local (the end user is alerted) and at a system level (meaning EHS and facilities are alerted) for a higher level of control over these critical engineering controls.
I would like to get opinions on what you have local air flow monitors set to alarm at (high and low), if you differentiate at a system level and any considerations to make. We do not have occupancy sensors on our hoods, but some are
setup to adjust a damper when there is a drop in air flow. The other are constant volume with no adjustments possible with dampers .
Thanks,
Jordan Sumliner
Associate Environmental, Health, Safety and Sustainability Specialist
Environmental, Health, Safety and Sustainability
GSK
14200 Shady Grove Road, Rockville, MD 20850
Email jordan.x.sumliner**At_Symbol_Here**gsk.com
GSK monitors email communications sent to and from GSK in order to protect GSK, our employees, customers, suppliers and business partners, from cyber threats and loss of GSK Information.
GSK monitoring is conducted with appropriate confidentiality controls and in accordance with local laws and after appropriate consultation.
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
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