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Previous by Date: Subject: Re: [DCHAS-L] DMF "use within 5 years" Date: Tuesday, August 4, 2015 11:30:03 AM Author: Margaret Rakas <mrakas**At_Symbol_Here**SMITH.EDU> |
Next by Date: Subject: Re: [DCHAS-L] DMF "use within 5 years" Date: Tue, 4 Aug 2015 15:43:03 +0000 Author: "Sumliner, Jordan" |
Dear Professor Finster,
The dynamics of a fume hood is more turbulent than an enclosure that has been designed to work with powders. As a manufacturer of both types of products, we have endeavored to remove/relocate/minimize the effects of the 'roll' that develops behind the window of traditional fume hoods.
This has enabled our company to provide 'solutions' for working with light powders and nanomaterials which are easily impacted by turbulence found in traditional fume hoods. We have verified this with clients that are using microbalances to 0.1ugms.
I hope this helps.
Best regards,
Raymond Ryan, CEO
Flow Sciences, Inc
2025 Mercantile Drive
Leland, NC 28451
910-200-4239 Tel 1-800-848-3429
rryan**At_Symbol_Here**flowsciences.com
www.flowsciences.com
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-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**med.cornell.edu] On Behalf Of David C. Finster
Sent: Tuesday, August 04, 2015 9:51 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: Re: [DCHAS-L] Fume Hoods
Can someone offer an explanation for the lower-than-usual flow recommendation when using nanomaterials?
Thanks.
Dave
David C. Finster
Professor, Department of Chemistry
University Chemical Hygiene Officer
Wittenberg University
937-327-6441
https://urldefense.proofpoint.com/v2/url?u=http-3A__userpages.wittenberg.edu_dfinster_index.html&d=BQIFAg&c=lb62iw4YL4RFalcE2hQUQealT9-RXrryqt9KZX2qu2s&r=meWM1Buqv4IQ27AlK1OJRjcQl09S1Zta6YXKalY_Io0&m=y90GGN5CEc9Pr_2WVgV7Iw-4FSDM50IlraVESOYSr60&s=5-AUlno8fmWnamzuNqB5ofnjkIestbMYnkN01g_Nb-U&e=
-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Ray Ryan
Sent: Monday, August 03, 2015 10:38 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: Re: [DCHAS-L] Fume Hoods
Luis is correct, low flow down as low as 50LFPM would be best working with nano-materials.
Best regards,
Raymond Ryan, CEO
Flow Sciences, Inc
2025 Mercantile Drive
Leland, NC 28451
910-200-4239
rryan**At_Symbol_Here**flowsciences.com
www.flowsciences.com
CONFIDENTIALITY NOTICE: This e-mail and any attachments are for the exclusive and confidential use of the intended recipient. If you are not the intended recipient, please do not read, distribute, or take action in reliance upon this message. If you have received this in error, please notify us immediately by return e-mail and promptly delete this message and its attachments from your computer system
-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**med.cornell.edu] On Behalf Of Luis A Samaniego
Sent: Monday, August 03, 2015 9:22 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: Re: [DCHAS-L] Fume Hoods
For nanomaterial work, it may require a lower fpm than the 80-100 fpm. Check with the fume hood manufacturer for proper face velocity if this is the case.
Luis Samaniego
Sr Laboratory Safety Specialist
Northwestern University
Office for Research Safety
303 East Chicago Avenue
Ward B-106, W223
Chicago, IL 60611
(312)503-8300
-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**med.cornell.edu] On Behalf Of Czerwinski, Kevin
Sent: Saturday, August 01, 2015 7:33 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: Re: [DCHAS-L] Fume Hoods
Also depends on jurisdiction. State facility in a non-OSHA state? For example, state law in Wisconsin is 100 fpm.
Dr. Kevin M. Czerwinski, Ph.D.
Professor
Department of Chemistry
University Chemical Hygiene Officer
Environmental Health and Safety
B150 Science Building
University of Wisconsin-Stevens Point
2001 Fourth Avenue
Stevens Point, WI 54481
715-346-4154 (Office)
715-340-2216 (Mobile)
> On Aug 1, 2015, at 7:20 AM, Ellen M. Sweet Teach CanIt if this mail (ID 09P0Dic2j) is spam:
Previous post | Top of Page | Next post
>
> Kevin,
> The 80-120 fpm range, from the ANSI Z9.5, is based on performance (containment). The standard also states that some hoods will perform at lower face velocities. Your organization needs to decide what face velocity you want your hoods at, unless you're in California.
> 100 fpm is typical.
>
> Ellen
>
> -----Original Message-----
> From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Kevin Burns
> Sent: Friday, July 31, 2015 10:17 AM
> To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
> Subject: [DCHAS-L] Fume Hoods
>
> I am currently finding myself in trying to deal with a fume hood problem. We had a mechanical problem that needed to be repaired causing The system to be shut down. Now that the system can be turned back on we need to have an air balancer come in and rebalance the system. After that my certification company would come in to certify that the hoods are maintaining proper CFMs for employees to work in them within the laboratories. The air balancer is in disagreement with the certification vendor. The air balancer says we have to have a policy that our face velocities for each hood must be 100cfm, where the certifiers are indicating that it's between 80 and 120 which that was what my understanding was.
>
> I know this falls under ASHRAE standards, ANSI standards and OSHA standards, can you point me in the right direction of where to get the exact information?
>
> Thank you, any information would greatly be appreciated.
>
> KB
>
> Kevin Burns
> Sent from my iPhone
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