DEAR(Sanitized)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001600020026-5
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: April 19, 2000
• Sequence Number: 26
• Publication Date: May 13, 1964
• Content Type: LETTER

Approved For Release 2000/06/07 : CIA-RDP78B04747A001600020026-5
STATOTHR
DECLASSIFICATION REVIEW BY NIMA / DoD
Ref: E80 ^ 13 May 1964
STATOTHR
GSA Region 3
7th and D Street, SW
Washington 25, D. C.
STATOTHR
Your plans for handling the air cooling of the installation sound very
reasonable. As I understand it you will start with 85? air and pre-cool
650 cfm of it to 45?F, then pass only 100 cim over a small chemical de-
humidifier. After that a second cooling coil will reduce it to 42? at 45%
relative humidity. Since this will be a completely closed system with very
little leakage, if any, the small dehumidifier should be very satisfactory.
We haven't fully tested the pressure drops through our system yet, but
when we do I' l l send the data.
Regarding the vacuum system, we have had good results with 1 1/2
inches of mercury vacuum. (This is 36 inches of water). The reason for the
requirement is that there are heavy losses through the ducting and the
structure of the platen, not all of which are fully determinable. A good
grade centrifugal blower will meet the requirements, we believe, and a posi-
tive displacement machine should definetely not be required.
I've enclosed a copy of the letter and the electrical specificatien
sheet BY0045 originally sent to Mr~ before he left. If he had done
STATOTHR
Approved For Release 2000/06/07 : CIA-RDP78BO4747AO01600020026-5
 .STATOTHR
elease 2000/06/07 : CIA-RDP78B04747A001600020026-5
13 May 1964
Pogo 2
STATOTHR
any work on this ps chaps would have a r.conl of It.
I appreciate how the many special projects with hlghe r prlor$ty leap
popping up but Ply lot me $mow if you expect the kws *llation eeedlr
to take larger thaw Auoust 1. Also plane call If there taro any guastfons.
Sincerely,
STATOTHR
oMt ~Emqln*er
IWT/bd
Emlowas
STATOTHR
Approved For Release 2000/06/07 : CIA-RDP78B04747A001600020026-5