Download OP03-001

SOFIA IHB-0.0
CHAPTER 2: SOFIA Science Instrument ICDs
KF40 Flange (per ISO 2881-1 and DIN 28403)
(TYP)
Centering Ring (MDC #710002)
(TYP)
98144423-001 Fitting
(x4)
B
V
WL 222.4
V
V
WL 217.4
V Vacuum System Fitting
B Blower System Fitting
STA 1692.5
STA 1688.0
STA 1683.5
Figure 2-45. A Schematic Of The U4 Disconnect Panel With Fittings For The Three Upper Deck
Vacuum Pumps
The details of this interface are described in the document titled the “Vacuum Pump System to
Science Instrument”. From the rigid aircraft vacuum lines, the lines drop in diameter 38.1 mm
(1.5 inches) ID to run approximately 15 meters (49.21 feet) through the CLA to KF flanges
mounted on the counter weight panel of the telescope assembly. Vacuum lines from the counter
weight plate (CWP) to the science instrument or instrument mounting flange will also be 38.1 mm
(1.5 inches) ID and will be provided by USRA. Flexible pumping lines will be available in a variety of lengths and will always end with a KF vacuum flange.
2-60
Science Instrument and TA Flange Pumping System