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IS0
I NTERNATI O NAL ORGANIZATION FOR STAN DARDlZATl O N
IS0 RECOMMENDATION
R 485
AIRCRAFT WATER-METHANOL PRESSURE CONNECTIONS
1st EDITION
May 1966
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 485, Aircraft Water-Methanol Pressure Connections, was
drawn up by Technical Committee lSO/TC 20, Aircraft, the Secretariat of which is held by the
British Standards Institution (BSI).
Work on this question by the Technical Committee began in 1955 and led, in 1957, to the
adoption of a Draft IS0 Recommendation.
In October 1960, this Draft IS0 Recommendation (No. 409) was circulated to all the IS0
Member Bodies for enquiry. It was approved by the following Member Bodies :
Belgium Israel Spain
Canada Italy Sweden
Chile Japan Turkey
Czechoslovakia Netherlands United Kingdom
France New Zealand U.S.S.R.
Germany Poland Yugoslavia
Iran Portugal
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council which decided, in May 1966, to accept it as an IS0 RECOMMENDATION.
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ISOlR 485 - 1966 (E)
I SO Recommendation R 485 May 1966
AIRCRAFT WATER-METHANOL PRESSURE CONNECTIONS
CONTENTS
1. Connections of 3/4 in (1 9 mm) .
Page 4
2. Connections of 1 $$ in (38 mm) . Page 6
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ISO/R 485 - 1966 (E)
1. CONNECTIONS OF 314 in (19 mm)
The dimensions and tolerances of 3/4 in (19 mm) aircraft water-methanol pressure connections,
suitable for rates of flow up to 25 gal U.K. (1 14 litres) per minute, should be as shown in Figures 1
and 2 below.
FIG. 1. - Dimensions and connection detail
Locking flange
reference plane
View ofslot in direction ofx
Note. - The 3 slots ore identical
3 holes I / '64 in (4.4 mm)
diometer flat bottom drill
\i
LY 4
Detail of locking flange
3 slots equi-spaced
Section of
selective pin holes
0.799 in 20.29
-odius
0.795 (20. I9 mm) Ci:c!e t
of
each corner of slots
13 holes equi-spaced
View in direction
of arrow Y
I Dimension I inches 1 millimetres II Dimension I inches 1 millimetres II Dimension I inches ~ millimetres
0.875 min. ~ 22.22 min. r, 3/64 1 1.2
~ ~ :::: mr:
- ~~~ -~~
1
1.011 max. 25.68 max. 0.030 max. 1 0.76 max.
r2 0.020 0.5
1.006 min. 25.55 min. 0.025 min. 1 0.64 min.
~- __ -~
1.927 max. 48.95 max.
'132 S '164 ~ 3.6
1.923 min. 48.84 min.
I 7.1
~ ~~~ -~ ~
0.786 max. 1 19.96 max.
E e* 0.656 min. ~ 16.7 min. m 1 9ii6 , 39.7 '
0.776 min. I 19.71 min.
-__________._ __ ~ - -
0.411 max. 10.44 max.
min. 1 4.9 min. '132 1 0.8
I 0.406 min. i 10.31 min.
Il
* Valve travel.
Tolerances, unless otherwise stated :
dimensional tolerance = f 0.005 in (f 0.1 mm),
angular tolerance = f O" 15'.
NOTES
@The valve face should be parallel to the locking flange reference plane within this diameter and no part of the
valve may extend beyond this face, but it may be recessed up to 0.030 in (0.76 mm) to allow for compressibility
of valve seal. Configuration of the valve behind this face is optional.
@The valve should be spring loaded. Loading at 0.656 in (16.6 mm) travel should not exceed 10 Ibf (4.5 kgf)
and loading in the valve shut position should be 3 i/2 to 5 lbf (1.6 to 2.3 kgf).
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IÇO/R 485 - 1966 (E)
FIG. 2. - Space envelope and connection detail
PB Locking flange
reference plane
-_L-
7
/
/
I
Typical hose 4
/
unit outline ,
/
,
i
'1
, ,/ /~ ,,
I -CI
This diameter and
...