Fittings & Adapters - Thorburn Flex Inc

Precision Machined “O” Seal
Hose Adapters and Tube Fitting Bodies
INSTALLATION & ASSEMBLY OF THORBURN O-SEAL
To install “O” Seal assemblies:
1. Assemble fitting body or bodies into desired
port(s). (Fig. 1) Install securely using recommended
torques as per Table. Lubricate O-ring.
2. Cut tubing to required length. De-burr and
clean both tube ends and socket of spud to
keep free of grease, rust, etc.
3. Slip spud on tube end. Make sure tube is completely
bottomed in the socket. (Fig. 2)
Note: nut is inserted over tubing before spud
is positioned.
4. Test fit of tube and spud assembly between the
fitting bodies prior to brazing of the spuds
(Fig. 3). If fit does not conform to alignment criteria,
refabricate tube.
5. Conduct brazing of spud to tube in accordance
with MIL-B-7883B specification. Not recommended
that spud be brazed while in contact
with fitting body. Remove excess braze from
outer surface of spud. (Fig. 4)
6. Install brazed tube assembly to fitting bodies by
screwing nuts on finger tight, then tighten nuts
to recommended torques listed in Table.
1. FITTING BODY INSTALLATION 2. TUBE FULLY BOTTOMED
IN SPUD
O-Ring face
of fitting body
Port End
3. TEST FIT OF ASSEMBLY 4.
Sleeve tube
assembly
Fitting body
Section A
Remove all
braze from
spud surface
ASSEMBLY TORQUE TABLE FOR “O” SEAL HOSE ADAPTER
4 7
/16-20 .172 190±10 22±1 220±10 27±1
6 9
/16-18 .264 420±20 48±2 320±15 35±2
8 3
/4-16 .382 720±35 81±4 480±25 54±3
10 7
/8-14 .482 1260±60 142±7 750±35 84±4
12 1 1 /16-12 .609 1680±80 190±9 1050±50 118±5
16 1 5 /16-12 .812 2520±125 284±14 1440±75 160±8
20 1 5 /8-12 1.045 3080±150 345±17 1680±85 190±9
24 1 7 /8-12 1.312 3780±180 425±20 2000±100 220±10
Alignment Criteria
Common industrial is to allow a .060 inch true position tolerance on bent tube brazed
assemblies. With point A fixed, point B can be anywhere within a .60 radius sphere of true
position. This means that some means of adjustment of fitting ends must be provided.
Protect
face
Remove
excess
braze
Another possible method is to use a C tube
configuration. For a 10 inch leg length, a .060
true position tolerance would mean that the
maximum angle of deviation would be approximately
1/3 of a degree or 20 minutes.
Adjustable elbows used with a C brazed
tube assembly allow additional movement.
Adjustable Tees or Elbows
A
B
40