1. Manufacture: Seal-Lok
fittings conform to SAE J1453. This specification not only controls
dimensions and tolerances of Seal-Lok fittings, but includes minimum
performance requirements. (All shaped fittings are machined from forgings
for additional strength.)
2. Sealing Capability: An elastomeric
O-ring forms the primary sealing element. The O-ring is contained within a
precision machined groove on the fitting body. It is compressed into the
groove by the flat face of the tube flange or braze sleeve, thus assuring
leak free sealing.
3. Pressure Rating: Seal-Lok fittings
are the highest working pressure industrial fitting on the market ranging
from high vacuum to 9,000 psi depending on size.
4. Vibration and Fatigue: Seal-Lok
fittings have been extensively used in applications that experience severe
vibration and shock with no field problems. See Bulletin 4350-B8 for
complete test results.
5. Visible Inspection:
Flanged: The surface of the flange
should be reasonably smooth with no deep scratches, gouges or
indentations. Minor surface imperfections outside of the seal area,
approximately the middle of the flange face, are acceptable.
Brazed: Presence of braze alloy 360°
around the back of the sleeve (tail) allows for a quick (non-destructive)
check for proper braze joint attachment.
6. No Tube Entry: Tube does not enter
into the body of the fitting allowing for zero clearance, drop-in
installation of components. This makes repair and maintenance very easy.
7. Assembly: A variety of sleeve
attachment methods are now available. These include torch brazing and
induction brazing and flanging. Seal-Lok fittings can also be used as hose
8. Make-Up: From the finger tight
position, one short pull on the wrench gives the assembly a quick high
rise to required torque. Seal-Lok fittings have a solid "make-up
feel" and excellent over-torque resistance.
9. Tube Wall: The brazing of the
sleeve to the outside of the tube allows Seal-Lok fittings to be used on
thin to heavy wall tubing. Seal-Lok fittings can also be used with the
widest range of tubing grades.
fittings can be disassembled and reassembled many times. Simply replace
the O-ring on the tube end and tighten to recommended torque.
11.Temperature Range: Seal-Lok
fittings are suitable for sub-zero through elevated temperature
applications. Service temperature is limited by the material of the chosen
12.Materials: Seal-Lok can be
manufactured from a wide variety of materials. The most popular materials
currently used are steel and stainless steel. Upon request, the Tube
Fittings Division can machine Seal-Lok fittings from other materials.
13.Envelope Size: Redesign of
hydraulic systems are normally unnecessary because Seal-Lok fittings are
similar in size to the most popular fitting of all, the Triple-Lok 37°
flared fittings. The additional 1 1/2 threads on the port end fit all
standard SAE ports. Seal-Lok fittings are excellent hose adapters.
14.Available Configurations: Seal-Lok
fittings are available as a standard in over thirty different
configurations . Some of these configurations are available in as many as
twenty-seven different size combinations. Several of these fittings can
actually reduce the total number of connections needed in a system. (Other
configurations can be manufactured upon request.)
15. Available Sizes: Seal-Lok fittings
are available as standard in sizes 1/4" (-4) through 2" (-32),
the largest range of ORFS fittings in the industry. Only Seal-Lok offers
size 2" (-32) in the industry.
16. Parflange Technology: Specifically
designed to be used with Seal-Lok fittings, the Parflange machines utilize
an orbital cold flow forming process to produce a smooth, rigidly
sup-ported 90° sealing surface on the tube end. The Parflanged tube ends
meet SAE J1453 for formed tube connections. This patented Parflange
process eliminates the need for messy and time-consuming brazing.
17. Captive O-ring Groove: Seal-Lok
fittings are manufactured with a captive O-ring groove (CORG) designed to
prevent O-ring fall-out prior to final assembly. The CORG design conforms
to SAE J1453.