Page 102 - 4300 Catalog Cover.pdf

Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
D4
4300 Catalog Ferulok® Flareless Bite Type Fittings
Dimensions and pressures for reference only, subject to change.
Introduction
Thebasicflarelessbite typefittingwasfirst developed inEurope in
theearly 1930s.TheFerulok fittingwas later developedbyParker
Hannifin and introduced to theU.S.market in themid-1940s.The
Ferulok fitting design utilizes a combination of proven European
features, coupled with many innovative product improvements
instituted by Parker Hannifin. Today, the Ferulok fitting design
and performance capabilities far exceed the strict requirements
of SAE J514 and Military Standards (MILF18866). The Ferulok
fitting is a flareless fitting that consists of a body, a one-piece
precision machined ferrule, and a nut. On assembly, the ferrule
“bites” into the outer surface of the tube with sufficient strength
to hold the tube against pressure, without significant distortion
of the inside tube diameter.
The ferrule also forms a pressure seal against the fitting body.
Ferulok fittings have a visible bite, allowing the fitting assembler
to visually inspect the bite quality, thus significantly minimizing
the risk of improper assembly and related service problems.
Ferulok fittings are especially suitable for use with tube wall
thickness ranging from medium to extra heavy. (Refer to Table
D2, “Recommended Tube Wall Thickness.”) Ferulok’s robust
construction and proven sealing characteristics have gained
it popularity in diverse markets and applications. Ferulok fit-
tings are routinely used in markets such as: machine tools, air
compressors, chemical, military, oil refineries, paper making,
thermoplasticsprocessing, andmanygeneral industrial hydraulic
applications.
Table D1 – Standard Material Specifications for
Ferulok Fittings
Note: On request, Ferulok can be furnished in materials other than
those shown above.
Finish: Zinc with yellow chromate (being changed to Zinc
Chromium 6 Free) is used on all standard steel products.
Fig. D1 – Ferulok Components: Body, Ferrule and Nut
Design and Construction
The three components of the Ferulok fitting are designed and
manufactured to produce a high pressure, leak-free joint upon
proper assembly.
The Ferulok Body – Ferulok fitting bodies are available in over
thirty configurations. The shaped products (i.e. elbows, tees,
crosses) are hot forged, then machined to the stringent Ferulok
fitting specifications.The forging process used by Parker further
improves the strength and metallurgical properties of the fitting
material. Straight products are made from cold drawn bar stock.
The cold drawing operation ensures consistently tight dimen-
sional tolerances, smooth surfaces and significantly improved
strength.
The Ferulok Ferrules – Ferulok fitting ferrules are precision
machined with all dimensions and surfaces closely controlled,
particularly the critical bite edge, which is monitored on an on-
going basis. Ferrules are then heat-treated in a manner that
provides the hardness, strength, and toughness necessary to
satisfy the demanding service conditions that exist in industry
today.
The Ferulok Nuts – Ferulok fitting nuts are either cold formed
to size and shape, or machined from cold drawn material. The
cold forming and cold drawing operations provide a more tightly
packed grain structure, thus improving the material’s strength.
In addition, cold forming significantly improves the fatigue or
endurance strength of the nuts.
Ferulok Fittings
Steel Stainless Steel
ASTM Type ASTM Type
Cold Formed Bodies A576 C1010/C1008 — —
Forged Bodies A576 1214/1215 A182 316
Bar Stock Bodies A108 12L14 A479 316
Cold Formed Tube Nuts A576 C1010 A479 316L
Bar Stock Tube Nuts A108 12L14 A479 316
Tube Ferrules A108 12L14 A564 630