Page 135 - 4300 Catalog Cover.pdf

F11 Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
EO and EO-2 Metric Bite Type Fittings
Catalog 4300
Features, Advantages and
Benefits of the EO-2 Fitting
System
In addition to the general advantages of the EO tube fitting
system, the unique EO-2 fitting features offer even more spe-
cific benefits:
• Sealing Capability — An elastomeric seal forms the pri-
mary sealingelement, thus assuring leak-free sealing.Even
low-viscosity media such as water or gas are hermetically
sealed. Hydraulic systems, therefore, do not “sweat” at fit-
tings.
• High Pressure Resistance — EO-2 fittings are rated up
to Pmax 900 bar. Sealing lip and seal arrangements have
both been designed so that the sealing effect is supported
by system pressure. The interaction of the retaining ring
and the integrated preassembly tool results in uniform and
reliable fitting assembly.
• Durability — The elastomeric seal does not require any
retightening even after years of operation under severe
working conditions.
• Bite Control — The ideal bite depth is controlled by the
fitting design rather than by the fitters force. Closing the
gap at the end of the manual assembly, the fitter gets clear
signal that setting is completed and the joint is ready for
inspection.
• Functional Nut — Individual components such as the
retaining ring or seal cannot be lost, forgotten, confused or
assembled in thewrong orientation.This dramatically saves
assembly cost and helps to avoid dangerous assembly er-
rors.
• Assembly Cost— With less than 10 seconds cycle time on
the EOMAT III/A (actual presetting process: 1.4 seconds),
the cost of presetting EO-2 is extremely low.
• Integrated Preassembly Tool — Each EO-2 Functional
Nut comes assembled with an integrated assembly tool
that makes sure that the retaining ring securely cuts into
the tube surface without damaging the sensitive inner cone
of the fitting body. This greatly reduces the danger of tube
blow-off, even when using stainless steel tube.
• Unlimited Presetting Tool Lifetime — When EOMAT
machines are used for cost-efficient presetting, the preas-
sembly tools do not wear out as they are only in contact
with the rubber seal. This avoids dangerous blow-off which
can result when traditional bite-type fittings are assembled
using worn presetting tools.
• Make-up — From the wrench-tight position of the preset
EO-2 joint, one short pull on the wrench (approx. 1/6 to
1/4 turn) gives the assembly a quick high rise to required
torque. EO-2 fittings have a solid “hit-home-feel” and excel-
lent over-torque resistance.
• Visible Inspection— There isnodoubt if anEO-2Functional
Nut has been preset correctly or not. Inspection is as simple
as checking if the gap between retaining ring and sealing
ring is completely closed. The tube end does not have to
be disassembled out of the fitting for bite inspection.
• No Phantom Leaks — Lubrication is not mandatory for
the assembly of steel EO-2 fittings. The machine operator
will not be irritated about lubricant coming out of the fittings
once the hydraulic system gets hot.
• Re-Usability / Remakeability— EO-2 fittings canbedisas-
sembled and reassembled many times. There is no wear
or widening of the vulnerable inner cone. Damaged seals
can easily be replaced. All spare DOZ-seals are marked
by size-code (e.g.: 12-L).
• On-Site Maintenance — For the maintenance and re-
placement of EO-2 fittings a set of wrenches is sufficient.
Additional in line components, such as test points (GMA),
ball valves (KH) or T-fittings can be added to an existing
assembly within minutes.
• Interchangeability — The EO-2 Functional Nut can be
used for the whole variety of the broad range of more than
50 configurations in some 25 sizes of standard EO LL, L
and S-series fittings. Changeover from Progressive ring or
weld nipple is easy by the simple use of EO-2 Functional
Nuts.
• Reliability — Millions of EO-2 fittings are working trouble-
free in applications like: Mobile construction equipment,
stationary machine tools, hydraulic presses, plastic injec-
tion molding machines, shipbuilding, offshore exploration,
submarines, railway trains andmilitary equipment.Leakage
does not occur on EO-2 pipework.
• Trouble-Free — Regular bite type fittings allow typical as-
sembly-errors such as: confusion of bite type ring material
and size. Also, the use of worn-out preassembly tool may
result in fitting failure. The clever EO-2 design eliminates
most of these mistakes without making the assembly pro-
cess more complicated.
• Popularity — EO-2 fittings are as easy to assemble as
traditional bite type fittings, but they eliminate most of their
typical assembly problems. EO-2 fittings are therefore ap-
preciated by an increasing number of original equipment
manufacturers. EO-2 also has become the fitting of choice
of end-users that appreciate the leakfree performance, the
easy maintenance and the global availability of the metric
soft-seal bite type system.