TPI November 2015

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November 2015 Tube Products International 53
Fi t t ings , f langes , valves & connectors
Tube connection
system for extreme
conditions
Multi-part steel flare fittings are part
of the Stauff Connect range, which
was developed for the detachable
connection of tubes. They consist
of fitting bodies, cone adapters with
O-rings, support sleeves and union
nuts, and are suitable for all common
metric outer tube diameters from 6 to
42mm.
Flare fittings allow leak-free and pullout-
proof connection of tubes with a 37°
flare in line with DIN 3949, with the
threaded fittings with 24° cone in line
with ISO 8434-1. They are primarily used
in hydraulic systems where previously
complicated welding connections had
to be used for safety reasons. Suitability
for a permitted rated
pressure up to 500 bar
(in the Light Series)
and up to 630 bar
(in the Heavy Series)
allows application even under extreme
conditions.
As with all connectors from the Stauff
Connect range, all components are
designed for the rated pressure with a
quadruple safety factor, ie under static
stress tests the bursting pressure has
to be at least four times higher than the
stated pressure value.
The elastomer seals on the contact
points of the 37° flare fitting permanently
increase the sealing effect, even under
vibrations and pressure fluctuations.
The useful life of the components is
increased by a high-quality zinc nickel
coating that is claimed to set new
standards in the area of corrosion
protection. Areas of application include
press engineering, ship building/
offshore and mobile hydraulics.
Walter Stauffenberg GmbH & Co KG
– Germany
Section view of a flare fitting
Exploded view of a flare fitting: (from left) threaded fitting, flare fitting with
O-rings, tube with 37° flare, pressure sleeve and coupling nut