Table of Contents
Advertisement
1.4.3
Special features
Viega ProPress copper, 316 stainless steel and
Zero Lead bronze fittings meet the federal lead-free
requirements of NSF 61-G through testing under
NSF/ANSI 372 (0.25% or less maximum weighted
average lead content). Fast and easy; one squeeze
of the trigger makes the connection on any size
tube in four to seven seconds.
1.4.4
Viega Smart Connect feature
In Viega ProPress ½" to 4" fittings, the Smart
Connect feature (Figure 1.2) assures the escape of
liquids or gases from inside the system past the
sealing element of an unpressed connection. The
function of this feature is to provide the installer
quick and easy identification of connections that
have not been pressed prior to putting the system
into operation (Figure 1.4).
Figure 1.2: The Smart Connect feature of Viega
press fittings is color marked on the bead
When the fitting is pressed (Figure 1.3), a
permanent, sealed, non-detachable, mechanical
connection is created.
Figure 1.3: Section of a press fitting in unpressed
(A) and pressed (B) condition
Unpressed fittings from other manufacturers,
without the patented Smart Connect feature,
may not leak during the initial system pressure
test. However, they can unseat in future system
operation. The Smart Connect feature is designed
to protect from this potential risk.
IM-PP 724607 0815
Figure 1.4
1
2
Identify an unpressed
Upon identification,
connection during
use the press tool
pressure testing
to press the fitting,
when water flows past the
making a permanent leak-
sealing element.
proof connection.
1.4.5
Sealing elements
Viega ProPress EPDM sealing element
Operating temperature:
0°F to 250°F (-18°C to 120°C)
Viega ProPress and ProPress for stainless 316
fittings are manufactured with a high-quality EPDM
sealing element installed at the factory. This sealing
element is used mainly in the applications of
potable water, hydronic heating, fire sprinkler and
compressed air installations. EPDM, or ethylene-
propylene dienemonomer, is shiny black in color.
The EPDM sealing element is
a synthetically manufactured and peroxide
cross-linked, general-purpose elastomer with
a wide range of applications.
It possesses excellent resistance to aging, ozone,
sunlight, weathering, environmental influences, most
alkaline solutions and chemicals used in a broad
range of applications.
The EPDM sealing element has particularly good
resistance to hot water, making it ideal for seals
and gaskets in heating systems, fittings and
household appliances (e.g. washing machines,
pumps, dishwashers).
All sealing elements are inserted into the fitting using
an H1 Grade lubricant registered with NSF, the
USDA and approved for use under FDA 21 CFR.
Viega ProPress FKM sealing element
Operating temperature:
0°F to 284°F (-18°C to 140°C)
FKM is well known for its excellent resistance
to petroleum products and solvents as well as
exceptional high-temperature performance.
The FKM sealing element is a special-purpose
elastomer typically installed where higher
temperatures are required.
FKM, a fluoroelastomer, is dull black in color. It
possesses excellent resistance to aging, ozone,
sunlight, weathering, environmental influences,
oils and petroleum-based additives. Its superb
resistance to high temperatures and petroleum-
3
Viega ProPress
connections are fast,
flameless and guaranteed.
7
Advertisement
Table of Contents
