GORE-TEX GR®gaskets with metal
reinforcement-enhanced sealing performance in low stress and high
thermal cycling applications.
Superior sealing performance and blowout resistance
GORE-TEX GR®sheet gasketing with metal reinforcement is made
from 100% expanded PTFE with a corrugated metallic
insert that changes sealing performance in low stress and high thermal cycling applications. The unique corrugated metal disc provides "memory", or resiliency and reduces the stress to seal. Similar to a spring under compression, this "memory" also
ensures a tight seal, even during wide stress variations
that occur under extreme temperature and pressure cycling conditions. This gasket exhibits the same superior creep resistance and tightness characteristics as all members of the GORE-TEX GR sheet gasketing family.
Construction flexibility
Sandwiched between layers of strong, conformable
GORE-TEX GR sheet gasketing, the metallic insert is available
in a wide variety of metals. Since the basic sandwich
construction is not intended to completely isolate the core from process fluids, the metal should be selected on the basis of its compatibility with these fluids.
The blowout temperature of GORE-TEX GR®gaskets
with metal at three different pressures. (Testing performed by TTRL as part of an exploratory test program.) Note that in all cases, the failure temperature is well above that of
other PTFE alternatives.
High level of tightness
Independent tests were conducted by The University of
Montreal Tightness Testing & Research Laboratory (TTRL) to confirm both tightness and enhanced blowout resistance. The product exhibits a high level of tightness, even during extreme stress cycling, with a maximum tightness capability greater
than 37,000 Tp.
Tightness levels
| Tp @ 1,000 psi (7 MPa) stress | > 100 |
| Tp @ 3,000 psi (21 MPa) stress | > 6,000 |
| Tp @ 5,000 psi (35 MPa) stress | > 10,000 |
| Tp @ 7,500 psi (51 MPa) stress | > 20,000 |
| Tp @ 10,000 psi (69 MPa) stress | > 30,000 |
Tightness parameter (Tp) is inversely proportional to leak rate. High values of Tp
indicate low leak rates - a 10-fold increase
in Tp corresponds to a 100-fold decrease
in leak rate.
Gasket factor: Gb = 238 psi / a = 0.229 / Gs = 6.5 x 107 psi
(PVRC definitions) (Tp, as defined by the PVRC, is the pressure
(in atmospheres) required to create a 1 mg/sec helium leak in a
standard NPS 4" (101.6 mm) diameter gasket.)
Thanks again, Gore, for being our Vendor of the Month!
Your innovative products are in stock at Big River Rubber & Gasket. For more information or to order fabricated, boxed, or sheet Gore products, call
1-800-626-7030.
are registered trademarks of
W. L. Gore & Associates, Inc.
FOR MORE
INFORMATION OR TO
ORDER GASKET PRODUCTS
connect@bigriverrubber.com
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