DESCRIPTION
Teadit Metalflex® 911
Spiral-wound gaskets are made of a
preformed metallic strip and a soft filler material (PTFE or graphite),
wound together under pressure. The metal strip holds the filler, resulting
in excellent mechanical resistance, resilience and recovery.
CONSTRUCTION
This spiral wound is constructed with a metallic winding and
a filler element. The winding is manufactured from metal in a complicated
form of a spiral, in assembly with a filler material. The metallic Winding,
of special profile, provides excellent resistance, compensating the changes
in operational conditions such as: variations of pressure and temperature,
vibrations, thermal shocks, etc. The filler materials fill the
irregularities of the flanges.
APPLICATION / SERVICE
For applications with high
temperature variations (thermal cycling), and/or pressure variations, and/or
flange rotation problems etc., gaskets with adequate residual stress (stress
retention), flexibility and recovery are needed. TEADIT spiral-wound gaskets
have been designed to meet these demanding requirements. The flanges should
be designed to provide compression limitation to the gasket's optimum
compressed thickness (Please contact Teadit Technical Department for
details).
| MATERIAL
PROPERTIES |
| Filler Material |
Max.
Temperature |
| Mica Graphite |
232°C (450 °F) |
| Flexible
Graphite |
450°C (842 °F) |
| PTFE |
260°C (500 °F) |
|
General Note: Pressure
Construction may be specified from 150 to 2500 class. |
Teadit Metalflex® 911-M
DESCRIPTION
Developed basically for
the same application as the Metalflex® 911, but specifically for
elevated vacuum, pressures and temperatures, this Metalflex® 911-M
is a modified 911 with an internal ring that fills the space between
the flanges, avoiding turbulence in the flow of the fluid or as a
protection against corrosion or erosion. It is also used as a
compression limit.
Second, gaskets with PTFE and flexible graphite filler have a
tendency to inward buckle thus the use of an inner ring is
recommended.
CONSTRUCTION,
APPLICATION/SERVICE, MATERIAL PROPERTIES
See Teadit Metalflex®911
Teadit Metalflex® 911-T
DESCRIPTION
Double Jacketed bars are
welded into the winding of a Metalflex® 911 developed for shell and
tube heat exchangers with several passes.The bars are manufactured
in the same material and are plasma or spot welded to the winding.
When used in a properly designed groove, Metalflex® 911-T
generally provide good sealability. In many other cases the addition
of solid metal inner and outer rings (913MT) are recommended.
CONSTRUCTION,
APPLICATION/SERVICE, MATERIAL PROPERTIES
See Teadit Metalflex®911
Teadit Metalflex® 914
DESCRIPTION
Style Metalflex® 914
spiral wound gaskets are windings in non-circular forms like oval,
rectangular and square with rounded corners, diamond, oblong or pear
shaped.
CONSTRUCTION,
MATERIAL PROPERTIES
See Teadit Metalflex®911
APPLICATION/SERVICE
Teadit Metalflex® 914
spiral wound gaskets are
used in boiler handholes and manholes, equipment, engine
head-gaskets and exhaust systems. |
Note: The addition of solid metal inner rings is recommended
for some applications to avoid crushing or pinching on the gasket ID.
