| Style R Basic construction, inner and outer diameters are reinforced with several piles of metal without filler to give greater stability and better compression characteristics. Suitable for tongue and groove or male and female or grooved to flat face assemblies. Style RIR |
Style CG
Utilizes an external ring
which accurately centers
gasket on flange face:
provides additional
radial strength to
prevent gasket blowout
and acts as a compression
stop. A general purpose
gasket suitable for use
with flat face and raised
face flanges.
eCatalogs Flexitallic Style CG Gaskets
Style CGI
Suitable for use with flat face and raised face flanges and specified for high pressure/temperature service or where corrosive or toxic media are present. Note on use of inner rings: ASME B16.20 which covers spiral wound gaskets requires the use of solid metal inner rings in:
 | Pressure Class 900, nominal pipe sizes 24” and larger |
| Pressure Class 1500, nominal pipe sizes 12” and larger |
| Pressure Class 2500, nominal pipe sizes 4” and larger |
| All PTFE filled gaskets. |
ASME B16.20 recommends
the use of inner rings if
the user’s experience has
shown inward buckling of
the gasket.
Flexitallic recommends
the use of inner rings
for the following
applications:
| Vacuum service or suction side of rotary equipment such as pumps and compressors. |
| Aggressive media, high pressure or temperature. |
| Surface finishes smoother than 125 micro-inch. |
| If over compression of the gasket is a concern. |
It is customary to select inner ring material to be the same as the metal winding.
Style HE gaskets are used
for heat exchangers where
pass bars may be
required. The outer
portion is of standard
spiral wound
construction, whereas the
rib partition is normally
of single or double
jacketed style, securely
fastened to the I.D. of
the spiral wound portion.
This style is identical
to the Style HE, except
that it is fitted with an
outer guide ring.
Note-Style HE and Style
HE-CG gaskets have a
primary seal of spiral
wound construction with
its inherent resiliency
and excellent sealing
quality. It is necessary
that dimensional drawings
locating the pass ribs
and the configurations be
submitted for all
inquiries and orders for
these style gaskets.
Style HE-CGI With Inner
Ring & Outer Ring
The Style HE-CGI is a
variation of the style
CGI spiral wound gasket,
developed for use on heat
exchanger TEMA type
flange arrangements. In
conjunction with an inner
ring, the standard spiral
wound construction also
supports an outer wound
steel nose, designed for
the purpose of accurate
gasket location. It is
also available with solid
metal outer ring.
Style CG-RJ
This style designates a
specially sized CG gasket
to be used on standard
ring joint flanges. The
outer ring is dimensioned
to cover the ring joint
grooves and to prevent
the spiral wound portion
from entering the groove.
This type of gasket
should be used only as a
maintenance repair item.
Carrier Ring
The carrier ring gasket
consists of two spiral
wound gaskets placed in a
specially machined
metallic ring. The major
advantages of the carrier
ring are its high
recovery, and ease of
handling compared to
standard spirals.
Style 625
Style 625 spiral wound
gaskets are similar to
Style R gaskets, with a
thickness of 0.0625”.
These gaskets are widely
used wherever space
restrictions indicate the
need for a wafer thin
gasket design capable of
sealing high pressures.
Style T
These gaskets are used
for boiler handhole and
tube cap assemblies. They
are available in round,
oval, obround, square,
pear and diamond shapes.
Please note Style T
gaskets rely on internal
pressure in the boiler to
properly seat the gasket.
This means, when a
hydrostatic test is
performed on the gasket,
the pressure exerted
against the plate will
further compress the
gasket-and it is
necessary to tighten each
nut to compensate for the
additional compression of
the gasket under load.
Style M, MC & MCS
These styles are designed
for boiler manhole cover
assemblies. They are
usually round, obround or
oval shape, depending of
course , upon the manhole
plate configuration.
Style MC gaskets have
pre-formed inner and/or
outer rings made of
spiral windings. This
centering guide permits
the gasket to assume its
correct position and to
compensate for
inequalities in plate
contours and fillets in
cold-pressed plates as
well as to prevent
shouldering and pinching
caused by radial
misplacement. Style MCS
gaskets are manufactured
with a solid metal inner
and/or outer ring which
also prevents over
compression of the gasket
in high pressure systems.
The style LS spiral wound gasket has been engineered by Flexitallic to provide an alternative to sheet gaskets in Class 150 and Class 300 service. Style LS gaskets have the inherent strength, resiliency and blowout resistance of spiral wound gaskets, yet require low bolt load for seating. They are manufactured with high purity Flexicarb flexible graphite filler or PTFE filler for optimum sealability, and are available for the full range of standard Class 150 and Class 300 flanges, as well as other non-standard low pressure flanges. US PATENT 5161807.
CGI-MRG GASKETS
The Flexitallic CGI-MRG
gasket has been developed
specifically for use on
HF Alkylation Units were
corrosion of the flange
faces presents a real
problem.
Traditional spiral wound
gaskets use Monel or
carbon steel inner rings.
However, both materials
have limitations and
neither mechanism offers
a “tight” seal between
the HF acid and the Monel
windings of the spiral
wound gasket. The CGI-MRG
gasket offers a primary
seal and prevents any
corrosion of the carbon
steel flanges. The CGI-MRG
gasket is designed to
suit standard flanges and
requires no extra bolt
stress to compress and
maintain a tight seal.
H.O.T. GASKETS
The H.O.T. gasket utilizes high recovery, heat treated Inconel windings and inhibited Flexicarb graphite, with a high heat shield (on both inside and outside diameters) to protect against “graphite oxidiation”.
The H.O.T. gasket overcomes the problems associated with leakage due to a deterioration of gasket materials at High Temperatures.
| For use in temperatures as high as 1000°C |
| Proven field experience |
| Prevents the ingress of oxygen |
| Contains NO asbestos fibers |
| Uses high recovery Inconel winding strip |
THE BAKER GASKET (PDF)
The Baker Gasket
offers the user the
reliability of a spiral
wound gasket with the
additional back up of an
emissions containment
system should a leak
occur.
Benefits of the Baker
gasket:
| Prevents HF attacking the bolts |
| Early detection of small leaks |
| Containment of HF emissions |
| Improves maintenance |
| Requires no modification to the flanges |
| Designed to suit Class 150 and 300 flanges |
| Contains no respirable fibers |
Complete eCatalog Available For All Nominal Pipe Sizes 75 - 2500 Lb Pressure Class
