Lamons manufactures high-quality gasketing components for extreme industrial applications. They produce spiral wound gaskets, soft gaskets, ring joints, and other sealing products. Their HTG product family uses flexible graphite protected by mica/phyllosilicate barriers to provide sealing at extreme temperatures up to 1500°F while maintaining torque and tightness through thermal cycling. The flexible graphite maintains its properties while protected from oxidation, making the HTG gaskets the most stable sealing solution for demanding high-temperature industrial applications.

1. Sealing Global - Servicing Local
High Temperature Sealing Components
for Extreme Industrial Applications
HTG GASKETING PRODUCT FAMILY

2. Sealing Global - Servicing Local
Lamons is the market leader in the
manufacture and supply of high
quality gasketing components
including spiral wounds, soft
gaskets, ring joints, CMG gaskets,
kammpros, heat exchanger
gaskets and fasteners. Lamons is
committed to superior sealing
products distributed worldwide in
conjunction with personal,
localized service.
Lamons Gasket Company stocks
and provides the widest selection
of gasketing and bolt materials.
Lamons' sealing solutions are
utilized in every major industrial
market in the world and we are
depended upon daily to quickly
respond to any customer
specification or demand.We meet
our customers' requirements of
size, pressure, temperature, shape
and materials.
Our major manufacturing facilities
are in Houston and Hangzhou,
Zhejiang near Shanghai,with sales
and service facilities located
throughout the U.S. and Canada.
We also have many licensees and
distributors strategically located
throughout the world to provide
our customers with local service,
advanced technical support,
and the widest selection of
gasket materials ready for
immediate delivery.
Our locations feature leading
technology and state of the art
manufacturing facilities capable
of producing engineered sealing
products to precise custom
specifications serving the refining,
chemical, power generatiuon,
and pulp and paper industries.
Extreme Temperature
Lamons HTG
Product Family
Lamons high temperature gaskets represent the ultimate solution for
industrial bolted joints that are exposed to extreme temperature. By
combining the superior sealing performance, impermeability and stability
of flexible graphite with an exceptional oxidation barrier, Lamons HTG seals
represent the best technology available in regards to torque retention and
sealability at elevated temperatures.
The Lamons’ HTG concept utilizes a premium super oxidation inhibited
flexible graphite that is completely shielded from oxidation by barriers of
mica/phyllosilicate. This inhibited flexible graphite is the most oxidation
resistant available on the market and like all homogeneous flexible graphite,
completely maintains its physical and mechanical properties regardless of
temperature exposure. The phyllosilicate barriers consist of Novus Hi-Temp®
material which is a mica/phyllosilicate based sealing material that contains
a very low content of inorganic binder (less than half of the binder found in
vermiculite/phyllosilicate filled sheets). The combination of these two sealing
materials allows the user to maintain the stability and impermeability of
flexible graphite and eliminate the effects of oxidation at extreme
temperatures. Lamons HTG family of products are the most stable and
impermeable gasket materials available for extreme temperatures.
Kammpro-HTG kammprofile gaskets
Lamons Kammpro gaskets are recognized as a problem solver
for heat exchangers, large vessels and equipment that
experience excessive movement due to thermal expansion.
The Kammpro provides one of the tightest seals combined
with superior load bearing characteristics.
WRI-HTG spiral wound gasket
Lamons “SpiraSeal” gaskets are manufactured
using specially fabricated machinery. They are
configured to allow superior resiliency and self-
adjustment when compared to conventional
gaskets. Lamons offers these gaskets in almost
any combination of size, thickness and
component material.
Novus Hi-Temp mica based facing
material and filler material
Premium oxidation resistant flexible
graphite facing material and filler material

3. Novus Hi-Temp Phyllosilicate Sheet
Material for Cut Gaskets
LAMONS
Kammpro-HTG
gasket design
Novus Hi-Temp phyllosilicate
(mica) based oxidation
shielding that blocks oxid-
izers eroding the flexible
graphite at elevated
temperatures
Super oxidation inhibited
flexible graphite to provide
ultimate sealability at
extreme service temperatures
LAMONS WRI-HTG
spiral wound
gasket design
Available in a variety
of designs, sizes and
configurations to adapt
to almost any standard
or specialty application
An absolute minimization
of organic binders that
result in superior torque
retention and tightness
when exposed to
elevated temperatures
Gasket Constants
Kammpro-HTG
“M” – 2.75 / “Y” – 3700PSI
Style WRI-HTG spiral wound gasket
“M” – 3.00 / “Y” – 10000PSI
Temperature Limitations
Cryogenic to 1500F*
*This is a typical maximum value.Higher temperature may be applicable
dependent upon internal pressure conditions and media being sealed.
Contact Lamons Engineering for assistance.The use of high temperature
alloys is recommend for extreme temperatures.
Novus Hi-Temp mica/phyllosilicate
sheet is available as a cut gasket to
perform in extreme temperature
applications where metal reinforc-
ement is not required.
Resistance Solutions
HTG designs can be adapted to any style or size Kammpro or Spiral Wound gasket to
provide performance and protection in extreme temperatures. Both HTG designs
successfully meet the requirements outlined in the modified AP1607 fire test. Test reports
available upon request.

4. Traditional Seal Concepts
Popular compressed non-asbestos gasket exposed to
400°F for a duration of 4 hours. The physical properties
of these materials were severely degraded when
exposed to a fraction of their rating. The structure
turns glass-like and can fracture with slight flexing.
While these materials can still maintain functionality in
most cases, their ability to compensate for thermal
and pressure fluctuations is severely diminished by
heat exposure.
A vermiculite based compressed sheet material that
utilizes aramid fiber and a high content of organic binder
is severely affected by temperature and chemical
attack. A vermiculite material offers no additional
advantage over compressed non-asbestos at elevated
temperatures due to the high organic content.
Flexible graphite that is unprotected from oxidizers and
exposed to the atmosphere will convert to a gas
through oxidation. Flexible graphite that is contained
within a spiral wound element (left) will degrade at a
slower rate than a faced metal core (right) because it
is relatively encapsulated. Total oxidation is inevitable
unless the flexible graphite is sufficiently protected.
A kammprofile with a vermiculite based facing. An
exposure to 1500°F for six hours between flanges
destroys the rubber binder that holds the vermiculite
powder in suspension.
Vermiculite filled spiral wound gaskets utilize organic
binder as a processing aid for the filler. Elevated
temperature degrades the binder and will compromise
tightness and sealability.
Most sealing materials are detrimentally affected by extreme temperature exposure. Many competitive
products utilize a necessary processing aid consisting of an organic rubber binder where an inorganic
material is held in suspension. This low temperature binder begins to degrade, carbonize and embrittle at
temperatures as low as 300°F,resulting in a complete loss of physical and mechanical properties at moderate
temperatures. This rubber binder is susceptible to chemical attack and degradation even in mildly
aggressive services. This degradation inevitably leads to torque loss and leakage. Since the binder is evenly
dispersed throughout the sealing material, a complete loss of physical and mechanical properties is
experienced when exposed to elevated temperature. The mechanical properties that are characteristic of
an effective seal are lost when the rubber binder is subjected to temperature and chemical attack.

5. For assistance with HTG sizing and design, contact Lamons Engineering at
Engineering@lamonsgasket.com
Sealing Global - Servicing Local
Independent TGA weight loss testing illustrating the amount of binder contained within popular high
temperature gasket solutions. Higher binder content corresponds to weight, volume and torque loss
Thermal cycling test data shows very favorable test results for both Lamons Kammpro HTG and a
competitive vermiculite based material at 500 degrees F.
Thermal Cycling data at 800 degrees F is where the difference is significantly illustrated. Organic binder in
the vermiculite based facing is compromised to the point of leakage. The degradation of the binder in the
vermiculite facing results in a loss of the ability to tolerate thermal upsets. The Lamons Kammpro HTG
maintains the flexible graphite’s original resilience and physical properties while protected from oxidizers
by the phyllosilicate barriers.
. . . experience
the difference.
www.lamonsgasket.com • sales@lamonsgasket.com
7300 Airport Blvd. Houston, Texas 77061 USA • Phone (713) 222-0284 • Toll Free (800) 231-6906 • Fax (713) 547-9502 • A TriMas Company
Lamons Kammpro HTG after exposure
to 1500°F – The Flexible graphite maintains
all physical and mechanical properties
after exposure
Lamons WRI-HTG spiral wound gasket after
exposure to 1500°F – Maintaining the proven
and superior sealing characteristics of flexible
graphite creates an ideal high temperature
solution – the flexible graphite is completely
protected from oxidation
Know the facts. . . .

6. Sealing Global - Servicing Local
www.lamonsgasket.com • sales@lamonsgasket.com
7300 Airport Blvd. Houston, Texas 77061 USA • Phone (713) 222-0284 • Toll Free (800) 231-6906 • Fax (713) 547-9502 • A TriMas Company
Houston, TX
(713) 222-0284
Freeport, TX
(979) 265-2100
Beaumont, TX
(409) 838-6304
New Orleans, LA
(985) 785-4160
Baton Rouge, LA
(225) 292-4250
Lake Charles, LA
(337) 882-1681
Boothwyn, PA
(610) 364-1111
Joliet, IL
(815) 744-3902
Rancho Dominguez, CA
(310) 886-1133
Martinez, CA
(925) 313-9080
Bellingham, WA
(360) 733-3831
Sarnia, Ontario
(519) 332-1800
Fort Erie, Ontario
(905) 871-0600
Singapore
65-6466-9340
China
86571-8672-7235
HTG GASKETING PRODUCT FAMILY
Lamons WRI-HTG and Kammpro HTG are the most stable gasket designs
available for extreme temperatures. The utilization of flexible graphite allows
the gasket to maintain torque and tightness through thermal cycling while
providing the ultimate fugitive emissions seal. By utilizing a phyllosilicate
oxidation shielding, the flexible graphite is able to maintain its integrity and
provide freedom from oxidation.