Submittal Sheet

DRESSER
®
Life-time Gaskets
Armored
®
Gaskets
Armored gaskets can be used to great advantage where low
electrical-resistant joints are desired. The armor “bites” into the
pipe providing metal to metal contact allowing easy passage of
current where cathodic protection is a necessity.
The armor–an elastic, practically indestructible brass coil or
helix–is molded into the gasket tip becoming an integral part of
the gasket. When used with the proper grade/compound rubber,
the armor shields the gasket material from the line content
without interfering with the sealing efficiency of the gasket.
Buna N (Grade 42 - Nitrile) Max. Temp. 150°F*
Buna N (Grade 42) gaskets are resistant to oil, most
aromatic and aliphatic hydrocarbons, natural gas fogging oil,
condensates and gasolines.
Buna S (Grade 27) Max. Temp. 212°F*
The compound most generally used for plain gaskets is Buna S
(Grade 27). This gasket has wide applications and is accepted
as standard for most pipeline use. It is recommended for use
on lines transporting both fresh water and salt water, natural
and other gases, air, most acids, alkaline and sugar solutions
and some refrigerants.
Fluorocarbon - Max. Temp. 350°F
Fluorocarbon gaskets are resistant to hydrocarbons, aromatic
hydrocarbons, alcohols, organic acids, nitrogen-containing
compounds, vegetable oils and greases.
Butyl -Max. Temp. 250°F
Butyl gaskets are resistant to hot air service, steam, hot water
and miscellaneous aqueous solutions. They are also suitable
for vegetable oils, organic chemicals, oxidizing acids and
alkalies.
EPDM - Max. Temp. 300°F
EPDM gaskets provide excellent resistant to aging factors
such as ozone, oxygen and elevated temperatures. This
includes service in hot water, steam and dry heat. They are
also suitable for handling popular chemicals such as ketones,
alcohols, phosphate ester hydraulic fluids, glycols, dilute acids
and alkalies.
High Temperature - Max. Temp. 1200°F
These braided flexible gaskets are designed specifically
for the high temperature and abrasive atmospheres
associated with services such as fly ash handling systems.
As a replacement for asbestos, these gaskets are
manufactured of a pure homogenous graphite bonded to
a fiberglass carrier for strength and thermal durability.
The braid over braid construction is die-formed and cut
to length to fit proper coupling configurations resulting in
a uniform tolerance which has proven itself as a reliable
asbestos replacement.
Note: The non-resilient characteristic of this particular gasket
material may result in a non leak-proof seal. This should be
taken into consideration for this application.
WARNING NOTE: Temperature recommendations are
for reference purposes only. Please consult Dresser
Engineering for specific recommendations, product style,
line content, working pressure and temperature ranges.
For SEVERE Service Conditions, see Dresser
Gasket Brochure for complete listing of corrosive
content and gasket recommendations.
Dresser Compounded Rubber Gaskets
Pipe joints must be able to absorb pipe stress caused by
natural forces and natural expansion, contraction, vibration
and deflection while the line is in service. The sealing capabili-
ties and the extreme flexibility of a Dresser coupled joint is
made possible by the resilience of the rubber-compounded
gaskets. Resiliency is the property that enables the gaskets
to maintain pressure against the followers that confine it and,
at the same time, allow for flexibility not found in rigid piping
connections. Without it, a flexible joint is not possible!
Simply put, the absorption of pipeline stress permits each
section of the pipeline to “float” in the joint ensuring a
flexible piping system while avoiding leakage, line breaks,
costly repairs and service interruptions.
*For Dresser Styles 65 & 88 Fittings, the maximum temperature is 150°F