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Dresser Life-Time Gaskets
| Grade 27 (Buna S Blend) |
| The compound in most general use for plain
gaskets is Grade 27. This gasket has wide application
and is accepted as standard for most pipeline use. It is
recommended for use on lines carrying natural and other gases,
air fresh and salt water, most acids, alkalines and sugar
solutions, and some refrigerants. Maximum temperature is
212º F.*
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| Armored Gaskets |
| The armor, an elastic, practically
indestructible brass coil or helix, is embedded in the gasket
tip so as to become an integral pat of the gasket. When
used with proper grade/compound rubber gasket, the armor
shields the gasket material from the line content, but in no
way interferes with the sealing efficiency of the
gasket. Armored gaskets can be used to great advantage
where low electrical resistance joints are desired, since
armor bites into the pipe and provides metal to metal contact
for easy passage of current, a necessity where cathodic
protection is to be applied.
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| Grade 42 (Buna N Blend) |
| Grade 42 gaskets are resistant to oil, most
aromatic and aliphatic hydrocarbons, natural gas fogging oil,
condensates and gasolines. Maximum temperature is 150º F.*
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| Fluorocarbon |
| These gaskets are highly resistant to
hydrocarbons, aromatic hydrocarbons, alcohols, organic acids,
nitrogen-containing compounds, vegetable oils and
greases. Maximum temperature is 350º F.
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| Butyl |
| 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. Maximum temperature is 300º F.
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| High Temperature Carded Glass |
| Non-asbestos gaskets are specifically designed
for the high temperature and abrasive atmosphere associated
with services such as fly ash handling systems. As a
replacement for asbestos, these gaskets are manufactured from
rubber coated, wire inserted, carded glass cloth, blended with
a high temperature binder, and graphite coated.
Proprietary lubrication and treatment prior to die forming
results in a uniform close tolerance, high quality,
non-asbestos gasket which has proven itself a reliable asbestos replacement. Maximum temperature is 1200º F.
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| NOTE: Temperature recommendations are for
reference purposes only. For specific recommendations,
consideration of product style, line content and temperature
ranges should be submitted to the Dresser product engineering
department.
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| * For Styles 65 and 88, maximum temperature is 150º F. |
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