TEADIT 25BI

Description:
TEADIT 25 BI is a multidirectionally expanded gasket-tape,
produced from 100 % pure PTFE (Polytetrafluorethylen).
TEADIT maintains a quality and environmental management
system that is certified according to DIN EN ISO 9001 and DIN
EN ISO 14001.
Application areas:
TEADIT 25 BI – due to its excellent malleability – is particularly
well suited to compensate for irregularities or damages on the
sealing areas, as well as for all stress-sensitive joints.
A special manufacturing process results in almost equal tensile
strength in both the longitudinal and cross direction. As a result
of this, the material does not change its width under
compression. This is in stark contrast to normal expanded PTFE
tapes!
TEADIT 25 BI, because of this property, is extremely well suited
as a gasket material for narrow sealing areas and in all
applications where a defined gasket width (under load) is
required. Typical applications are enamelled and glass flanges,
heat exchangers, large flanges and containers, pressure vessels,
suction filters and strainers, etc.
Technical data:
• PTFE Temperature range: -268 °C to +260 °C
(short time +315 °C)
• Chemical resistance: chemically inert against most substances
(pH 0 – 14), including the most aggressive acids and lyes. The
only exceptions are molten alkali metals and elemental fluorine
at high temperatures and high pressure
• Ageing: TEADIT 25 BI does not age and can be stored
indefinitely. (Please note: the adhesive tape has limited shelf life)
• Minimum stress to seal Qmin/L (EN 13555 HE, 40 bar)*
L[mg/s*m] 10ˉ² Qmin/L [MPa] = 23
L[mg/s*m] 10ˉ³ Qmin/L [MPa] = 31
* tested with 2.0mm thickness
• Recovery (ASTM F36): 10 %
• Compressibility (ASTM F36): 70 %
Typical application range:
• Temperature range: -60 °C up to +230 °C
• Operating pressure: from vacuum to 40 bar
For details on applications with higher temperatures and /
or pressure please contact TEADIT application engineering!
Tests & Approvals:
• FDA & EC 1935/2004 & EU 10/2011 (all incl. adhesive)
• TA-Luft

• WRAS

Advantages:
• quick and simple installation, no cutting or punching
necessary
• the used gasket can be easily removed without leaving
any deposits on the sealing areas
• excellent malleability makes the repair of minor
damages and irregularities unnecessary
• extremely versatile because of exceptionally good
chemical and thermal stability
• there is less danger of choosing the wrong gasket
material because TEADIT 25 BI can be used for most
applications within the plant
• longer gasket life (less downtime)
• no material waste
• low stock cost

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