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Braided PTFE packing T4902
aramidaramid fiberaramid yarn

Braided PTFE packing - T4902 - ULMAN Dichtungstechnik GmbH - aramid / aramid fiber / aramid yarn

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Characteristics

Material

PTFE, aramid, aramid yarn, aramid fiber

Other characteristics

high resistance, chemical-resistant

Applications

for pump, for piston pumps, for the chemical industry, for rotary applications, for high-pressure applications, for harsh conditions, for static applications

Operating temperature

Min.: -100 °C
(-148 °F)

Max.: 280 °C
(536 °F)

Description

Product overview
ULMAN T4902 is braided from aramid filament yarn and impregnated with PTFE. The base material, aramid fibre, provides very high tensile strength and excellent resistance to pressure and abrasion. The packing exhibits minimal wear even under high-pressure conditions.

Application
The packing is suitable for sealing in a wide range of chemically aggressive and abrasive media, as well as in water and steam up to 280 °C. It is applicable in rotary and piston pumps, with primary use in piston pumps, and is suitable for high-pressure and demanding operating conditions. ULMAN T4902 demonstrates extended service life in abrasive media.

Installation note
Due to the high yarn strength, the use of shaft sleeves (sleeved shafts) is recommended to protect the shaft and ensure correct compression and alignment of the packing.

Fields of application

Static
Dynamic
Single acting
Double acting
Linear
Rotating
Oscillating

Main use
Sealing in chemically aggressive and abrasive media, and in water and steam up to 280 °C.

Materials
Aramid filament yarn, PTFE impregnation.

Technical values

Material: Aramid staple fibre / Aramid filament yarn
Pressure rating: 20 dyn. / 150 stat.
Temperature range: -100 °C to +280 °C
Max speed: 15 m/s
pH resistance: 2 - 12

Delivery forms
Standard cross-sections: 4–25 mm square; other dimensions available on request. Specific density: 1.4 g/cm³ ± 10%. Typical packaging weights by cross-section: ≤8 mm – 1 kg; ≤12 mm – 2 kg; ≤16 mm – 4 kg; ≤25 mm – 5 kg.

Characteristics / technical specifications

Model: T4902
Brand: ULMAN
Base material: Aramid fibre (filament yarn / staple fibre)
Impregnation: PTFE
Main use: Sealing in chemically aggressive and abrasive media, water and steam (up to 280 °C)
Pressure rating: 20 dyn. / 150 stat.
Temperature range: -100 °C to +280 °C
Max speed: 15 m/s
pH resistance: 2 - 12
Specific density: 1.4 g/cm³ ± 10%
Delivery cross-section: 4–25 mm square (other dimensions on request)
Typical packaging weights: ≤8 mm: 1 kg; ≤12 mm: 2 kg; ≤16 mm: 4 kg; ≤25 mm: 5 kg