Braided ramie yarn packing T4424

PTFEhigh resistancefor static applications

ULMAN T4424
Description
ULMAN T4424, braided from natural ramie yarn and impregnated with PTFE and oil, is a cost-efficient packing suitable for a wide range of industrial sealing applications up to approx. 140 °C. The combination of materials delivers a balanced mix of flexibility and stability. Its pliable structure ensures optimal conformity to shafts, valve stems and spindles, while the ramie fibre provides durable service life under demanding conditions.

Application
The packing is particularly suitable for pumps handling hot or cold water and performs well in sandy and fibrous media, such as in hydromechanics and the pulp and paper industry. It is also appropriate for seawater use and is frequently applied in shipbuilding and dockyard operations. Its resistance enables reliable operation in media with comparatively high working pressures.

Fields of application

• static
• dynamic
• single acting
• double acting
• linear
• rotating
• oscillating

Main use
Pumps handling hot or cold water, and pumps exposed to sandy and fibrous media, used in hydromechanics and the pulp and paper industry.

Materials
Ramie yarn; impregnated with PTFE and oil.

Technical values
Materials: Ramie
Pressure: 20 dyn. / 100 stat.
Temperature: -50 °C / +140 °C
Speed: 12 m/s
pH value: 5 - 11

Characteristics / technical specifications

• Model: T4424
• Base material: Ramie yarn
• Impregnation: PTFE and oil
• Temperature range: -50 °C to +140 °C
• Pressure rating: 20 dyn. / 100 stat.
• Maximum running speed: 12 m/s
• pH range: 5 – 11
• Main applications: pumps (hot/cold water), sandy and fibrous media, hydromechanics, pulp and paper industry, seawater/shipbuilding and dockyard operations