Braided PTFE packing T4441

acrylic fiberchemical-resistanthigh resistance

Product overview
ULMAN T4441 is manufactured from acrylic yarn impregnated and sealed with PTFE and a special lubricant. This combination provides balanced chemical resistance, dimensional stability and favorable sliding properties across a wide range of media. Compared with natural-fibre packings (hemp, cotton, flax), ULMAN T4441 offers improved thermal resistance and extended service life.

Application
T4441 is a versatile gland packing particularly effective in pumps under steady pressure. Its flexible structure compensates for slight radial shaft deflections to ensure consistent sealing. Typical applications include chemical, pharmaceutical and food industries as well as general process engineering; suitable for sealing water, steam (application guidance up to approx. +200 °C) and numerous chemical media.

Fields of application (functional areas)

• Static
• Dynamic
• Single acting
• Double acting
• Linear
• Rotating
• Oscillating

Main use
Chemical, pharmaceutical and food industries, and general process engineering.

Materials
Acrylic yarn impregnated and sealed with PTFE and a special lubricant.

Technical values
Acrylic. Pressure: 20 dyn. / 50 stat. Temperature (technical): -150 °C / +280 °C. Application guidance for steam sealing: up to approx. +200 °C. Speed: 10 m/s. pH range: 2 – 12.

Delivery forms and density / weights
Delivery forms: square cross sections 4–25 mm; other sizes available on request. Specific density: 1.3 g/cm³ ± 10%. Standard packing weights by cross section: up to 08 mm – 1 kg; up to 12 mm – 2 kg; up to 16 mm – 4 kg; up to 25 mm – 5 kg.

Characteristics / technical specifications

• Model: T4441 (acrylic packing impregnated with PTFE and lubricant)
• Brand: ULMAN
• Material: acrylic yarn, PTFE-impregnated, lubricant sealed
• Main use: chemical, pharmaceutical, food industries, general process engineering
• Pressure rating: 20 dyn. / 50 stat.
• Temperature (technical): -150 °C to +280 °C (steam up to approx. +200 °C in application guidance)
• Maximum speed: 10 m/s
• pH range: 2 – 12
• Delivery forms: square cross sections 4–25 mm; other sizes on request
• Specific density: 1.3 g/cm³ ± 10%
• Standard packing weights: up to 08 mm – 1 kg; up to 12 mm – 2 kg; up to 16 mm – 4 kg; up to 25 mm – 5 kg
• Compared with natural fibres: better thermal resistance and longer service life