PTFE Gaskets with TFM Inner Eyelet & Pre-comp edge

PTFE Gaskets with TFMTM Inner Eyelet & Pre-comp. edge

Multidirectional Oriented Ptfe | Ws 7745 HB

UNIFLUOR® ePTFE gasket WS 7745 HB was deve loped for the use in stress-sensitive flange connections and consists of: UNIFLUOR® ePTFE gasket [low density] with inner eyelet, made from sintered, almost non-porous 3MTM DyneonTM TFMTM WS 7110 [high density]. The inner eyelet increases the diffusion resistance and reduces a possible permeation significantly. The gasket is highly pre-compacted on the outside to ensure that the occurring stresses can be reduced as much as possible in order to reduce the pre defor mation forces. The sealing system is characterised by extremely low leakage rates, very low surface pressures and complies with the highest requirements in pro¬cess purity.


  • 100 % pure, virgin PTFE, without fillers, no colouring or stamping ink
  • High longitudinal and cross strength; extremely low cold flow and a very high pressure stability
  • Low setting behaviour, only minimal width increase under load
  • Very good media resistance with the exception of liquid alkali metals and some flourine compounds
  • PTFE is physiologically harmless for continuous operation temperatures up to 260 °C as per BG no. 21
  • FDA-conform and complies with regulations in Europe and Asia for food use
  • Anti-adhesive surface
  • UV- and ageing resistant, no embrittlement
  • Complies with TA Luft 2002 [VDI 2440/2200] leakage requirements
  • Good non-stick characteristics
  • Excellent [di]electric properties
  • Prime elasticity


  • Non-metallic gaskets for pipeline flanges, device and container flanges, pumps and valves
  • Broad range of applications primarily in the chemical and petro- chemical sector
  • Use in food sector and pharmaceutical production
  • Suitable for the use in oxygen applications
  • Sealing of stress-sensitive materials such as enamel, FRP, glass, ceramic
  • Suitable as sheet material for punching and on-demand cutting [all shapes] for repairs and revisions
  • For designs with inner eyelets, used for increased requirements for cleanliness and blow-out resistance [technical tightness]

Product Range
Technical delivery conditions as per DIN 28091

  • Dimensions: 1500 x 1500 mm [standard format]
  • Available thicknesses: 0.5 to 6.0 mm [9 mm upon request]
  • Dimensions:
    • for steel/stainless steel flanges as per DIN EN 12560-1 or ASME B 16.21
    • for plastic flanges FRP, sight glass, enamel etc., following the design specification, upon request
    • Non-standard sizes
  • Made from:
    • UNIFLUOR® WS 7745
    • UNIFLUOR® WS 7745 IB, gaskets with TFMTM-inner eyelet [WS 7110], standard thickness 2.0 mm
    • UNIFLUOR® WS 7745 HB, gaskets with TFMTM-inner eyelet [WS 7110], pre-compressed edge, standard thickness 2.0 mm

Additionally: IDT Profile Overview I FD Series
Additional Designs

  • UNIFLUOR® ePTFE-sealing tape MultiTex®-FG [WS 7770]

ePTFE Unifluor Sheets & Gaskets datasheet

Sealmax has now tied up with KWO and IDT Germany for marketing their product range in India