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SSI is #3919 on the
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WSDWTF 2008
WSDWTF 2008 show at Intex Shanghai & Shanghai Mart show from April 27-29 Booth # 1B63
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SEE US AT IFAT 2008,Hall A3 and Stand #417
PTFE
 

PTFE EPDM


PTFE Replaces EPDM

In municipal wastewater plants, dairies, carbonated beverage factories, and in pulp and paper mills, SSI's PTFE membranes have been proven since 2004 to improve fouling resistance to such an extent that cleanings are in most cases such that cleaning frequency is reduced by a factor of 5 to 10 as compared to standard EPDM membranes from the industry's leading manufacturers. SSI PTFE has replaced EPDM, silicone and polyurethane tube membranes, and EPDM disc membranes from a number of different manufacturers, including our own EPDM products which are well accepted as being among the best in the business.

PTFE Disc Membrane

Besides reducing maintenance, the thin film PTFE surface layer acts as a barrier layer to protect the EPDM or other substrate material from damage due to exposure to solvents, fats and greases which have caused traditional EPDM membranes to creep, lose weight and chemically oxidize.

And by reducing the amount of foul ants that can accumulate on the membrane surface, SSI diffusers with PTFE layered membranes are much more likely than conventional diffusers to retain their initial efficiency and headloss. Research from UCLA researchers Prof. Michael Stenstrom and Dr. Diego Rosso has proven that particularly in plants with short MCRT, the drop-off in SOTE as a result of fouling is quite significant during the first two years of operation of the diffuser.

The net result of SSI PTFE layered membranes is a longer membrane life, with less maintenance and higher operating efficiency throughout the diffuser's lifetime.

The success of our PTFE diffusers will cause a paradigm shift in the industry. No longer will comparisons of diffusers be made primarily based on initial clean water efficiency, but now towards predictive short and medium term in-process trials in which the fouling resistance of a membrane is considered. Though the initial efficiency of SSI's PTFE membranes is among the top tier in the industry, we nonetheless welcome such a shift.

Benefits of PTFE Membranes:

  • Competitive SOTE
  • Resistance to fouling and calcium scaling
  • Extended life
  • Outstanding chemical resistance
  • Outstanding resistance to fats, oils and greases
  • Outstanding resistance to hydrocarbons, fuels, and solvents
ptfe membrane

PTFE Membrane Diffusers

 
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