Teflon Hose Assemblies

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Sanitary Hose Assemblies for Bio-Pharm Applications PTFE vs Silicone. 

Most pharmaceutical process applications have sanitary hose assemblies somewhere in their systems, such as load cell isolators, portable tank hook ups, CIP jumpers or any one of a dozen other applications. Some specifications are common to most pharmaceutical sanitary hose assemblies. They need to be steam sterilizable or autoclavable. They need to have product contact materials that have been tested to meet USP Class VI requirements. Most hose materials that we deal in meet FDA guidelines, but there are only two that meet the pharmaceutical requirements: Platinum cured silicone and smooth bore PTFE (Teflon). Which one is better? It really depends on your application and what you are trying to accomplish.

PTFE Hose Properties

  • The premier PTFE hoses, such as Aflex Bioflex and Pharmaline N have a smooth inner bore and a convoluted outer bore. They normally have a stainless steel braid reinforcement then a cover material such as EPDM or Silicone. This renders them heavier than silicone.
  • Very flexible but great force to bend normally than silicone
  • Higher pressure ratings than silicone
  • Sizes ½” -3” (there are 4” smooth ID PTFE hoses available but they really don’t bend).
  • Normally not gas permeable
  • Excellent chemical resistance

So Which is the Better Hose Choice? Silicone or PTFE?

It is really a function of your application. The cost differential between the two is not particularly significant. If you get into applications above 100 PSI, the PTFE hoses are probably preferred. If you need something light and flexible (short load cell jumpers are a good example) silicone works great. For constant steam applications we normally recommend conductive PTFE hoses. For a hose assembly that it being handled (connected/ disconnected) constantly, PTFE is probable going to hold up better, but will be heavier. For hoses that are in a constant dynamic state (filling machines come to mind), wire reinforced silicone won’t work. The wire work hardens and eventually snaps.   The point of this is that each application is unique. You need to consider several things before specifying the proper hose. Here are the questions we normally ask our clients.  

  • What is the product?
  • What is the process temperature?
  • Give us an overview of the application. Tell us how the hose is going to be used.
  • What is the process pressure?
  • How are you going to clean the hose?
  • What is the cleaning temperature and pressure?
  If you go through all of this, look at hose specifications and still are unsure of what hose to specify, please contact your Sales Representative at Tri-Canada by calling (905) 677-9000 or send an email to sales@tricanada.com.

PTFE Hoses from Rubber Fab Assembled by Tri-Canada

Rubber Fab RFCTLP Teflon Hose:

Convoluted low profile PTFE-lined hose with braided stainless steel cover. CRN is available if requested at time of order.

Rubber Fab RFRT Teflon Hose:

Smooth-bore FEP-lined hose with EPDM rubber cover. CRN is available if requested at time of order.