These designs of end fittings are used in applications where the end fitting material is not compatible with the fluid passing through the hose, so all internal 'wetted' parts must be protected by a chemically compatible plastic.

The difference between PFA Encapsulated hose end fittings and 'Integral PTFE Lined' hose end fittings is clearly defined:

The severely reduced bore size of the PFA Encapsulated fitting design reduces the fluid flow rates through hose assemblies by up to 75%.

Integral PTFE lined fittings have no bore size reduction, so full-bore flow through the hose assembly is maintained.

This means that the time taken to fill or empty vessels through the assemblies can be considerably reduced by choosing a BIOFLEX or CORROFLON assembly with integral PTFE lined fittings.

The internal design of the PFA Encapsulated fitting also creates a significant entrapment zone behind the inserted end fitting tail.

This makes it difficult during cleaning through to ensure the hose assembly has been cleaned out 100%.

Also, in pharma and food applications the entrapment zone which is created by the PFA Encapsulated fitting design can trap products to provide a bacterial breeding area in some applications.

These problems are completely eliminated by the choice of BIOFLEX or CORROFLON hose assemblies with integral PTFE lined end fittings.

AFLEX HOSE PRODUCTS - BETTER BY DESIGN