If in doubt, contact Proflex Hose Limited for advice on which fluids and gases require the anti-static grade.
CERTIFICATION
Hose and hose assemblies can be supplied with full certificates
of conformity together with test and materials certificates.
If these are required, please state on the enquiry and
order.
Convoluted
PTFE Specification |
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Technical Specifications
Convoluted PTFE
Polytetrafluoroethylene (PTFE) is a fluorocarbon plastic with outstanding
chemical resistance, a very low coefficient of friction and properties
that allow its use in high continuous use temperatures.
DESIGN AND PURPOSE
This is a convoluted PTFE lined hose, with excellent flexibility
in bore sizes from 3/8”, to 2”. It is designed
for use in a wide variety of general purpose applications
such as automotive, steam transfer, refrigeration and
other applications where the temperature resistance,
chemical resistance and ease of cleaning of the PTFE
liner are necessary requirements.
CONSTRUCTION
Stainless steel braid has a liner tube made from
convoluted, extra flexible grade PTFE, with an outer
stainless steel wire braid reinforcement.
Polymer Braid has a braid made from orange
polypropylene monofilaments, making it lightweight
with excellent chemical resistance, but is
not usable at temperatures above 100°C (internal).
Maximum working pressures must be reduced to 50%
of the pressures listed for Visiflon SS.
Tube-only has no braid. It is very lightweight, and the
tube is semi-transparent. It is only usable at low
pressures (less than 2 Bar).
The three grades specified above are
available with an anti-static (black) PTFE liner tube instead
of the natural 3 (translucent) PTFE liner tube.
The anti-static hose grade is required when fluids with a
high electrical resistance, such as solvents or fuels, are
passed through the hose. The electrical resistance
between the inner surface of the hose liner and the end
fittings is less than 107 ohms, permitting dissipation of
any static charge, in accordance with BS2050:1978.
HOSE ASSEMBLIES
Hose can be supplied without end fittings attached for distributors
to assemble
themselves using either conventional hydraulic fittings or short
tail (PTFE) fittings. The convolutions are easily opened out to
the spigot tail diameter by screwing in a (supplied) special
tool (without the application
of heat) after which the spigot can be inserted. Alternatively,
complete hose assemblies can be supplied.
All conventional types of hose end fittings can be fitted to Visiflon
hose
assemblies. Hoses can also be supplied with ends ‘cuffed’ for
customers to fit themselves.
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