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AFlex Hose's Corroflon - Temperature, Pressure and Flow Rates |
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Temperature vs Pressure
The hose liner is
manufactured from hose quality grade PTFE conforming to
FDA requirements 21 CFR 177.1550 and USP Class VI,
extruded in to tube and helically convoluted. It also
includes a heavy gauge Grade 304 stainless steel
reinforcing wire helically wound into the external root
of the convolutions to strengthen the convoluted shape.
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The braid is high
tensile grade 304 stainless steel wire braid to give maximum
protection to the hose against internal pressure and
external abrasion.
The graph below gives
maximum pressure for each size of Corroflon GP,SS hose.
At temperatures less than 0°C, the listed maximum
working pressures apply, down to -70°C. |
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Temperature vs
Vacuum
All sizes of
Corroflon GP,SS up to 2" bore are usable at full
vacuum up too 130°C. At higher temperatures,
the vacuum resistance should be reduced 1% for
every degree above 130°C. For sizes above 2"
bore, the vacuum resistance depends on the bend
radius used. In general, for sizes above 2"
when high/full vacuum resistance is required,
use SP grade.
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Flow Rates
If it is required to
determine the flow rate of a particular hose assembly,
or if it is required to determine the pressure required
to generate a certain flow rate, then this can sometimes
be approximately calculated by the (Corroflon) supplier.
It should be noted
that calculations can only be made for fluids with a
viscosity like water and for hose assemblies with PTFE
lined end fittings (no bore restrictions at the ends of
the hose).
The following
information should be given to the supplier, to
calculate the Flow Rate in Cubic Meters per Hour:
- Pressure in
Bars at the Entry into the Hose Assembly
- Pressure in
Bars at the Exit from the Hose Assembly
- The hose
configuration (roughly straight, 33%, 66% bends or
100% Tightly Coiled)
To calculate the
pressure drop in bars over the length of the hose
assembly:
- Required Flow
rate in cubic meters per hour
- The hose
configuration (roughly straight, 33%, 66% bends or
100% Tightly Coiled).
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