AFlex Hose's Bioflex - Temperature, Pressure and Flow Rates

Temperature vs Pressure
Due to its extremely strong construction, Bioflex has an outstanding resistance to temperature and pressure, much higher than that of conventional convoluted PTFE lined hose.

Maximum Working Pressure (MWP)
Variation with Temperature - Hose with PB Braid, pressure (as listed on the Size Range & spec sheet) from -30ºC to +80ºC and 50% less from 80ºC to 100ºC.

Hose with RC, FP and SI grades as per Graph, BUT only within the temperature range for the particular grade of rubber cover, as given below.

Maximum Operating Temperature  (Internal Fluid Only)
(Subtract 20ºC from the above maximum temperature limits if the temperature is external to the hose)

Temperature vs Vacuum
All sizes of Bioflex GP,SS and AS,SS are usable at full vacuum to 130ºC.  Above this, the vacuum resistance should be reduced by 1% for every degree above 130ºC.

Rubber covered grades the same, BUT ONLY within the temperature limits for the type of rubber.

Flow Rates
In practice, flow rates will vary with hose flexing, fluid viscosity, end fitting design and other parameters, but Bioflex hose flow rates are always around 2 times better than convoluted PTFE hose, when comparing hose assemblies with PTFE lined (non bore-restricted) end fittings.

Bioflex Hose - Flow Rate Calculation
If it is required to determine the flow rate of a particular hose assembly, or it is required to determine the pressure required to generate a certain flow rate, then this can sometimes be approximately calculated by the Bioflex Supplier.

It should be noted that calculations can only be made for fluids with a viscosity equal to water and for hose assemblies with PTFE lined end fittings (no bore restrictions at the ends of the hose).

The following information is required by the supplier to calculate the Flow Rate in Cubic Meter per Hour

• Pressure in Bars at the Entry into the Hose Assembly

• Pressure in Bars at the Exit from the Hose Assembly

Subtracted to calculate Pressure Drop over the Hose Length
OR  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, or 33% Bend, or 66% Bends or 100% Tightly Coiled)

Non Whistling
The 'whistling' noise created by turbulent flow when steam or other gases are passed through a convoluted hose are completely eliminated when using Bioflex.