Heidolph Pump Heads - Manual (Page 68)

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68
C. RECOMMENDATIONS ABOUT TUBES
10. Tube properties
Designation Standard Food
Hydrocarbons
Advantages
Low-price tube for laboratory
applications, transparent. Ideal
for inorganic media. Only slightly
pervious to gas. Recommen-
dable for viscous media. Good
dielectric properties. Odourless,
nontoxic.
Specially for food. Smooth
inner walls, abrasion-proof.
Neutral to smell and taste.
Easy to clean and dry. Good
dielectric properties.
Specially for hydrocarbons,
natural oil products and
distillates. Ideal for petrol,
kerosene, heating oil, cutting
solutions, glycol-based
coolants.
Limitations
Plasticizers may become
disassociated. Limited life span.
Limited life span. Unsuitable for concentrated
acids and lyes. Plasticizers
may become disassociated.
Use with:
Acids
Lyes
Solvents
Pressure
Vacuum
Viscous media
Sterile media
good
good
unsuitable
good
good
excellent
under certain conditions
good
good
unsuitable
good
good
excellent
good
good
good
under certain conditions
good
good
excellent
under certain conditions
Temperature range
-50 to +70 °C -40 to +70 °C -40 to +70 °C
Physical properties Thermoplastic soft PVC
Transparent
Thermoplastic soft PVC
Transparent
Thermoplastic soft PVC
Yellow translucent
Complies with
standards
FDA21 CFR 177.2600
BASPP and NSF (Standard 51)
USDA Standard
Permeability CO
2
H
2
O
2
N
2
1,7-7,4
97
0,7-12
0,2-3,0
1,7-7,4
97
0,7-12
0,2-3,0
1,7-7,4
97
0,7-12
0,2-3,0
Cleaning/sterilization Can be sterilized with ethylene
oxide or by autoclaving. Wrap
the tube in a non-linting cloth or
in paper and autoclave for 30
minutes at 121°C and 1 bar
(takes on a milky colour). Dry in
air at max. 66°C for 2 to 2 1/2
hours until the tube is clear
again.
Can be sterilized with ethylene
oxide or by autoclaving. Wrap
the tube in a non-linting cloth or
in paper and autoclave for 30
minutes at 121°C and 1 bar
(takes on a milky colour). Dry in
air at max. 66°C for 2 to 2 1/2
hours until the tube is clear
again.
Sterilization not recommended.
Tygon
®
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