The Fluorinated Polymer are widely appreciated for their remarkable
chemical inertness and their excellent resistance to ageing.
POLYVINYLIDENE FLUORIDE (PVDF) offers the specific advantage of easy
processing in accordance with all the convection methods used in the plastic
industry. PVDF, polymerized, according to its own special process, offers a
high degree of crystallinity to that by other processes, resulting among
other things, in superior thermomechanical properties.
The intrinsic technical superiority is one of the reasons for the success
which PVDF has achieved on the world market for more than 20 years.
- Easy processing by : extrusion, injection, compression,
rotational moulding, blow moulding etc.
- Chemically inert to most acids, aliphatic and aromatic organic
solvents, alcohals etc.
- Very high purity.
- Excellent mechanical properties over a wide range of temperatures
: tensile yield strength up to 55 MPa at 23°C and 10 MPa at 150°C.
- Abrasion resistance comparable to that of polyamides, and
relatively low coefficient of friction.
- Continuous use at temperatures as high as 150°C for the
homopolymer grades (without mechanical stress).
- Excellent thermal aging resistance : tensile yield strength
retention over 90% after 25,000 hours at 150°C in a ventilated
oven.
- Unaffected by UV (>232nm) and good resistance to gamma
radiation.
- Excellent intrinsic fire resistance.
- Very easily joined by welding and good capability for
thermoforming.
- Physiologically harmless and approved for contact with food
products (FDA).
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Pump Casing Linear & Armour
PVDF liner is completely encapsulated in the metal armour (shell). All
sealing points are metal supported and "flowing" of the PVDF is
thus limited. The robust armour absorbs all the loads in the system and from
the suction.
Slide in Unit
Pump without casing with semi-open PVDF impeller and solid injection
moulded PVDF back plate.
Shaft Sealing
External mounted teflon bellow-type single mechanical seal and high alumina
ceramic stationery sealing face.
| Technical
Specifications : |
