See also Cup Seals on Oxygen and Nitrogen Compressors
The performance and service life of rotary vane motors depends largely on the quality and precision of the blade used.
Different conditions of service are best met by proper selection of long life, low friction materials.
Vesco Plastics has produced non metallic vanes for many years supplying both the original equipment and replacement
markets.
Five different materials are offered according to application requirements, resulting in many times longer vane
life and reduced wear on cylinders, to give far better overall performance on equipment.
Vesconite:
For low friction and long life wear under moderate impact conditions at temperatures up to 110°C/230°F.
Also minimises cylinder wear and is recommended where lubrication is uncertain.
Available in a wide range of sizes, easily machined and well priced.
APPLICATIONS: Air motors, exhausters, blowers, first stage of two stage compressors.
Vesconite Hilube:
An advanced material for lowest friction and outstanding wear life at temperatures up to 110°C/230°F.
Probably gives the lowest cylinder wall wear of any material on the market. Recommended where lubrication is not
possible or uncertain and high equipment life is wanted.
Available in wide range of sizes, easily machined and well priced.
APPLICATIONS: Air motors, exhausters, blowers, first stage of two stage compressors.
Hitemp 150:
Specially formulated for high rigidity, self lubricated, low friction, low wear, good dimensional stability, and
low wear of cylinder walls. A heavy duty material well suited to higher operating temperatures up to 160°C/320°F.
A long life replacement for laminates.
APPLICATIONS: Compressors (first and second stage), vacuum pumps, etc.
Hitemp 230:
A "Space Age" material. High dimensional stability, low friction, self lubricated, relatively high temperature limits
(up to 230°C/450°F) and outstanding wear resistance.
APPLICATIONS: As a replacement for carbon vanes in unlubricated equipment, small compressors and for high temperature
applications.
Polycap 120:
A very tough, low wear traditional material, suitable for temperatures up to 130°C/270°F, rough
conditions and uncritical tolerances.
Dimensional changes are likely under humid conditions.
APPLICATIONS: Air motors, exhausters, blowers.
INDICATIVE PROPERTIES – ROTOR BLADE MATERIALS
| Material |
Colour |
Dry flexural modulus kg/cm² MPa |
Deflection temp at 1.85 MPa |
Coefficient of thermal expansion x 105 mm/mm/°C |
Immersed water absorption 24 hrs |
Guide operating temp limit |
| VESCONITE |
Charcoal |
3,000 |
93°C |
6 |
0.1 |
110°C |
| VESCONITE HILUBE |
White |
3,000 |
117°C |
6 |
0.1 |
110°C |
| HITEMP 150 |
Rust brown |
8,000 |
250°C |
4 |
0.5 |
150°C |
| HITEMP 230 |
Dark brown |
15,000 |
256°C |
2 |
0.1 |
230°C |
| POLYCAP V |
White |
2,800 |
100°C |
9 |
1.5 |
130°C |
GUIDE TO MATERIAL SELECTION
|
Operating Temperature |
Material Recommended |
| Air motors, Exhausters, Blowers
Compressors: 1st stage |
Up to 100°C/212°F
Up to 130°C/270°F |
Vesconite, Vesconite Hilube
Polycap 120 |
| Vacuum pumps
Compressors: 2nd stage (Fibre vane replacement) |
Up to 160°C/320°F
160-250°C/320-480°F |
Hitemp 150, Polycap 120
Hitemp 230 |
| Unlubricated vacuum pumps and compressors (Carbon vane replacement) |
Up to 170°C/340°F |
Hitemp 230 |
INFORMATION REQUIRED WITH ENQUIRIES OR ORDERS:
- Rotor slot width and length
- Width of vane
- Estimated operating temperature
- Existing material
- Type of lubrication available
- Cause of failure (if any) of existing material
- Drawing or sample
- Number of vanes required (per order or per year)
- Equipment type
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