Characteristics:
Silicaid® 306/50 is specially designed Silicone paste dispersion for coating high voltage insulators.
It can be sprayed with airless spray insulations in a very thin layer avoiding brushes and rag applications.
A film of 1-2 mm may give excellent protection for minimum 2 years.
Applications:
For coating high voltage insulators, protecting them against contamination and thus avoiding corona discharge, surface leaking, etc.
Product Properties:
1. As Supplied Supplied as . . . . . . . . . : 50% (v/v) paste
Appearance . . . . . . . . . : Colorless to gray
Viscosity . . . . . . . . . . .: Very tixotropic
Specific gravity (gr/cm3). . : Approx. 1.2
Solvent . . . . . . . . . . . : HCFC+Alcohols or as requested by customer.
2. Silicaid®1010 = The Film on the treated surface
Penetration (unworked) . . . . . . . . : 210 - 260
Penetration (worked 60 strokes) . . . : 310 max.
Service temp. (range °C) . . . . . . . : -57°C to 204°C (for long periods).
Bleed (200°C/30 hours) . . . . . . . : 8% max.
Evaporation (200°C/30 hours) . . . . . : 2% max.
Arc resistance . . . . . . . . . . . . . : 60 seconds min.
Volume resistivity (OHM - cm) . . . : 10 X 1013 min.
Electrical strength (KV - mm) . . . . .: 10 min.
Dissipation factor . . . . . . . . . . . : 0.25% max.
Dielectric constant (50 HZ, 1 KHZ) . . : 2.9 max.
Thermal conductivity (K factor) . . . . : 5 X 10-4
Shelf Life:
Silicaid® 360/50 has a shelf life of minimum 12 months if stored in tightly closed original container.
How to Use:
1. Equipment
- Wagner-Airless 4000H or 7000H with drawing in pipe and high pressure pipe towards the pistol
- Pistol G 20-l (or alternatively 2 pistols)
- Airless convertible nozzle 28 or equivalent.
After a short mixing the material will be pumped directly from its container.
Airless spray should work at 200 bars max.
Spraying at 100 bars, using nozzle 28 at a 30-40cm distance gives the following results:
|
Nozzle opening |
Width of spray |
Coating thickness achieved |
|
1 |
200mm |
0.3-0.4mm |
|
2 |
300mm |
0.5-0.6mm |
|
3 |
400mm |
0.4mm |
|
4 |
0.3-0.4mm |
0.3-0.4mm |
In order to get thicker insulation repeat spraying on the surface until the required thickness achieved.
Safety Instructions:
Although Silicones are particularly inert physiologically and appear to be essentially non-toxic, temporary discomfort may be produced from eye contact with them.
For further information please consult Silicaid® 306/50 MSDS.
Packaging:
Standard: 25kg.
Other sort of packaging can be used in order to meet specific customer requirements.