SNOW SHIELD
Passive
Now
UL
Listed
(cULus)
Heated
The Snow shield is designed to prevent
snow and ice from accumulating on satellite
Earth Station Antennas, ranging in size from
0.6 meters to 5 meters in diameter.
The passive snow shield system (US patent
5,729,238, additional patents pending)
consists of a PTFE coated GOR-TEX®
Fabric cover stretched over the reflector.
This PTFE coating has the lowest
coefficient of friction of any solid material,
which makes it difficult for the snow and
ice to adhere to the surface. Because of
this PTFE coating, under most conditions,
snow simply slides off the cover.
The Snow Shield PTFE coated GOR-TEX®
Fabric covers are made from Radome
material that will survive harsh chemical
and extreme environmental conditions while
providing the lowest transmission loss
among all Radome materials.
The GOR-TEX® Radome material will not
tear, shrink, stretch or swell; and is
guaranteed to EXCEED 5 years fabric life.
These covers are lightweight, portable,
resistant to weather and harsh environments.
The fabric is inert and unaffected by the
sunlight, UV or ozone.
For applications where the weather
conditions are more severe, or high
availability of the link is required, W.B.
Walton Enterprises offers a wide selection
of heaters, that will force hot air between the
Snow Shield and the antenna. This will
remove the existing snow/ice that can
accumulate under the right conditions, and
will prevent any additional accumulations.
Key Features
1. Passive System protects the
antenna from the elements and
prevents snow accumulation under
most weather conditions.
2. Heat can be added without having
to replace the existing snow shield
for more severe weather conditions
or high availability links.
3. The Snow Shield Cover material is
Inert and unaffected by sunlight,
UV or ozone.
4. The Snow Shield Cover material
will not tear, shrink, or swell; and
is guaranteed to EXCEED 5 years
fabric life.
5. Lightweight and portable.
Please also see the W.B. Walton Heaters
Data Sheet and Controls Data Sheet for
additional information on heated systems.
W.B. Walton Enterprises, Inc
6. cULus Listed
DE-ICER Air Heater 29KI
1.2kw, 1.7kw, 4kw, 6kw and 12kw
www.de-ice.com/contact
Snow Shield Material Physical Properties: GORE-TEX® Membrane/GORE-TEX® Fiber Fabric Radome Laminate.
LAMINATE TYPE: RA 7943
•
Chemical Consistent: 100% fluoropolymer
•
Construction: Two layers composed of GORE-TEX® membrane (heavy duty) laminated to woven GORE-TEX®
fiber fabric
•
Weave Type: 2 X 2 Basket weave
•
Mullen Burst (typical) 5515.8 kN/m2/800PSI
ASTM D-3786
•
Weight: (typical) 515 gr/m2/15 oz/yd2
•
Breaking Load: (typical) cross machine direction 53 kN/m / 300 lbs/inch, Machine direction 61.3 kN/ 350 lbs/inch
ASTM D-1682
•
Nominal Thickness: 0.36 mm / 0.014 inches
•
Thread Count: Cross machine direction 35 cm-1 / 90 inch-1, machine direction 35cm-1/90 inch-1
•
Air Permeability: 0
STRENGHT CHARACTERISTICS
•
Mullen Burst Strength > 800 PSI, Breaking Load Strength > 350 PSI, Water Entry Pressure > 30 PSI
MECHANICAL CHARACTERISTICS
•
Light Weight (15oz/sq yd), form fitting. Material will NOT tear or swell and is guaranteed to EXCEED 5 years
fabric life
CHEMICAL CHARACTERISTICS
•
Oil repellent, Water repellent, UV resistant, Chemically inert, Resistant to acids, Bases, Solvents, Paints, Fungus,
Corrosive Reagents, Grease, Oils, and Salt Spray (2000 hours), Non-fading per ASTM D 2244-89
TEMPERATURE CHARACTERISTICS
•
Range: -3500 F to 5500 F (-2120 C to 2880 C)
•
Non Flammable per UL 94V-0
Electrical Characteristics of the GORE-TEX® Fabric:
Tested Per Fourier Transform Spectrometry
0 .1 5 d B
0 .0 8 d B
0 .0 4 d B
0 .0 2 d B
0 .0 0 d B
1 G H z.
2 G H z.
4 G H z.
6 G H z.
1 0 G H z.
2 0 G H z.
4 0 G H z.
6 0 G H z.
1 0 0 G H z.
Transmission loss vs. Frequency
(Er – 1.55, tan x = .005 t = .012”)
W.B. Walton Enterprises, Inc
www.de-ice.com/contact