Spira-Shield patented spiral
The Spira-Shield patented spiral is the basis for all of our unique high shielding EMI gasketing solutions. The spiral is wound out of spring temper beryllium copper for excellent spring memory and compression set resistance. The spiral is tin plated for superior conductivity and shielding properties. The edge plated version exhibits excellent corrosion resistance against aluminum when exposed to humid or salt-fog environments.
This high-shielding gasket is well known for solving shielding problems that no other gasket can solve, and is perfect for military and aerospace projects. However, the cost is competitive enough that this gasket is also perfect for many commercial applications that require high-shielding.
MATERIALS
Spiral: Tin/lead plated beryllium copper. (See Options for RoHS compliance). Electroplated, 90% tin, 10% lead (edges unplated).
Cord: 80 durometer PVC (hard plastic) optional, may require additional lead time.
SHIELDING QUALITY
This gasket offers shielding quality up to 165 dB. The shielding quality may vary depending on your specific application.
COMPRESSION FORCE
Spira-Shield gaskets come in three different resiliencies (as shown below). Optimal compression of the gasket is 25% of the diameter of the spiral. Since the force to compress the gasket is a function of the cube of the thickness of the beryllium copper ribbon, the compression forces shown are approximate.Standard Force: ~30 pounds per linear inch compression.Moderate Force: ~10 pounds per linear inch compression.Low Force: ~1.5 pounds per linear inch compression.
MOUNTING
This gasket is groove mounted.
