DESIGN HELP
Design Help for Successful Shielding and Sealing
Finding an EMC gasket solution such as an O-ring is not the only thing to consider in order to ensure optimum shielding/sealing for your unit. There will be many factors which will affect how well the unit is shielded/sealed and we are always available to offer recommendations on how best to do this. Below are some general points to get you started:
GENERAL
- IP67+ requirements should have a minimum of 50mm fixing space (centre to centre)
- Cover should be thick enough to combat bowing
- Corrosion potential should be given careful consideration
- A review of potential contaminants is necessary to ensure the correct material is used
- Solid sections should not be compressed more than 35%
EXTRUSION
- The thinnest extrudable wall section is 0.35mm, but material choice will be reduced as our range of softer materials cannot be used
- When sealing to IP67+, jointing of the product will be necessary to achieve requirement
- Grooves should be designed to avoid over compression of the gasket and groove overfill
- Developed lengths of O-rings should be calculated by including a maximum stretch of 1.5% to avoid assembly issues
PRINTING
- Gaskets can be printed direct to hardware covers and units providing they are flat and not higher than 50mm tall
- A surface finish of 1.60 - 3.20µ should be used on metalwork that is to have a direct print to hardware, to aid bonding
- Printed gaskets can be entirely backed with conductive Pressure Sensitive Adhesive (PSA), if required
SPECIALISTS IN EMC SOLUTIONS
