Gasket-O Type
RF Waveguide Gasket ensures reliable sealing and electrical continuity between waveguide flanges. Essential for maintaining low leakage and stable RF performance in microwave systems, radar equipment and satellite communication hardware.
High-Performance O-Type Gaskets for Hermetic Waveguide Sealing
AO Microwave’s precision O-type gaskets (circular O-rings) are designed to provide a secure environmental and pressure seal inside waveguide flange grooves. Fabricated from premium elastomer compounds—such as high-resiliency fluorosilicone, silicone, and conductive elastomers filled with silver-plated aluminum or nickel-graphite particles—our O-type gaskets deliver an exceptional gas-tight barrier alongside robust electromagnetic interference (EMI) shielding. Operating across standard bands, these circular gaskets support waveguide pressurization up to 30 PSI, preventing moisture ingress and protecting sensitive internal active components.
By establishing a reliable seal, our O-type gaskets prevent environmental degradation in outdoor satellite up/downlinks, marine radar systems, and pressurized telecom installations. They maintain consistent physical elasticity and electrical contact across a wide temperature range, ensuring long-term system protection.
| Part No | Waveguide Type | Dimension (φDXφd)/mm | Material |
|---|---|---|---|
| AO284-MFO | WR284 | 101X5.4 | Silicon 70deg Shore |
| AO229-MFO | WR229 | 82X5.4 | Silicon 70deg Shore |
| AO187-MFO | WR187 | 68.5X3.5 | Silicon 70deg Shore |
| AO137-MFO | WR137 | 53X3.5 | Silicon 70deg Shore |
| AO112-MFO | WR112 | 40X2.6 | Silicon 70deg Shore |
| AO90-MFO | WR90 | 33X2.6 | Silicon 70deg Shore |
| AO75-MFO | WR75 | 28X2.6 | Silicon 70deg Shore |
| AO62-MFO | WR62 | 23.5X2.6 | Silicon 70deg Shore |
| AO51-MFO | WR51 | 20X2.4 | Silicon 70deg Shore |
| AO42-MFO | WR42 | 15.5X1.8 | Silicon 70deg Shore |
| AO34-MFO | WR34 | 14X1.8 | Silicon 70deg Shore |
| AO28-MFO | WR28 | 10.5X1.8 | Silicon 70deg Shore |
Managing Compression & Sealing in Flange Grooves
Gaskets require proper compression to establish a secure seal inside waveguide flange grooves. O-type gaskets must be compressed enough to fill the microscopic surface irregularities of the mating flanges without being crushed.
If the gasket is overtightened, the elastomer can exceed its elastic limit, causing permanent deformation (compression set) and potential physical failure. If undertightened, gas can leak from the run. AO Microwave's O-type gaskets are designed with high resilience and matched to standard flange groove depths, ensuring a reliable, long-lasting seal under standard assembly torque.
Target Applications & Operational Advantages
By providing hermetic and pressure sealing, our O-type gaskets deliver critical protection in active systems:
Pressurized Satellite Feed Networks
Function: Seals dry nitrogen or SF6 gas inside the waveguide runs of satellite earth stations.
Advantage: Supports pressurization up to 30 PSI, preventing voltage ionization and arcing under high transmit power levels.
Marine Radar Installations
Function: Seals waveguide flange joints against saltwater spray, rain, and humidity on sea vessel masts.
Advantage: High-resiliency silicone and fluorosilicone compounds resist corrosion and ozone, maintaining sealing performance in humid climates.
High-Shielding Military Transceivers
Function: Provides concurrent environmental sealing and EMI shielding at waveguide-to-housing interfaces.
Advantage: Conductive elastomer filled with silver-aluminum or nickel-graphite particles provides shielding effectiveness of >100 dB, preventing RF leakage.
Gasket-O Type FAQs
Need high-integrity O-Type Gaskets?
Specify your WR size, material (Silicone/Fluorosilicone/Conductive), sealing pressure, and quantity — we'll quote in 24 hours.
