Thermionics RNN-150 Series Rotary Seals

RNN Series Rotary Seals: Offering 360° continuous rotation through UHV system walls, these differentially pumped seals feature two stages of isolation using graphite-impregnated Teflon seals. Preloaded ball bearings ensure precise rotation.D. with larger sizes available upon request. Key features include bakeability to 150°C, tapped flanges, and base pressures in the 10-11 Torr range. Performance specifications include resolution, repeatability, backlash, and readability. Payload capacities vary by model, with maximum loads ranging from 54 to 430 lbs. Custom applications and special sizes are available upon consultation with the factory.

• Rotary Freedom in UHV Systems: RNNs offer 360° continuous rotation through vacuum walls, featuring two stages of differential pumping isolated by graphite-impregnated, expanded Teflon seals on specialized surfaces, and a preloaded ball bearing set for precise stage positioning
• Size Variety: RNNs are listed with inner diameters up to 12 inches, with larger sizes available upon request, demonstrating excellent performance in special applications
• Standard Sizes: Models are available with clear inside diameters ranging from 1.53 to 12 inches, with larger sizes accommodated upon request
• Heat Resistance: RNNs can withstand baking up to 150°C, ensuring durability in various applications
• Flange Configuration: Equipped with stationary and rotating flanges that are tapped for secure mounting
• Compact Design: The thickness of RNNs is approximately that of two ConFlat-type flanges, making them suitable for space-constrained environments
• Differential Pumping: RNNs feature two stages of differential pumping for efficient pressure control
• Pressure Range: Base pressures in the range of 10^-11 Torr are achievable with RNNs
• Scaling and Readout: RNNs come with a standard 360° scale and Vernier for precise measurement, with a resolution of less than 0.004
• Standard Scale and Counter: RNNs have a standard scale of 1.0 and a mechanical counter with 0.1 resolution
• Motor Drive for Maximum Resolution: A microstepped motor drive is required for achieving the highest resolution in RNNs
• Fine Adjustment Drive: RNNs offer a fine adjust worm drive for precise angle adjustments
• Digital Readout for Fine Adjustment: RNNs provide a digital readout on fine adjust, with 0.1 readout, mechanical, and non-resettable functionality
• Mechanical Counter Option: RNNs offer a mechanical counter option for users who prefer manual readouts
• Customization Options: RNNs with /FA units offer custom pumpout tube lengths and crank shaft lengths for tailored applications