Differentially Pumped Rotary Seals
Differentially pumped rotary seals provide 360º of continuous rotation through the vacuum wall of a UHV system. They have two stages of differential pumping isolated by graphite-impregnated, expanded, Teflon seals on special sealing surfaces. A pre-loaded ball bearing set accurately controls the rotating stage position, allowing the unit to be successfully used with manipulators and other precision positioning devices. For easier and more accurate angle adjustment, a worm drive fine adjust option is available. Rotary seals are also available with an anti-backlash stepping or synchronous motor drive. Sizes up to 4 inch (101.6mm) ID are standard, while larger sizes are available on request.
Differentially Pumped Rotary Seals Features
- Flanges: CF, tapped holes, one rotational and one stationary
- Maximum bakeout of 150°C
- Motion: 360° rotation, two stage, differentially pumped with 360° Vernier scale
- Options: fine adjust worm drive “-W”, digital counters, stepper motors and other sizes available
- Vacuum range of ≥ 10⁻¹¹ mbar (UHV)
Nor-Cal Products, Inc dba Pfeiffer Vacuum Valves & Engineering offers the researcher complimentary devices for sample transfer and positioning in ultra-high vacuum systems. Combined with our vacuum chambers, load locks, gate valves, all-metal valves, feedthroughs, viewports, and roughing accessories, we can provide a complete turn-key research system. Each standard component can readily be customized to meet our customer’s specific requirements, such as sample heating and cooling, special lengths, or stepper motor drivers. PV V&E's sample transfer and manipulation devices are made from the highest quality materials and lubricants to withstand repeated UHV bakeouts.