Rigaku vacuum products
Magnaseal rotary feedthroughs provide long life and maintenance-free operation in high vacuum systems and other critical process applications. Rigaku's leadership in feedthrough technology is widely recognized.
| Rigaku Vacuum Products 7a Raymond Avenue, Suite 4 Salem, NH, 03079 |
email: info@rigaku.com Tel: (603) 890-6001 FAX: (603) 890-6016 |
MagnaSeal features
- No magnetic field in the vacuum: The closed and balanced Magnaseal magnetic circuit produces less than 10 Gauss as compared to >180 Gauss for competitive product. This allows the feedthrough to be located close to magnetic-field-sensitive processes without effect on process.
- High-pressure capacity: 2.5 atmospheres minimum, producing very long life seals. The Magnaseal will continue to seal even if the bearings fail (100% eccentric condition)! The Magnaseal will tolerate high shaft side loads that will cause competitive units to fail.
- High-strength shaft: Three times the torque-transmission capacity of competitive products. Very resistant to shaft breakage or to seal failure due to excessive torque or side loads.
- Seal stages in stator: Shaft diameter is not reduced by seal stages cut in shaft as in competitive product. The seal stages cut into the shaft in competitive product can reduce the effective shaft diameter .08".
- High external magnetic field tolerance: The closed, balanced, high-energy magnetic circuit of the Rigaku Magnaseal will operate reliably in >500 Gauss external magnetic fields without seal degradation versus less than 100 Gauss for competitive product.
- More rugged construction: The compact size of the Rigaku Magnaseal seal element allows larger bearings to be installed than typical competitive product resulting in longer life for the end user.
Vacuum Products application notes
- Ferrofluidics feedthrough primer (PDF file)
- Selection and application criteria for magnetic-liquid-sealed vacuum rotary feedthroughs (PDF file)
- Shaft strength considerations in Ferrofluidic vacuum rotary feedthroughs (PDF file)
- Applying torque to competitor's feedthrough vs Rigaku Feedthrough (PDF file)
- Magnetic field leakage photos (PDF) and demonstration (MPG movie file)
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