Edwards STP-1003 5 Axis Magnetic Bearing Turbomolecular Pump, ISO200F Inlet, KF40 Inlet YT390Z001

The STP series pump is a series of a magnetically-levitated turbomolecular pumps

Featuring the following:

• Oil free
• Low vibration
• High reliability

The STP pump is configured so that rotor blade and stator blade are aligned alternately in the axial direction. Gas molecules are pumped from the inlet port to the outlet port by the high speed rotation of the rotor. Rotor blade is supported by the magnetic bearing without mechanical contact. Therefore, the STP pump requires no lubrication oil unlike conventional turbomolecular pumps using ball bearings. The magnetic bearing consists of 5 pairs of active magnetic bearings. The rotor is supported in the radial direction by 4 pairs of radial direction active magnetic bearings that consist of radial sensor and radial electromagnet. A pair of axial direction active magnetic bearings consists of axial sensor and axial electromagnet to support the rotor in the axial direction. Because the rotor is supported without mechanical contact, it can rotate at low vibration. There is less heat generated from magnetic bearings because there is no friction.

Therefore the STP pump requires no cooling. However, the STP pump requires water or air cooling during baking and gas pumping. Taking into consideration a breakage of magnetic bearings, touch down bearings coated with solid lubrication have been installed. They do not contact with the rotor during the rated operation. A radial sensor, an axial sensor, a rotation sensor and a temperature sensor always monitor the magnetic bearing as well as the rotor. If an abnormality/error occurs, the rotor will stop. All accessories for this pump are available on this website or call 505-872-0037 for details. For complete specs, see graphic below or download the STP manual.pdf in DOWNLOADS to the left.