- Continuous rotation
- 25mm clear bore versions on 70mm OD flanges
- 55mm clear bore versions on 114mm OD flanges
- Interspace pumping to 10-2mbar via 34mm OD flange
- Coarse or High Precision versions
- Replaceable PTFE seals
- Fully Bakeable
- Optional stepper motorised versions
Differentially pumped rotary feedthroughs (DPRF’s) are of annular construction to enable a probe or similar device to be inserted into a UHV environment.
There are three versions of DPRF, coarse, manual high precision, and motorised high precision. The coarse version uses a steel bar to attain manual rotation, the high precision version uses a worm & wheel gearing to attain manual rotation, and the motorised version uses a stepper motor linked to the worm and wheel to obtain driven rotation. All of the DPRF’s have high thrust and radial load capacities, see technical information below for more details.
The DPRF may be used in conjunction with an appropriate high precision translator (see the manipulation section later in this catalogue). In this case you have the option of including an internal bearing support tube as part of the rotating assembly. This is recommended when the item that is required to be rotated needs additional support. As an example, a DPRF coupled to an Omniax with a rotating support tube is used to hold and rotate the liquid helium cryostat in the Cryoax manipulator.
