Division [2B231] Vacuum pumps having all of the following characteristics:F1

1. a..

   Input throat size equal to or greater than 380 mm;

2. b..

   Pumping speed equal to or greater than 15 m³/s; and

3. c..

   Capable of producing an ultimate vacuum better than 13 mPa.

Technical Notes:

1.

The pumping speed is determined at the measurement point with nitrogen gas or air.

2.

The ultimate vacuum is determined at the input of the pump with the input of the pump blocked off.