Pumphead Types; Pumphead Description - Watson Marlow Pumps 620RA Serie Manual Del Usuario

3

Pumphead types

The following 600 series pumpheads are covered by this manual:
620RA ATEX Pumpheads
620RA* 064.0211.A00
620REA* 064.0231.A00
620RE4A* 064.0431.A00
* NB: these pumpheads are compatible with a number of Watson-Marlow cased drives. However, the
Watson-Marlow cased drives are not ATEX compliant and must not be used in hazardous locations.
Any 600 series pumpheads not listed here are NOT suitable for use in hazardous
environments (at date of issue).
3.1

Pumphead description

The pumpheads use the peristaltic principle by employing either 2 or 4 occluding rollers assembled as a
rotor, which occludes a specially designed tube and provides fluid flow by positive displacement as it
rotates.
The pumphead is largely of coated metal construction with metal shafts for the occluding and following
rollers. The rotor body is moulded from a conductive nylon compound. The rotation of the occluding
rollers is allowed using roller bearings. Materials of construction are detailed in this manual.
The pumphead is designed to be direct mounted or close coupled onto a suitable motor gearbox using
the instructions detailed in this manual.
5
Two rollers for max 2 bar. Continuous tubing only
Two rollers for max 4 bar. LoadSure tubing elements only
Four rollers for max 4 bar. LoadSure tubing elements only
PB0347:m-620atex-en-03