3 Pumphead types
The following 500 seriespumpheads are covered by this manual:
505LA ATEX pumpheads, offset tracks for single channel operation
505LA 053.4001.A00 505LA ATEXpumphead
505LXA 053.4011.A00 505LXA ATEX pumphead
505LGA 053.4010.A0G 505LGA ATEXpumphead
505LA ATEX pumpheads, inline tracks for two-channel operation
505LA 153.4001.N61 505LA ATEXpumphead, inline tracks
505LXA 153.4011.FB1 505LXA ATEX Extension pumphead, inline tracks
505LGA 153.4010.FB2 505LGA ATEXGore pumphead inline tracks
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 hazardouslocations.
Any 500 series pumpheads not listed above are NOT suitable for use in hazardous
environments (at date of issue).
3.1 505L ATEX pumphead description
The 505L ATEX pumpheads use the peristaltic principle by employing 6 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 the track and rotor body being anodised
aluminium. The occluding rollers are of steelconstruction. The rotation of the occluding rollers is allowed
using roller bearings supported by steel shafts. 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 instructionsdetailed in this manual.
PB0379:m-505atex-en-04 5
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