Watson-Marlow 202BA User Manual
205BA pumphead
Introduction
Thank you for selecting the Watson-Marlow 205BA pumphead.
This pump head is very similar to the 202AA pu mph ead, but the 502BA has eight driven
rollers giving the benefit of d elivering low er pu lsatio n. It is easy-loadin g, uses the same
range of manifold tubing as the 202AA and is available in 4, 8 and 12 channel versions.
These supplementary instructions should be read in conjunction with either the
202U/AA or 202S/AA operating instruction manual.
Tube range
The tubing used in the 205BA is th e same sizes and five materials of manifold tubing
manufactured for the 202AA - please see the relevant page in your manual.
Flow rates
These flow rates w ere obtained pumping water at 20C with zero su ction and delivery
pressures. If flow rate is critical, it should be measured under operating conditions
where the important factors are suction and delivery, temperature and viscosity.
Installation and
operating
nstructions i
205BA flow rates at the maximum speed setting (50rpm)
Tubing internal diameter
0.13mm 0.19mm 0.25mm 0.38mm 0.50mm 0.63mm 0.76mm
0.005" 0.007" 0.01" 0.015" 0.02" 0.025" 0.03"
ml/min 0.025
Tubing internal diameter
0.88mm 1.02mm 1.14mm 1.29mm 1.42mm 1.47mm 1.52mm
0.035" 0.04" 0.045" 0.05" 0.055" 0.058" 0.06"
ml/min
Tubing internal diameter
1.65mm 1.85mm 2.05mm 2.38mm 2.54mm 2.79mm
0.065" 0.07" 0.08" 0.09" 0.1" 0.11"
ml/min
1.40 1.85 2.28 2.93 3.48 3.75 3.98
4.60 5.75 6.90 8.95 10.0 11.7
0.060 0.130 0.240 0.40 0.75 1.05
Cassette loading
For safety reasons, all cassettes should be in position in the pumphead during
normal running, even if some do not contain tubing.
Do not place fingers in the p umphead
Pumphead care and maintenance
When the pumph ead needs cleaning, sw itch the drive o ff and isolate it from the mains.
Withdraw the cassettes from th e pu mp head and remo ve th e tubin g. Wash the cassettes
in water and mild detergent. If fluid has been spilled into the pumphead, removal of the
pumphead from the drive will make cleaning easier. Periodically, inspect all moving
parts for wear and ensure all bearings and rollers are free to rotate.
Remove the pumphead from the drive to lubricate the drive dog every 6 months if the
pump is being used for continuous duty. 12 months interval will be sufficient if it is
used intermittently
Pumphead spares
# Description Part number No per drive
1 Cassette DEA0014A
3 Roller 4 way DE 0981T 8
Roller 8 way DE 0982T 8
Roller 12 way DE 0983T 8
4 Roller bearing BB 0034 2 per roller
5 Centre shaft bearing BB 0038 2
6 Centre spacer bearing BB O014 2
7 Roller gear MN 0983M 8
8 Centre gear MN 0982M 1
9 Friction O ri ng OS 0013 1
4 channel pumphead 023.0102.000
8 channel pumphead 023.0302.000
12 channel pumphead 023.0502.000
PB0178
Loading...