Watson-Marlow 720DuN User Manual
85
30 Tube loading
720 pumps can be operated with a 720R continuous tubing pumphead or with a
720RE pumphead fitted with Watson-Marlow LoadSure tube elements. For both
pumphead types, extension "X" pumphead options are available.
30.1 720R and 720RX
continuous tube loading
Loosen the track compression spring knobs using a 10mm A/F spanner, turning
them anticlockwise six (6) times.
Unscrew the track securing bolt and withdraw the bolt fully. Lift the track by its
handle and slide out from under the springs.
Release the tube clamps by pulling on the release levers and lift out both
clamps.
Lay the tubing across the pumphead. Secure the suction side by sliding in the
first tube clamp.
Fit the delivery clamp loosely to allow any excess tubing to work its way
through the pumphead. (See
Re-tensioning the tubing
, below).
Slip the right hand end of the track under the springs and position the left hand
end so the track securing bolt can be inserted.
Tighten the track securing bolt with the 6mm Allen key provided.
Tighten both the track compression spring knobs to a torque of 3Nm (2.2 lb-ft)
using a 10mm A/F spanner.
Note
: When a second pumphead is fitted the maximum pressure for each channel
should not exceed 1 bar (14.5 psi).
