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Watson-Marlow 620DuN and 620Du User Manual 89
29.6 620RE and 620RE4
tube element loading
620RE element pumpheads are factory set to accept Watson-Marlow LoadSure tube
elements. Pumping performance will be adversely affected if LoadSure elements are
not used.
Open the guard using a suitable screwdriver or a 5mm Allen key. Disengage the
rollers.
Locate one of the “D”-shaped flanges into the lower port. (The “D” flange
ensures that the element can only be loaded correctly).
Wrap the tube element around the disengaged rollers of the rotor.
Locate the second “D”-shaped flange into the upper port.
Ensure the flat face of each “D” flange sits flush to the flange sealing face of
the track.
Engage the rollers.
Close the guard and push it against the track until the latch engages.
Connecting LoadSure elements to supply and discharge tubes
LoadSure sanitary elements - which have white connectors - are connected to a tub-
ing system using Tri-clamps and EPDM gaskets.
Hold the connector end of the supply or discharge tube against the element
connector, with an EPDM gasket between them.
Use a Tri-clamp to engage both flanges squarely, close it and tighten.
Always isolate the pump from the mains power
supply before opening the guard or performing
any positioning, removal or maintenance.