Watson & Sons 520DUN user manual

Check that the conical connector sleeve of the element to be fitted is the same colour as the pumphead rotor cap

520RE element loading procedure

Note: The element loading procedure is the same for industrial (pictured) and san- itary elements.

￿Select an appropriate Watson-Marlow 520RE tubing element, paying attention to pressure capability, bore size, tubing material and type of connector. See the table above for pressure ratings. Check that the connector sleeve of the element to be fitted is the same colour as the pumphead rotor cap.

￿Slide the connector D-flange at one end of the element into the lower connec- tor D-slot.

￿Disengage the rotor clutch by fully depressing the yellow clutch button on the side of the rotor hub and turning the hub a few degrees while the clutch button is still depressed. The rotor can now rotate independently of the gearbox and motor for one full revolution. If the clutch re-engages before tube fitting is complete, depress the clutch button again and turn the rotor a few degrees.

￿Feed the tubing element around the pumphead track, turning the rotor as nec- essary. Make sure the tubing is not twisted or pinched between the guide rollers and the track.

￿Slide the second connector D-flange into the upper connector D-slot.

￿Check that the element lies in the middle of the track and that the connectior flanges are pushed fully home.

￿Close the guard, pushing it fully home until the latch engages.

￿Connect suitable pipework to the pumphead tubing using appropriate connec- tors. See below.

Watson-Marlow 520DuN IP66/NEMA 4X User Manual 87