Watson-Marlow 520DuN IP66/NEMA 4X User Manual
90
General guide to cleaning with solvents
31 520R, 520R2 and 520RE rotor
settings
520R, 520R2 and 520RE pumpheads are factory-set to give optimum tube life with
Watson-Marlow tubing and elements. Radial roller positions should not be adjusted
in any circumstances as this will adversely affect pumphead performance and inval-
idate warranty. Tamper-proof rotor arm occlusion setting screws are fitted to warn
operators from occlusion adjustment. Tubing with a wall thickness other than 1.6mm
or 2.4mm can be used only with a pumphead set up for that purpose during manu-
facture. Contact Watson-Marlow after-sales.
Chemical
Cleaning precautions
Aliphatic hydrocarbons
Remove guard. Minimize rotor cap and clutch
boot exposure to less than one minute
(risk of attack).
Re-lubricate follower and tube guide rollers.
Aromatic hydrocarbons
Remove guard. Minimize rotor cap and clutch
boot exposure to less than one minute
(risk of attack).
Re-lubricate follower and tube guide rollers.
Ketone solvents
Remove guard. Minimize rotor cap and clutch
boot exposure to less than one minute
(risk of attack).
Re-lubricate follower and tube guide rollers.
Halogenated/chlorinated
solvents
Not recommended: possible risk to
polycarbonate tube clamp adjusters and
polypropylene tube clamp locators.
Alcohols, general
No precaution necessary.
Re-lubricate follower and tube guide rollers.
Glycols
Minimize rotor cap and clutch boot exposure to
less than one minute (risk of attack).
Re-lubricate follower and tube guide rollers.
Ester solvents
Remove guard. Minimize rotor cap and tube
clamp location cap exposure to less than one
minute (risk of attack).
Re-lubricate follower and tube guide rollers.
Ether solvents
Not recommended: possible risk to
polycarbonate tube clamp adjusters and
polypropylene tube clamp locators.
