Watson & Sons 520DUN 31 520R, 520R2 and 520RE rotor settings, Chemical Cleaning precautions

General guide to cleaning with solvents

Chemical	Cleaning precautions
	Remove guard. Minimize rotor cap and clutch
Aliphatic hydrocarbons	boot exposure to less than one minute
	(risk of attack).
	Re-lubricate follower and tube guide rollers.
	Remove guard. Minimize rotor cap and clutch
Aromatic hydrocarbons	boot exposure to less than one minute
	(risk of attack).
	Re-lubricate follower and tube guide rollers.
	Remove guard. Minimize rotor cap and clutch
Ketone solvents	boot exposure to less than one minute
	(risk of attack).
	Re-lubricate follower and tube guide rollers.
Halogenated/chlorinated	Not recommended: possible risk to
	polycarbonate tube clamp adjusters and
solvents
	polypropylene tube clamp locators.
Alcohols, general	No precaution necessary.
	Re-lubricate follower and tube guide rollers.
	Minimize rotor cap and clutch boot exposure to
Glycols	less than one minute (risk of attack).
	Re-lubricate follower and tube guide rollers.
	Remove guard. Minimize rotor cap and tube
Ester solvents	clamp location cap exposure to less than one
	minute (risk of attack).
	Re-lubricate follower and tube guide rollers.
	Not recommended: possible risk to
Ether solvents	polycarbonate tube clamp adjusters and
	polypropylene tube clamp locators.

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.

Watson-Marlow 520DuN IP66/NEMA 4X User Manual 90