Watson-Marlow SP Series - Manual (Page 19)

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7.2 Cleaning pump hose
With a lot of products it is necessary to have the pump hose cleaned immediately after
pumping to avoid hardening of the product inside. The inside of the pump hose can be easily
cleaned by rinsing the pump with clean water. If a cleaning fluid is added to the water, it must
be checked that the hose liner material is resistant to that. Also note that the pump hose can
resist the cleaning temperature. Special cleaning balls are also available; please consult your
Bredel representative).
7.3 Changing lubricant
• Place a tray under the drain plug (series SP/25 to SP/100) in the cover of the pump.
Remove the drain plug. Catch the lubricant from the pump housing in the tray.
Position the drain plug and tighten it firmly. In case of SP/10, SP/15 and SP/20
pumps: remove the hose and drain via the lower port.
• The pump housing can be filled with lubricant via the breather/vent on the cover. For
this purpose remove the breather cap and position a funnel in the breather. In order
to facilitate the filling with lubricant for the series SP/25 to SP/100 it is advised to
remove one or two bolts in the inspection window. Pour the lubricant in the pump
housing via the funnel.
• Keep on pouring until the lubricant level has risen at approx. half way of the pump
casing, or that the specified quantity has been filled. See “Lubricant” § 10.1.3.
7.4 Changing oil in gearbox
For information regarding the changing of oil in the gearbox and the type of oil to be used we
refer to the documentation of the manufacturer of this item.
7.5 Replacing pump hose
7.5.1 Hose removal
The pump hose can be changed without removing the pump cover. If applicable, close the
isolation valves on both the inlet and discharge of the pump to minimize fluid loss.
7.5.2 Removal
of lubricant
Place a lubricant tray of sufficient capacity to contain the hose lubricant plus any process
fluid that might be contained within the pump housing. Remove the drain plug (not applicable
for SP/10, SP/15 and SP/20; lubricant will flow when hose is removed) . Ensure that the
breather vent in front is not blocked.
7.5.3 Removal
of piping
Shut off the valves on both suction and discharge side and disconnect the piping of both the
ports.
7.5.4 Loosening of hose clamps
Loosen all hose clamps on both suction and discharge ports.
7.5.5 Removal of flanges and/or inserts
Pull the inserts from the hose (SP/10, SP/15 and SP/20) by removing the flanges (SP/25-
SP/100) on both the suction and discharge port.