Watson-Marlow 900 Series - Manual (Page 4)

Page 4
Recommended operating procedures
DO keep delivery and suction lines as short as possible.
DO use the minimum number of bends in rigid pipe runs. If there must be a
bend, use a swept bend and not a tight elbow.
DO use suction and delivery pipelines with a bore equal to or larger than the
bore of the tube fitted in the pumphead. When pumping viscous fluids, the
losses caused by increased friction can be overcome by using pipe runs with
a cross sectional area several times greater than the pumping element.
DO run at a slow speed when pumping viscous fluids.
DO keep the track and sliding shoe clean.
DO ensure that the correct type and volume of coolant/lubricant is used.
DO NOT fit valves in the suction or delivery line without considering that
peristaltic pumps are self priming and will hold their prime up to several
metres, so there may be no need for non-return or foot valves, nor for the
loading valves required on many other kinds of pumps.
Any valves fitted must cause no restriction. If electrically actuated valves are
fitted, they should be interlocked so that the pump will only run when the
valves are open. Fit an automatic by-pass if manual valves are installed.
Explosion proof motors should not be used in an environment where an
explosive gas-air mixture is continuously present or present for long periods.
DO NOT connect door switches or any other switch gear with an explosion
proof motor.
The temperature of any part or surface of an explosion proof motor must
always remain below the ignition temperature of the gas-air mixture it is
operating in.
The connector elbow located at the top of the pump head, enables the pump
head to be drained of lubricant or any other substance in the case of tube
failure.
If the motor/gearbox used with this 900 series pumphead is not
supplied directly by Watson-Marlow, it is important to refer to the
maintenance manual supplied with the specific motor/gearbox.