Watson-Marlow Bredel 265 - Manual (Page 25)

INSTALLATION
25
5.3.3 Pipework
When determining and connecting suction and
discharge lines consider the following points:
•
The bore size of the suction and discharge lines
must be larger than the bore size of the pump
hose. For more information consult your Bredel
representative.
•
Limit the presence of sharp bends in the
discharge line. Make sure that the radius of the
bent discharge line is as large as possible
(preferably R=4d to 5d). It is recommended to
use Y-connections instead of T-connections.
•
Keep the piping at a minimum equal to or
greater than the bore size of the pump. Increase
the bore size of the pipe work when the duty
fluid has a high velocity or inertia. This will help
keep friction and impulse losses to a minimum.
Where critical velocities are a concerned,
consult your Bredel representative.
•
For the flexible hoses select compatible
materials and ensure the installation is suited
for the design pressure of the system.
•
Keep the delivery and suction lines as short and
direct as possible.
•
Prevent any possibilities of exceeding the
maximum working pressure of the hose pump.
See §
11.1.1 . If necessary fit a pressure relief
valve or shutdown switch. Consult your Bredel
representative for detailed information.
•
Consult your Bredel representative for
recommendations on mounting pulsation
dampening devices. A pulsation dampener and/
CAUTION
Consider the maximum permissible work-
ing pressure on the discharge side.
Exceeding the maximum working pressure
may lead to serious damage to the pump.