Watson-Marlow PD/40 - Manual (Page 13)

13
CAUTION
Consider the filling medium for the pulsation damper housing – in this
case compressed air or nitrogen. If in doubt concerning the correct
filling medium for your pulsation damper, contact your Bredel
representative for assistance.
CAUTION
Before pressurizing the pulsation damper ensure that the pulsation
damper is built in the piping system, ensure that the suction and
discharge valves are open, ensure that any drain valves are closed.
(process released for operation)
1. Shut the ball valve (pos. 17) on the pulsation
damper.
2. Connect the filling medium to the filling nipple (pos.
18).
3. Apply pressure to the pulsation damper by the filling
medium. Minimum filling medium supply pressure
should at least be equal to the process working
pressure directly upstream of the pulsation damper.
4. Start the pump
5. Open the ball valve (pos. 17) gently. Filling medium will now enter and pressurize the vessel.
Check the pressure gauge (pos. 20) for the actual pressure inside the vessel.
6. Pressurize the vessel to approximately 80% - 90% of the actual process working pressure of the
hose pump, directly upstream of the pulsation damper.
7. When the required pressure is reached, shut off the ball valve (pos. 17).
8. Shut off the supply pressure of the filling medium
Pressurize the vessel to approximately 80%-90% of the actual process
working pressure directly upstream of the pulsation damper as a
guideline. The actual vessel pressure depends on many variables,
making the optimum setting process specific. It is advised to slowly
increase the vessel pressure until the pressure fluctuations upstream of
the pulsation damper are minimized and optimal damping is obtained.
If the actual process working pressure is very low (for example during
standstill or after a transfer cycle is completed) it is advised to relief the
pressure from the pulsation damper.