Piusi MA Série Mode D'emploi page 58

WARNING
4. Open the on-off ball valve mounted on the pump connection.
5. Open the three-way valve.
6. Check and regulate the network air pressure when the pump is running: MIN 2 bar
MAX 7 bar; max 5 bar for pumps with rubber balls.
CAUTION
4
7. To regulate the speed of the pump according to the fluid viscosity, you can
operate in two ways:
A. regulate the network air pressure
B. choke the air volume (flow rate) by means of the on-off valve mounted on the
pump
REMARK
WARNING
never start the pump with the product valves (intake
and delivery) closed: DANGER OF DIAPHRAGM
BREAKAGE.
if the pressure is below 2 bars when the pump is run-
ning, the pump may STALL. At a pressure higher than
the MAXIMUM threshold, yielding and leakages of
the product under pressure may occur and/or the
pump may break.
5
unprimed pumps have a negative suction head
capacity that varies according to the type of dia-
phragm and packing mounted. PLEASE CONTACT
THE MANUFACTURER'S CUSTOMER ASSISTANCE
SERVICE FOR FURTHER DETAILS.
If the pump has negative suction, reduce the speed
of the pump using the ball valve on the sir supply.
7A
min 2 bar
max 7 bar
7B
58/208
6