1. INSTALLATION
IOM manual Tapflo Hose pumps
9
The flow of liquid from the pump must be as even as possible. It is advisable to avoid any tight
bends or drastic reductions of diameters that may cause flow resistance in the installation. In
case of diameter reduction, it is advisable to use appropriate conical reductions (possibly
eccentric on suction side and concentric on discharge side) at changes of diameter and at a
minimum distance from pump connections of five diameters.
1.7.1.
Connection of suction pipe
Remember that the suction pipe/connection is the most critical point, especially if the pump is
priming. Just a small leakage will dramatically reduce the suction capability of the pump. When
connecting the suction pipe, the following is recommended:
1)
For satisfactory operation, use a reinforced hose (the suction power may otherwise shrink
the hose) or other flexible piping. The internal diameter of the hose should be at least
same as on the suction connection (at the bottom of the pump) to have best suction
capability.
If the diameter of a hose is smaller, it will affect the pump's performance or
cause its malfunction.
2)
Make sure that the connection between the hose and the pump is completely tight,
otherwise the suction capability will be reduced.
3)
Always use as short suction pipe as possible. Avoid air pockets which can emerge within
long piping.
1.7.2.
Connection of discharge pipe
For this connection it is only recommended to have a simple and positive flow connection. Use
a hose or flexible piping (minimum one meter) between the discharge connection and any rigid
fixed piping. Coil the hose at least one turn. All components (hose, pipe, valves etc.) on the
discharge piping must be designed for appropriate PN, according to pump maximum pressure.
It is recommended to install a check-valve on the discharge side in order to protect the pump
from water hammer effect that can be created in the discharge pipeline. If overpressure in the
discharge line is possible, an appropriate pressure safety device should be installed to protect
the pump. A device must be incorporated into the pump, system, or drive, to prevent the pump
exceeding the rated pressure. Do not allow the pump to operate with a closed/blocked
discharge unless a pressure relief device is installed.
A pressure relief valve must be assembled obligatory on the discharge side by the customer if
overpressure in the system is possible.
1.8.
Health and safety
The pump must be installed according to local and national safety rules.
The pumps are constructed for particular applications. Do not use the pump on
applications different from that for which it was sold without consulting us to ascertain
its suitability.
The pumps are tested with water. If the pumped product can come into reaction with
water, please make sure the pump is dry before putting it into operation.
Summary of Contents for PT CIP
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