2. OPERATION
IOM manual Tapflo TF series
13
2.
OPERATION
2.1.
Before starting the pump
Make sure the pump is installed according to the installation instruction (chapter 1).
Filling of the pump with liquid before start is not necessary.
When installation is new or reinstalled, a test run of the pump with water should be
conducted to make sure that the pump operates normally and does not leak.
When installation is new or reinstalled, check the pump housing nuts tightening torque
(see chapter 5.5 “Tightening torques”). After approximately one week of operation, the
torque should be checked again. This is important to prevent possible leakage.
2.2.
Starting and operation
Open the discharge valve.
Note! Considering the suction capacity when air is still in the suction pipe, it is
recommended to start with low air pressure/flow (slowly) at the beginning. This
is not necessary if the pump is filled with liquid before start.
When the pump has been filled with liquid, the air pressure/flow may be raised in order
to increase the suction capacity of the pump. Remember that suction capacity is higher
when pump runs slowly.
The performance of the pump can be adjusted through the air supply by using a needle
valve and a pressure regulator. The performance can also be adjusted by normal flow
control on the discharge side of the system.
2.2.1.
Dry running
Although the pump is prepared for dry running it is important to have in mind that long
periods of dry run may cause damage to the air valve and circlips. What is more, an empty
pump should operate at low speeds – controlled by a needle-valve.
2.2.2.
Optimization of the pump lifetime
Running at full frequency (maximum air pressure/flow) continuously will cause
premature wear of the components. As a general rule, we recommend to run at half of
the maximum capacity of the pump. For instance, a TF100 pump should run continuously
at maximum 50 l/min.
As stated in chapter 1.8.1 Tapflo recommends to use an appropriate air treatment
system in order to extend the pump’s lifetime.
If the air humidity is high, use of a water separator or air dryer is recommended.
Otherwise on the air discharge side due to decompression, icing on the muffler may
appear causing it to shrink and eventually it can shoot out of its socket.
If the ambient air is humid, icing can occur outside of the muffler. In such case it is
recommended to use a longer exhaust of the compressed air (ca. 500 mm / 19,7’’).