General Pump KF Owner Manual - Manual (Page 7)

GENERAL PUMP
A member of the Interpump Group
KF SERIES
Page 7
9. PUMP INSTALLATION
9.1 Positioning
The pump must be installed on a rigid and perfectly flat
and horizontal base by means of the proper four M16
x 1/2 threaded feet. The base should be rigid enough to
avoid any misalignment or flexing on the pump/
transmission coupling axis due to the torque involved
during operation. The unit should not be rigidly fixed on the
floor but be installed upon vibration dampeners.
The oil plug must absolutely be replaced by the oil
stick and the oil level checked. Make sure that you can
easily reach the oil stick even after the unit has been
assembled.
Never use rigid coupling on the shaft.
The following transmission types are suggested:
- Hydraulic by means of a flange.
- Pulleys.
- Cardan joint (within the max working angles indicated by
the manufacturer).
9.3 Water connections
In order to isolate the high pressure equipment from the
pump vibrations it is suggested, where applicable, to use
flexible hoses for both suction and delivery lines at least
for the first length. The flexible hose must be rigid enough
to prevent it from collapsing during the suction stroke,
when a partial vacuum may occur.
9.4 Suction line
The pump life is considerably influenced by the
effectiveness of the suction line which must have
the following characteristics:
1. Internal diameter should be at least 1/2”, in any
point, possibly larger depending on the drop in
pressure due to the length and shape of the line.
2. Should be as straight as possible minimizing changes
in size and direction and positioned in such a way
to allow air pockets and bubbles to escape.
3. Should be perfectly airtight.
4. Should be completely free from 90o elbows, diameter
reductions, counter slopes, “T” connections and
should not be connected to other pipelines.
5. Should be positioned in such a way to prevent the pipe
emptying after the pump stops.
6. Do not use high pressure hydraulic fittings like 90o
elbows, high pressure adapters, high pressure 3 or
4 way nipples and so on.
7. Do not install any kind of detergent injector along the
suction line.
8. Do not install standing valves, check valves or other
kind of one-way valves.
9. Make sure that the feed tank capacity and the water
minimum level do not give rise to turbulence at the
tank outlet port, which, in turn, might create
cavitation at the pump.
10. Do not connect the by-pass line from the valve directly
to the pump suction line.
11. Connect the by-pass line from the valve directly to
the feed tank and make sure that both the by-pass
and tank feeding flows could not give rise to
turbulence at the tank outlet port, which, in turn, might
create cavitation at the pump. Proper baffle plates
should be provided inside the tank.
12. Before connecting the suction line to the pump inlet
port make sure the pipe is perfectly clean inside.
9.2 Direction of rotation
An arrow situated on the crankcase near the shaft
indicates the correct direction of rotation. Fig. 4 shows the
direction of rotation looking at the pump from the fluid end
side.