The layout of the pipes and their connection have a decisive inuence on how the pump works and its
life.
The pipes must not transmit excessive forces or moments to the pump they areconnected to. They
must be made to coincide before the bolts are tightened; under no circumstances must you attempt
to straighten the pipes by tightening the ange bolts or threaded ttings.
FEATURES OF THE INTAKE PIPES
In order to minimise vibrations in the system we recommend connecting exible pipes to the pump at
the initial part, both for intake and delivery.
The intake pipe must be suciently resistant so the vacuum produced by the pump does not cause it
to shrink. Its inside diameter must be a minimum 2 1/8 inch at all points (54 mm).
Feed the pump from both intakes. Make sure all ttings and pipes are leakproof.
Do not use 90° elbows, connections with other pipes, constrictions, reverse gradients, inverted “U”
bends or tees.
Make sure the connections are such that when the pump stops the pipe does not empty.
ALIGNING THE PUMP-MOTOR UNIT
Correct alignment is essential to ensure regular functioning and long-life.
In the case of transmission of motion by means of pulleys and belts, use an alignment bar to align the
pulley with the motor.
In the case of connection with a exible joint, align using the relative bar, keeping in mind that as
regards angular alignment, a maximum deviation of 3° is allowed.
Alignment must always and only be done when the motor is switched o.
ROTATION DIRECTION
Always observe the exact rotation direction indicated by the arrow near the power take-o shaft (Fig.
07).
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