Piusi CUBE B.SMART, Installation, Use And Maintenance Manual

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This manual belongs to PIUSI S.p.A. The reproduction of all or parts is prohibited.
CUBE
EN (translated from Italian)
14.3 HYDRAULIC CONNECTIONS
Always observe the following WARNINGS:
- Use pipes and joints suitable for use under vacuum
- Use pipes and accessories suitable for use with the handled liquid. Materials
not suitable for such use may cause serious damage to the pump and may also
cause pollution.
- Do not use joints with conical threads that may damage the threaded port of
the pump filter if forced beyond what is necessary.
- Use wide radius bends to minimize pressure drop.
- Make sure that the suction line is perfectly clean and free from waste.
- Always install a bottom valve with filter at the end of the suction pipe. The
valve must be placed on the bottom of the tank and have the same diameter
as the pipe.
- Before starting installation, check that any packaging materials have not
been trapped in the pipes.
SUCTION LINE
The diameter of the suction line “Ds” must be selected according to the
station model and positioning in relation to the tank. With reference to
the values of “Hp” and “Ls” defined in point 12.1, the following MINIMUM
DIAMETERS of the suction pipe must be strictly observed.
MAXIMUM
LENGTH OF
THE SUCTION
PIPES
The maximum length of the pipe, the diameter of the pipe, the height
difference “Ho” are closely related parameters to form the suction condition.
The latter must not be such as to create a vacuum greater than 0.6 bar.
Therefore, after having respected the minimum diameter for the pipe,
specified in the “Recommendations and Warnings” below, the length of
the pipe is the smaller, the greater the height difference Ho that the diesel
must overcome and vice versa: indeed, the vacuum increases progressively
by 0.08 bar for each meter of increase in the static height of the pump
compared to the flush level of the diesel in the tank.
RECOMMEN-
DATIONS AND
WARNINGS
- The suction pipe must withstand a pressure of at least 10 bar and must
have a minimum diameter NOT LESS than 1”1/4
- The pipe must also be suitable for vacuum operation.
- Use pipes and accessories suitable for use with diesel. Materials not
suitable for use with diesel can damage the pump or hurt people, as well as
cause pollution.
- Any bends in the suction line must have the widest possible radius in order
to minimise pressure drop.
- Make sure that the suction line is clean and free from waste.