Page 8 Isoil impianti SpA
Code MA/038/00/EN/03 All rights reserved. Reproduction of this manual is forbidden
CAUTION
All parts under pressure must be released before disassembling
the meter or its accessories for adjustment, inspection, servicing or
substitution of its components.
Also make sure that all electric or electronic part, if present, are
disconnected from its power supply.
3 Installation
3.1 Precautions
The installation of the meter counter does not require any special procedure; just pay
attention to the following points:
• The meter counter must be installed horizontally, the rotor axis must be kept
horizontal.
• All the meter’s openings are protected with covers when shipped; those must not be
removed until the meter is installed on the piping
• Before the installation of the meter, it's suggested to clean thoroughly the piping to
remove dirt, crusts and other foreign particles.
• Piping should not exercise strain on the meter. The meter is designed for overhang
and supports should be provided only on the adjacent pipes.
• Leave space enough around the meter to ease access for adjustment, servicing and
disassembly. The counter, if present, must be easily readable.
• The meter must always remain full of product; it's suggested to install the meter so
that it remains always under the main line.
• The line upstream the meter must always remain full of product to avoid that air
enters the meter's measure chamber; if the pipe arrangement allows reversal flow, a
non-return valve must be installed.
• Flow through the meter must be regular and uniform; pulsating and irregular flows
must be avoided.
• It is recommended to install flow limiting valves downstream of the meter if the flow
rate can reach values higher than the maximum allowed for the meter.
• If the line pressure can reach values higher than the maximum allowed, automatic
safety valves must be installed in adequate places.
• To protect meter from damages due to foreign particles in the liquid, a suitable
strainer with a correct mesh number (60 mesh for diesel oil, 100 mesh for gasoline)
must be installed upstream the meter.
• In case the rate of flow through the installation exceeds the meter maximum rated
capacity, it is advisable to use a flow limiting valve, which must be installed
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