Niro Soavi S.p.A
4.6.2 PRESSURE GAUGE
The pressure gauge installed on the machine is a component of fundamental
importance as it makes it possible to measure the machine’s operating pressure
and thus keep its operation under control.
With a faulty pressure gauge the required working pressure cannot be
maintained, so we recommend you keep a spare pressure gauge in stock in
case a replacement is needed.
The type of pressure gauge installed can vary depending on the machine model
or if optional configuretions are used.
The standard pressure gauge is analog with Bourdon spring and sanitary baffle
separator especially designed by NIRO SOAVI; it is also equipped with a
separator used to filter the normal pulsations of the plunger machine to allow
steady readings of operating pressure.
Never separate the pressure gauge from its separator.
Other versions of pressure gauges or pressure measuring devices are available
as alternatives:
• analog pressure gauge with signal transmitter: with 4÷20 mA output for
remote transmission of pressure signal
• pressure transducer: this is a sensor which gives an electric signal to be
amplified in order to obtain a 4÷20 mA output of the pressure signal
• digital pressure gauge with built-in display: this transducer has a display to
directly indicate the pressure value measured. Powered by internal battery.
The pressure gauge normally requires no maintenance, however we
recommend a periodical check to:
• verify the condition of the diaphragm which comes into contact with the
product; if it is punctured or damaged the pressure gauge must be replaced
• for analog pressure gauges, check the level of glicerine inside the dial; if
necessary fill the dial up to ¾ with 99.5% pure glicerine
• replace the gasket between the pressure gauge and the head
For instruments provided with electric equipment refer to the wiring diagram,
which also indicates the setting range of the instrument.
4c063e0c.doc 4.6.4
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