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2.2 SAFETY DEVICES
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CAUTION
•
The machine which incorporates the pump must always be provided with the safety devices
described below.
•
If the safety valve cuts in repeatedly, immediately stop operation of the machine, which
incorporates the pump, and have it tested by a Skilled Technician.
•
Any drainage from the safety valve must not leak into the environment.
•
Should the protection of the pump shaft break or be damaged, the machine which incorporates
the pump must not be used until it has been tested by a Skilled Technician.
•
Do not place hands or feet on the pump shaft protection.
a) Safety valve
This is standard for certain versions and is available as an optional accessory for others.
It is an appropriately calibrated, maximum pressure valve that discharges excess pressure should
any anomaly occur in the pressure adjustment system.
b) Pump shaft protection
This is standard for certain versions and is available as an optional accessory for others.
It is to prevent the operator from coming into contact with the moving parts of the pump shaft.
c) Pressure limit/adjustment valve
This is standard for certain versions and is available as an optional accessory for others.
This valve enables the adjustment of the operating pressure and permits the pumped fluid to return
to the by-pass duct, thus preventing the creation of dangerous levels of pressure when delivery is
closed or should pressure be set that is above permitted levels.
If a pressure limit/adjustment valve has devices to intercept/distribute the pumped liquid (e.g. taps),
it is usually called a pump control unit. In this manual, the term control unit stands for both the
pressure limit/adjustment valve and the pump control unit.
2.3 IDENTIFICATION LABEL
The identification label (18) contains the serial number and the main technical specifications for
the pump: version, maximum delivery (at 0 bar/0 psi), delivery at maximum pressure, maximum
pressure, and maximum speed of rotation.
The identification label is located: on the front part of the crankcase for pumps BP20/15, MP20
and MP 30; on a label support plate fastened on a screw of the pressure accumulator for pumps
BP40/15, BP 60, P48 and P48AP; on a pump head (with adhesive label) for pumps APS 31 and
APS 41; on the oil compensator for pumps APS 101 and APS 121; on the front support for pumps
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