•
Max. pressure safety valve on delivery: mount it close to the pump. The valve flow must prevent
the PN155 from exceeding the absolute operating pressure (see par. “Usage limitations”) or, in
any case, the maximum pressure allowed by the system. Do not apply gate valves on the line.
•
Over-pressure safety relief valve (pos. 6): to apply if necessary to limit the vacuum rate in the
system.
Pos
Description
1
Primary flow shutoff
valve
2
Secondary shutoff
3
Suction filter
4
Exhaust silencer with oil
separator
5 *
Over-pressure safety
relief valve
6 *
Vacuum relief valve
* : optional components
CARDAN SHAFT DRIVE
Use telescopic cardan shafts. In order to achieve a uniform
motion of the driven shaft, the following requirements must
be met:
•
Equal working angle
α
and
α
1 of both couplings.
•
The internal fork joints must be coplanar.
•
Both driven and driving shafts must be coplanar.
It is also recommended working with limited articulated joint
angles (max. 15°) and disengaging the transmission for
those operations requiring great angles (steering or lifting).
Follow the rotation direction as indicated on the
front flange. Follow the instructions of the cardan
shaft’s manufacturer.
Use the cardan protection supplied with the pump.
The pump installation must fulfil the current EC
injury prevention specifications.
8. DRIVE
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