Working principle of the unit
Working principle of the unit
The filtration unit has a motor-pump assembly (20) where the vane pump is
directly flanged onto the drive motor.
Depending on the version, the drive motor is DC/AC or pneumatically
powered.
You will find the the specifications for the supply voltage / pressure on the
name plate for the motor-pump assembly (20) or via the model code for the
filter unit on page 62.
It is only for the 110 / 230 V version that you will find an on/off switch (22) on
the electric motor's terminal box with a motor protection relay to protect it
from overload and a power cable with a mains plug (23).
The motor-pump assembly is flanged onto the head part. The head part
contains the following components:
•
A pressure relief valve to protect against overloading. It is located
between the suction and pressure side of the pump and has an
opening pressure of ≈ 3.5 bar
•
A suction strainer (5) in the suction port. Access via the hose coupling
(27).
•
The holder to fix the suction and pressure hose.
OF7S / OF7K
en(us)
Page 28 / 68
BeWa OF7 3430048e en-us 2016-04-28.doc
2016-04-28
