Burkert Type 8750 - Manual (Page 19)

19
Assembly
Typ 8750
Warning!
risk of injury from unsuitable connection hoses.
Hoses which cannot withstand the pressure and temperature
range may result in hazardous situations.
▶ Use only hoses which are authorized for the indicated pressure
and temperature range.
▶ Observe the data sheet specifications from the hose manufacturers.
procedure:
→
Connect the control medium to the pilot air port (1)
(3 – 7 bar; instrument air, free of oil, water and dust).
→
Fit the exhaust air line or a silencer to the exhaust air port (3).
Important information for the problem-free functioning of the
device:
• The installation must not cause back pressure to build up.
• To make the connection, select a hose with sufficient cross
section.
• The exhaust air line must be designed in such a way that
no water or other liquid can get into the device through the
exhaust air port (3).
Pilot air port
label: 1
Exhaust air port
label: 3
Fig. 11: Pneumatic connection
Caution (exhaust air concept):
In compliance with protection class IP67, an exhaust air line
must be installed in the dry area.
The applied pilot pressure must always be maintained at
least 0.5 – 1 bar above the pressure which is required
to move the pneumatic actuator to its end position. This
ensures that the control behavior is not extremely negatively
affected in the upper stroke range on account of too little
pressure difference.
During operation, keep the fluctuations of the pilot pressure
as low as possible (max. ±10 %). If fluctuations are greater,
the control parameters measured with the
X.TUNE function
are not optimum.
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