Alfa Laval 8693 Anleitung Seite 20

procedure:
→
Connect the control medium to the pilot air port (1)
(3 – 7 bar; instrument air, free of oil, water and dust).
→
Attach the exhaust air line or a silencer to the exhaust air port (3)
and, if available to the exhaust air port (3.1) (see "Fig. 11").
Exhaust air port
(label: 3)
Pilot air port
(label: 1)
Additional exhaust
air port
(label: 3.1)
only for Type 23xx and 2103
with pilot-operated control system
for high air output (actuator size ø 125 / 130)
Fig. 11: Pneumatic connection
20
english
Type 8692, 8693
Fluid installation
Caution: (Exhaust air concept): In compliance with protection
class IP67, an exhaust air line must be installed in the dry area.
Keep the adjacent supply pressure always at least 0.5 – 1
bar above the pressure which is required to move the 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 pressure supply
as low as possible (max. ±10 %). If fluctuations are greater,
the control parameters measured with the X.TUNE function
are not optimum.