Manual Actuation Of The Actuator Via Pilot Valves; Single-Acting Actuators (Control Function A And B) - Burkert 8694 REV.2 Operating Instructions Manual

Important information for the problem-free functioning of the device:
▶ The installation must not cause back pressure to build up.
▶ Select a hose for the connection with an adequate 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) or (3.1).
▶ 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
9.3

Manual actuation of the actuator via pilot valves

9.3.1

Single-acting actuators (control function A and B)

The actuator can be moved without a power supply from the rest position to its end position and back again.
To do this, the pilot valves must be actuated with a screwdriver.
ATTENTION!
The hand lever may be damaged if it is simultaneously pressed and turned.
▶ Do not press the hand lever when turning it.
Pilot valve non activated
(normal position)
Hand lever
to the left
Pilot valve activated
Hand lever
to the right
Figure 32: Pilot valves for aerate and deaerate the actuator
48
english
Pilot valve
for aerate
Pilot valve
for deaerate
Type 8694 for high air flow rate
Pilot valve
for aerate
Pilot valve
for deaerate
Type 8694 REV.2
Pneumatic installation