Assembly; Pneumatic Installation - Burkert 8681 Guide Rapide

7.2

Assembly

For the assembly of the control head Type 8681 to a process valve,
you will require a process valve-specific hub flange as an adapter.
The hub flange must be adapted to the design of the process valve.
→
Mount the piston rod with the target on the process valve
spindle. Observe reference dimensions!
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Fasten the hub flange on the process valve. During this, observe
central alignment and sealing conditions!
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Check the secure fit of the sealing rings (in the upper and the
lower groove).
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Mount the control head on the hub flange (infinitely 360°
rotatable).
→
Secure the control head with the two locking screws (shoulder
screws M5, tightening torque: max. 3.2 Nm) in the middle
groove of the hub flange against unintentional removal (not
fixed into position! – see "Fig. 1" or Operating Instructions,
chapter "Assembly").
7.3

Pneumatic installation

→
Connect the required working connections 2/A1 to 2/A3 (each
according to model) with the corresponding connections on
the process valve - see "Fig. 2" or in the Operating Instructions
Type 8681.
→
Connect the supply line to supply pressure connection 1/P
(2.5 ... 8 bar).
12
english
Type 8681
Assembly / Installation
→
A silencer has already been mounted on the exhaust air port
(3/R) in the supplied state.
Lead seal
lugs at
the housing
3/R
Exhaust air port
(silencer)
2/A3: SV 3 2/A2: SV 2
2/A1 ... A3 - working ports of solenoid valves (SV)
Fig. 2: Pneumatic connections
The flow restriction screws R and P
of the solenoid valves (see Operating
Instructions) are used for setting the
air intake and exhaust for the working
ports (for setting of the control speed of
the process valves).
Fig. 3: Flow restriction screws of the
solenoid valves
1/P
Supply pressure
connection
2/A1: SV 1
open closed
R
P