Burkert Type 8681 - Manual (Page 16)

16
System Description
number of solenoid valves 5.4.3.
The control head for process valves has been designed for single-acting and double-acting valve actuators as
well as for double-seated and multi-position valves.
type of use
number of solenoid valves
(3/2-Way solenoid Valve WWc*)
Repeater 0
Control head for single-acting actuators 1
Control head for double-acting actuators ** 2
Control head for double-seated valves with integrated aeration of both
valve seats
3
* WWC = circuit function C = 3/2-way valve; closed in rest position, output A unloaded
** both drive chambers currentless deaerated
pneumatic interfaces 5.4.4.
Intake & exhaust air connections: G 1/4 •
Working connections: G 1/8
Integrated non-return valves in the solenoid valves' exhaust air duct •
Actuation of Connection 2/A1 (Solenoid Valve 1; normally the main stroke of the process valve) using the mag- •
netic manual control that is externally accessible.
Special silencers with a high flow-rate capacity to connection 3/R have already been mounted. •
The interior of the housing is protected against excessive overpressure, for example due to leakages, by a •
pressure-relief valve with output into the joint exhaust air connection 3/R.
Manual Control 5.4.5.
Standardly, the control head provides the following:
a magnetic manual control that is easily accessible from the outside on the basis of encoded magnetic fields •
for Solenoid Valve 1 (Connection 2/A1), as well as
a mechanical manual control accessible when the hood is open on each equipped solenoid valve. •
the magnetic manual control has the following advantages:
the control head does not need to be opened •
a simple activation tool for opening & closing Solenoid Valve 1 (main stroke) - •
helpful for maintenance on the process valve
LED-display for the Activated Manual Control status, meaning service mode •
(see chapter 16. LED - Color Assignments and 17. Service Mode / Manual Control )
For a detailed description of the manual control, see chapter 17. Service Mode / Manual Control .
english
Control Head Type 8681