Burkert Type 8681 Manual do Utilizador descarregar pdf (Página 16)

System Description

Number of solenoid valves5.4.3.

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

* WWC = circuit function C = 3/2-way valve; closed in rest position, output A unloaded

** both drive chambers currentless deaerated

Pneumatic Interfaces5.4.4.

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 Control5.4.5.

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 .

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Control Head Type 8681

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