3321 datasheet(23/26 Pages) BURKERT

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Type 3360

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AG3

Body connection (with wrench connection)

Port connection

Angle seat valve body

Electrical connections

circular plug-in connector

Only in versions with

process controller function

SAFEPOS energy-pack

(optional)

Pressure compensation element / access

for mechanical manual operation

FE functional ground

Relief bore

Actuator housing

Actuator cover

Transparent window with

position indicator

Actuator base

Blind cover or display with

status indicator and bayonet catch

Integrated position controller

The position of the actuator (stroke) is controlled

according to the position setpoint. The position

setpoint is either given by an external standard signal

(analogue) or via a fieldbus (digital). The displace-

ment transducer records the actual position (POS)

of the electric linear actuator. This actual position

value is compared by the positioner with the position

setpoint (CMD) specified as standard signal. If there

is a system deviation (Xd1), the electric motor drive is

controlled via the manipulated variable CTRL and the

actual position value is changed accordingly.

Valve opening

Electro-

motive

actuator

Travel sensor

Position

controller

Set-point

position value

CMD

Xd1

CTRL

POS

Position control circuit

+ -

Valve body

Integrated process controller (optional)

The additionally implemented PID controller allows

process control. The setpoint position of the valve is

calculated from the external signal (e.g. level, pres-

sure, flow rate, temperature) for the process setpoint

and the actual process value via the control parame-

ters (PID controller).

Process size

Process

Transmitter

Process-

controller

Process

setpoint

SP Xd2

CMD

Valve

opening

+ -

Positon

control

circuit

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