Burkert 3280 - Structure and Function; Electromotive Seat Valve Type 3280; Electromotive Disk Valve Type 3285

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Product description
Type 3280, 3285
5.3 Structure and function
5.3.1 Electromotive seat valve Type 3280
The valve spindle is driven by a stepper motor. The angular movement of the motor is converted to translational
movement with the aid of a threaded spindle. The valve spindle is connected rigidly to the threaded spindle. The
valve spindle is connected to a control cone.
Linear stepper
motor
Body
Elastomer seal
Threaded spindle
Control electronics
Valve spindle
Control cone
Figure 1: Electromotive seat valve Type 3280
5.3.2 Electromotive disk valve Type 3285
The disk valve consists of a stepper motor with gearbox which transfers the rotational torque to the actuator shaft
via coupling. The actuator shaft has control/shut-off disc attached to it. A fixed disk with a mouth attached to the
body is used as a valve seat. Control/shut-off disc is pressed onto the fixed disk by a supporting spring. The actuator
turns the control/shut-off disc about 180° above the fixes disc and opens or closes the valve seat.
Stepper motor with
gearbox
Coupling
Body
Control electronics
Spring
Actuator shaft
Control/shut-off disc
Fixed disc
Figure 2: Electromotive disk valve Type 3285
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