Structure And Function - Burkert 3361 Operating Instructions Manual

6

STRUCTURE AND FUNCTION

The electromotive control valve consists of an electromotive linear actuator, a control cone and a 2-way globe
valve body or a 2-way angle seat valve body.
The control electronics and "SAFEPOS energy-pack" are housed in the side of the linear actuator.
The control electronics consist of the microprocessor-controlled electronic mechanism and the position sensor.
The actuation electronics assembly for position control or process control is actuated either via standard
signals (analogue) or a fieldbus (digital).
Standard devices are operated with 2 buttons and 4 DIP switches, while devices with a display module can
be display-operated.
The electromotive linear actuator consists of a brushless direct current motor, a gear and a threaded spindle.
The valve spindle connected to the threaded spindle transfers the force to the control cone.
• The linear actuator does not use any electrical energy when holding the valve position. This means that,
when idling, only the control electronics require energy.
• The stainless steel valve body aids in flow and facilitates high flow rates.
• The self-adjusting packing gland guarantees a high degree of tightness.
• The control cone is connected to the actuator spindle via a spring-type straight pin, and can thus be
quickly replaced.
• The actuator housing consists of a robust and heat-dissipating aluminium body with a detergent-resistant
coating. The plastics used are also detergent-resistant.
• The flow direction is always below the valve seat.
Valve seat:
• For a globe control valve, the valve seat is screwed-in.
The seat size can easily be reduced by exchanging the screwed-in valve seat.
• For an angle seat control valve, the valve seat is machined into the valve body. This means the seat size
cannot be reduced.
The valve seat is always closed against the medium flow. The flow direction must thus be such that the flow
reaches the valve below the seat.
Angle seat control valve Type 3360
Fig. 1: Flow direction below seat, flow direction
Fluidic connections:
• The threaded socket connection, welded connection or clamp connection are available for all valve
bodies.
• The valve body with flange connection is also available for globe control valve Type 3361.
18
Valve seat
Marking on the
housing
1 2
Flow direction
english
Types 3360 and 3361
Structure and function
Valve seat
1 2
Globe control valve Type 3361
Marking on the
housing
Flow direction