Burkert Type 0250 - Manual (Page 8)

8 - 0250
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system desCrIptIon
application area
the modular 2 and 3-way motorized regulating valve of type 0250 is preferably used
as a control element for hot water or coolant circuits in buses, goods vehicles, floating
and rail vehicles, as well as in machine tool construction.
design
Valve module
Motor drive -
powerful spur drive with
magnetic coupling
electrical connection
(hirschmann plug)
emergency manual override
(optical position indicator)
the type 0250 motorised regulating valve has a modular design, and is mounted indi-
vidually or assembled into blocks. up to 4 valves can be combined in one block. it can
be used as either a 2 or 3-way valve, as required, and contains sealing elements from
FKM, Ms and pps. the valve body is made of plastic. the electrical rotary actuator
with d.c. motor that is used consists of a maintenance-free, powerful spur drive with a
magnetic coupling and hirschmann plug, an emergency manual override with optical
position indicator and one or more value modules.
in connection with the emergency manual override, the drives have a rotation angle of
approx. 90°. the drives may not be operated without emergency manual override, as
the position feedback can otherwise become maladjusted.
Function
the drive moves a control cone with seals via a cam, and thereby alternately closes
the valve seat a and B with a sliding transition.
the flow values (2-way), mixing or distribution ratios (3-way) are continually variable
depending on the rotation angle.
the position feedback takes places using a potentiometer.