System Description; Application Area; Design; Function - Burkert 0258 Instructions De Service

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SYSTEM DESCRIPTION

Application area

The modular 2 and 3-way motorized regulating valve of Type 0258 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

Electrical connection
(AMP or circular
connector according
to DIN 43651,
Hirschmann)
Emergency manual override
(optical position indicator)
The Type 0258 motorised regulating valve has a modular design, and is
mounted individually or assembled into blocks. Up to 4 valves can be
combined in one block. It can be used as either 2 or 3-way valve, as desired,
and contains ceramic sealing elements, while the valve body is made from
plastic.
The electrical rotary actuator with d.c. motor that is used here consists of
either a maintenance-free flat drive
maintenance-free spur drive
Hirschmann plug (options possible), an emergency manual override with an
optical position indicator and one or more valve modules.
In connection with the emergency manual override, the drives have a rotation
angle of 180°. The drives may not be operated without emergency manual
override, as the position feedback can otherwise become maladjusted.
1) Flat drive (LC): referred to as "LC" in the following text
2) Spur drive (Mod): referred to as "Mod" in the following text

Function

By means of a shaft, the drive moves a regulating disk over a fixed disk made
from ceramic oxide, and thereby alternately closes the valve seats 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.
6 - 0258
1)
(LC) with an AMP plug, or of a powerful,
2) (Mod) with a magnetic clutch coupling and
Motor drive -
powerful spur drive with
magnetic coupling (Mod) or
flat drive (LC), with
position feedback in each
case
Valve module