Burkert Type 2301 - Manual (Page 8)

8
Product description
5.3 properties
• Direct installation of the positioners Type 8692 / 8694 / 8696 or
the process controller Type 8693.
• Optimum valve selection for the application through three standard
Kv values per line size (up to five 5 Kv values for ½" line size).
• High tightness by self-adjusting packing glands (spindle sealing
element).
• Closes tightly when using the PTFE control cone.
• High flow values by the streamlined valve body made of stainless
steel.
• Generously dimensioned expansion space above the seat to prevent
erosion on the body caused by cavitation.
• Simple and fast replacement of the control cone and the threaded
seat.
• Actuator can be rotated steplessly through 360°.
• Maintenance-free under normal conditions.
5.4 Technical features
• Theoretical setting ratio (Kv
S
/ Kv
0
) 50:1 (DN 8 – DN 50); alterna-
tively, other setting ratios can be realized.
• Kv
R
value, i.e. the smallest Kv value at which the angularity tol-
erance according to DIN IEC 534-2-4 is still maintained:
≤ DN 10 Kv
R
at 10 % of the stroke
> DN 10 Kv
R
at 5 % of the stroke
• The globe series is characterized by screwed-in seats, which can
be used to reduce the orifice of the control valve in particular.
definition dn
DN designates the orifice of the seat, not the orifice of the
line connection.
5.4.1 Options
• Control unit
Depending on the requirement, control units in various designs are
available.
• Positioner Type 8692, 8694 and 8696
• Process controller Type 8693
english
Type 2301