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APV_SW4_UK-4_082017.indd
UK
Single seat and change-over valve
DELTA SW4
Instruction manual: UK - rev.4
APV
5. Auxiliary Equipment
5.3. Stroke limitation SW4 / M4 (fig. 5.3.)
The pneumatic stroke limitation provides for the continuous
adjustment of the total valve stroke of 0 - 100%.
The pneumatic stroke limitation is installed on the actuator.
The valve disc can be in the three different positions:
open, throttled and closed.
The stroke limitation can only be applied with valve design
NC (FS) = normally closed.
To operate the pneumatic stroke limitation a separate control is
required.
The control unit CU43-S-2 Hall sensors-Direct Connect
can be used for this purpose.
control unit + adapter
Designation:
reference No.;
ID-No.
CU43-S-2 Hall sensors-Direct Connect
000 08-45-106/93;
H320466
Designation:
reference No.;
ID-No.
CU4-S-Adapter
000 08-48-600/93;
H320474
5.4. Oil dampening cylinder (fig. 5.4.)
The oil dampening cylinder provides for a slow opening and closing
of the valve (to prevent pressure hammers in the line system). The
oil dampener is installed between the actuator and the control unit.
Function:
During valve switching, a throttling valve presses the oil from one
chamber of the dampening cylinder into the second chamber of the
cylinder. By adjustment of the throttling screw, the required delay
can be variably adjusted.
5.5. SW4 variants
The SW4 range contains the following designs:
- DELTA SW4 - DN125-150
- DELTA SW4 with manual actuation
- DELTA SWT4 - tank outlet valve
- DELTA SW4 - long stroke version
- DELTA SW4 -DPF (with steam chamber)
- DELTA SWR4 (with modulating cone)
- DELTA SW4 - ATEX DN 25-100, Inch 1"-4"
Corresponding manuals are available for the different designs.
fig. 5.3.
fig. 5.4.
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