APV DELTA SW4, Operating Manual

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UK
Single Seat and Change-over Valve
DELTA SW4
Operating manual UK - rev. 3
5
4.3. Stroke limitation SW4 / M4 (fig. 4.3.)
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 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.
4.4. Oil dampening cylinder (fig. 4.4.)
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:
A throttling valve presses the oil from one chamber of the
dampening cylinder into the second chamber of the cylinder
during the switching process. By adjustment of the throttling
screw, the required delay can be variably adjusted.
4.5 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).
Corresponding manuals are available for the different designs.
fig. 4.3.
fig. 4.4.
throttle screw
throttle valve
Control Unit + Adapter
Designation:
reference number:
CU43-S-2 Hall sensors - Direct Connect
000 08-45-106/93; H320466
Designation:
reference number:
CU4-S-adapter complete
000 08-48-600/93; H320474
4. Auxiliary Equipment
DELTA SW4 - UK-3.qxp 23.04.2009
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