3
3. Mode of Operation
Due to the use of high quality stainless steel and adequate
seal materials, the double seal butterfly valve DSV is suited for
applications in the food and beverage industries as well as in the
pharmaceutical and chemical industries.
The function of the double seal butterfly valve is to shut off line
sections.
It is exclusively suited for applications in the CIP area,
whereby the valve is subject to defined cleaning and flushing
processes.
Valves of the DSV series are remote controlled by a pneumatic
actuator. Reset by spring force into the limit position closed.
Extension of operating time of actuated valves by pneumatic air
throttle or adjusting screw in the Control Unit CU3 to optimize the
flow behaviour.
The valve opens and closes by turning the valve disc by 90°.
Smooth valve passage without diversion of line flow.
The opening diameter complies with the size of the inner line
diameter.
Cleaning of the product-wetted valve surface is performed during
cleaning of the pipeline.
Leakage arising in the area of the butterfly valve seal flow out in
depressurized state via the leakage drain.
The leakage chamber in the area of the double valve disc can be
cleaned via a cleaning connection.
As option, the DSV-valve is available in manual design.
The two final positions of the valve are fixed by locking of the
handle. The handle must be unlocked for change-over.
leakage-drain
R1/4”
leakage chamber-
cleaning connection R1/4”
Double Seal Butterfly Valve
DSV
Operating Manual: rev. 2
UK
adapter
DSV with manual actuation
DSV with pneumatic turning actuator
and valve position indicator
proximity switch
holder
air connection
turning actuator
adapter flange
DSV-UK2.qxp / 10.2005
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