APV SPX DELTA DKR2, Руководство по эксплуатации

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4. Auxiliary Equipment
4
- Operating leakage reduction
During the opening and closing process of the valve, a
certain quantity of the fluid is lost as operating leakage
(see technical data).
Through a reconstruction of the valve, a reduction by about 40 %
can be achieved.
Complete retrofit kits to reduce the quantity of operating leakages
are available
(see page 14) .
- Operating leakage drain
To discharge operating leakages via a pipeline, retrofit kits
with weld end are available
(see page 15) .
Valve position indication
- Switches to signal the limit position of the valve ball can be installed
in the yoke if requested.
We recommend our APV standard proximity switches.
Type:
three-wire proximity switch (ref.-No. 08-60-011/93)
Operating distance: 4 mm / diameter : 11 mm / length: 30 mm
Feedback complete with support and proximity switch
(ref.-No. 15-33-023/93) for a limit position.
If the user decides to apply valve position indicators other than
APV type, we cannot take over the liability for any malfunctions.
- Control Unit
Units with feedback switches and solenoid valves to be assembled
on the actuator, for the pneumatic control of the valve are also
available in fieldbus technology.
The Control Unit CU can be installed on the turning actuator.
Different types are available:
designation : ref.-No.:
CU 31 Direct Connect 16-31-232/93
CU 21 Profibus 16-31-236/93
CU 31 Device Net 16-31-240/93
CU 31 AS - Interface 16-31-244/93
control unit DELTA CU
with adapter
Double-Seat Ball Valve with Cleaning Connection
DELTA DKR 2
Operating Manual : Rev. 7
UK