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APV_DKR2 ATEX_UK-0_022018.indd
UK
Double Seat Ball Valve DELTA DKR2
ATEX Design
Instruction Manual: UK-0
APV
5. Mode of Operation
5.1.
General terms
Due to the use of high-quality stainless steel and seal
materials complying with the specified requirements, the
double seat ball valve DELTA DKR2 can be used in the food
and beverage industries as well as in the chemical and
pharmaceutical industries.
The field of application of the DELTA DKR2 valve comprises the
separation of two line sections with different fluids (B and C)
by two independent seals with intermediate leakage chamber and
free drain (D) to the atmosphere.
Actuation by the pneumatic turning actuator with air connection
at (A), reset into the limit position "closed" by spring force.
- The free opening cross section has the same dimension as the
nominal diameter of the pipeline.
-
Smooth valve passage without diversion of the fluid
- The valve opens and closes by turning of the valve ball by 90°.
- Cleaning of the leakage chamber by supply of cleaning liquids via
the cleaning connection (E).
- During the switching process, operating leakages drain off from the
leakage drain (D) tot he bottom. If a cleaning line is not connected,
the cleaning connection (E) must be sealed by a plug or operating
leakages draining from (E) must be discharged.
-
The cleaning nozzle (E) can be used to flush the leakage chamber
with water, or with CIP liquids and clean it with water, for fast
emptying, to vent or to sterilize the leakage chamber with steam.
Proximity switches to signal the limit position of the valve ball can be
mounted in the yoke area.
Proximity switch which are permitted for use in explosive
atmospheres must be used, only.
The use and operation of proximity switches must be evaluated by
the operator of the plant!
B
C
A
E
D