5
APV_DE3_UK-7_082017.indd
UK
Double Seat Valve
DELTA DE3
Instruction manual: UK - rev. 7
APV
4. Mode of Opeartion
4.2.
Valve in "closed" position
The lower and upper valve shafts are closed by spring force
and safely separate the different fluids
A
and
B
. The leakage
chamber
L
which is situated between the two valve shafts,
provides for a free and absolutely depressurized discharge to
the bottom. The valve shafts are balanced and, thus, safe against
pressure hammers.
4.3.
Valve in "open" position
During the opening process, the leakage chamber
L
is closed
against the product area and the pipelines
A
and
B
are connected.
In open valve position, the valve shafts are also balanced and,
thus, safe against pressure hammers.
fig. 4.3.
fig. 4.2.
L
A
A
B
L
B