Mode Of Operation - SPX APV DELTA DF plus 2 Operating Manual

DELTA DFplus2 - UK1 / qxd.12.2004
Double Seat Valve
DELTA DFplus2
Operating Manual: rev. 1
3.

Mode of Operation

Valve in closed position
The upper and lower valve shaft are closed by spring force.
The different liquids A and B are safely separated from
one another.
The leakage chamber which is situated between the two valve
shafts, provides for a free and depressurized drain to the bottom.
upper
valve shaft
leakage
chamber
lower
valve shaft
Valve in open position
The upper valve shaft is pressed against the seal of the lower
valve shaft and out of its seat by control of the actuator. At the
same time, the leakage chamber is closed against the product
chamber. The two valve shafts move to the bottom into the
open position. Pipelines A and B are connected.
UK
A
B
A
B
4