Description of Function
12 / 36
DOUBLE-SEAT VALVE INOVA (Type 580)
BA 058000.06 EN
15.11.2018
4
Description of Function
Double-seat valves are installed at critical connection points of two process pipings. The
different liquid media flowing through the pipings are sealed twice (double) against each
other in the valve’s seat area through the upper and lower valve disk.
The leakage chamber is formed between both valve disks. Should a leakage occur at one of
the two valve disks, then the respective medium can flow out through the leakage chamber
to the outside.
The leakage-free switching function is characteristic for the double-seat valve:
1.
The lower valve disk moves in the valve seat’s sealing area against the upper
valve disk. At the same time, the leakage chamber is completely closed.
2.
The valve disks now lying against each other move from the upper valve seat
area into the open valve position.
3.
When the valve is closed, the adjacent valve disks now move into the upper
valve seat area. The leakage chamber is still closed.
4.
The lower valve disk moves in the valve seat’s sealing area to its final position
and at the same time slowly opens the leakage chamber.
The upper and lower valve disk are integrated into the respective balancer. During the
switching function, the balancers move between product chamber and the upper or lower
flushing chamber.
The sealing between the product chamber and the flushing chamber is effected through a
gap-free tensioned lip sealing.
The valve’s switching process is carried out via two pneumatically controlled pistons in the
valve actuator. The piston movement is transferred to the valve’s main rod with the lower
valve disk or a superimposed valve rod with the upper valve disk.
4.1
Valve types
INOVA double-seat valve
Order code 580xx
Type
Single-seat
lifting
Leakage
chamber
cleaning
Balancer
cleaning
INOVA P lus
INOVA T op
INOVA B asic