Flowserve ZK210 - Manual (Page 8)

8
Explanatory Notes
(continued)
Function
(continued)
For differential pressures up to 180 bar a nozzle with more than three stages is used. A four-
stage nozzle is required for nominal size DN 25 and a five-stage nozzle is used for DN 50
and DN 80.
For corresponding k
vs
values and valve lift specifications see data sheet ZK 210.
Setting slots
Direction of flow
Plug
Control edge
Orifices of sleeve
shown without sleeves
being shifted.
Valve seat
Protective sleeve
against wear
Control valve ZK 210 DN 50: 5-stage radial nozzle, ∆p
max 180 bar