Brochure

Fisher
®
Cavitation-Control Technologies | 9
PRODUCTION: Co-generation power.
APPLICATION: Boiler feedwater drum level system.
CHALLENGE: Seat leakage due to cavitation and frequent trim replacement.
SOLUTION: NPS 6 Fisher HPT valve with 4-stage Cavitrol III trim and Class V shutoff.
RESULTS: Operating time increased by 50% and control was improved.
PROVEN RESULTS
is used for cavitating liquid applications in various
globe and angle valve bodies. Cavitrol
™
III trim can
effectively eliminate cavitation damage.
The cage contains a multitude of specially shaped
holes; the hole shape reduces fluid turbulence.
In addition, the holes are radially aligned to flow
from one restriction to another. This action is
pressure staging, dividing the total drop into
smaller increments. Both features dissipate the
fluid pressure and prevent cavitation.
n 1, 2, 3, or 4-stage trim
n Globe or angle body
n ASME Class 300 - 2500
n NPS 1 - 24
n Flow-down design
n 276 bar (4000 psi) pressure drop limit
n ANSI/FCI Class V shutoff
The optional Protected Inside Seat technology,
shown right, has seating surfaces on the inside
tip of the valve plug and the radius in the groove
of the seat ring, so shutoff surfaces are not
exposed to potential erosion.
n 2, 3, or 4-stage trim
n Globe or angle body
n ASME Class 900 - 2500
n NPS 2 - 6
n Flow-down design
n 276 bar (4000 psi) pressure drop limit
Cavitrol
™
III trim