Data Sheet

www.Fisher.com
Fisherr Control-Disk™ Valve NPS 14-24
The Fisher Control-Disk valve provides outstanding
performance under extreme pressure and
temperature conditions. The Control-Disk valve
maintains tight shutoff, is available in a fire-tested
version, and can be specified for cryogenic
applications.
The Control-Disk valve is available as a flangeless
(wafer), lugged, or double flange design. A splined
drive shaft combines with a variety of
spring-and-diaphragm or pneumatic piston actuators
to make the Control-Disk a reliable control valve for a
variety of throttling applicationsinthevariousprocess
industries.
The Control-Disk valve can be supplied with one of
several dynamic seals (figure 1) that can be used in a
variety of demanding applications. With the
appropriate seal selection and materials of
construction, the pressure-assisted seal provides
excellent shutoff against the full CL150 or 300 pressure
ratings.
Features
 Equal percentage flow characteristic– An equal
percentage flow characteristic provides an
improved throttling range comparable to that of a
segmented ball valve. This improved capability
allows you to control closer to the target set point,
regardless of process disturbances, which results in
a reduction in process variability.
 Economical Tight Shutoff– The pressure-assisted
seal design provides tight shutoff against the full
pressure rating of the specified valve.
Fisher Control-Disk Valve
X0686
 Shaft Retention– Shaft blowout protection is
designed into the Control-Disk valve (figure 2). The
anti-blowout gland fits securely over the valve shaft
which has been turned down to form a
circumferential shoulder that contacts the
anti-blowout gland.
 Excellent Flow Control–With a modified equal
percentage flow characteristic, the Control-Disk can
be used for throttling applications through 90
degrees of disk rotation. Rangeability is 100 to 1.
 High-Temperature / Cryogenic Capabilities–
Optional valve constructions allow this valve to
meet both high-temperature and cryogenic
applications.
 Sour Service Capability– Trim and bolting materials
are available for applications involving sour liquids
and gases. These constructions comply with NACE
MR0175-2002, MR0103, and MR0175 / ISO 15156.
 Spline-ended Shaft– The splined shaft with clamped
lever and single-pivot linkage reduces lost motion
between the actuator and the valve shaft.
Control-Disk NPS 14-24 Valve
D103471X012
Product Bulletin
51.3:Control-Disk NPS 14-24
October 2013