Emerson Fisher V250 Data Sheet
www.Fisher.com
D100053X012
Design V250 Rotary Control Valve
The Design V250 Hi-Ball rotary control valve
(figure 1) is designed for heavy-duty throttling and
on-off applications. Depending on size, this valve
installs between two CL600 or CL900 pipeline
flanges. The Design V250 valve is available with a
single ball seal, flow ring, or dual-seal construction.
Single-seal constructions are used in tight shutoff
applications; the flow ring construction can satisfy
higher temperature requirements. The dual-seal
construction, with a seal in the inlet and outlet
openings, is used in bidirectional flow-shutoff
applications. The Design V250 Hi-Ball valve is
typically used for throttling and controlled flow
applications in gas transmission lines, gas
distribution, or liquid pipelines.
Note
Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use and maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end-user.
Features
High Pressure Drop Capabilities—Depending
on the construction, a Design V250 valve is capable
of a maximum static pressure differential of 103 bar
(1500 psi) at 82
°C (180°F) for CL600, and 155 bar
(2250 psi) for CL900 constructions at 38
°C (100°F)
for LCC steel and CF8M (316 stainless steel).
Efficient Operation—Tapered-polygon
ball-to-shaft connection (see figure 5) and clamped
splined actuator connection (see figure 6) remove
lost motion or deadband from the drive train for
throttling control applications.
Excellent Flow Control—Reduced ball port
design provides a modified equal percentage flow
characteristic and an excellent response
characteristic.
W4177 / IL
Figure 1. Design V250 Valve with Type 1061 Actuator
Tight Shutoff—Shutoff with the Design V250
ball seal is 0.0001 percent of maximum capacity.
Greater Capacities—Design V250 ball valve
construction offers greater capacities than
conventional globe valves for both compressible and
incompressible fluids.
Sour Service Capability—Materials are
available for applications handling sour service.
These materials comply with the requirements of
NACE MR0175-2002.
Long Service Life—Pressure-balanced drive
shaft design with PTFE-lined bearings and
pressure-assisted shaft sealing arrangement
provides for a long life of reliable service.
Minimum Maintenance—Two-piece ball and
shaft assembly allows for complete trim overhaul;
parts replacement is kept to a minimum.
Excellent Environmental Capabilities—The
optional live loaded packing system is designed with
very smooth shaft surfaces and live loading to
provide excellent sealing.
Product Bulletin
51.3:V250
November 2007
V250 Valve
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